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Burger M, Webster AB, Majelantle TL, Scheun J, Ganswindt A. Method development: Assigning sex to African clawless otter spraints and assessing stability of faecal androgen and progestagen metabolites post-defaecation. MethodsX 2024; 13:102883. [PMID: 39206057 PMCID: PMC11350257 DOI: 10.1016/j.mex.2024.102883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2024] [Accepted: 07/30/2024] [Indexed: 09/04/2024] Open
Abstract
Monitoring reproductive physiology in wildlife can be a useful tool for assessing population dynamics for conservation and management purposes. Utilizing non-invasive approaches for this, such as quantifying reproductive hormone metabolites from faeces, can be challenging when defaecation events are not observed, or when cryptic species like African clawless otters (Aonyx capensis) are involved. Additionally, test systems for quantifying hormone metabolites in a species for the first time must first be reliably validated prior to use. Our results indicate that Epiandrosterone and Progesterone EIAs are most suitable for determining fAM and fPM concentrations in African clawless otter spraints. The fAM:fPM ratio and respective thresholds are more reliable in sex identification compared to the separate use of individual hormone classes. Sex-related hormone metabolite concentrations remained comparable for up to 12hrs post-defaecation in both sexes.•We screened two androgen and two progestagen enzyme-immunoassays (EIAs) for suitability and reliable quantification of faecal androgen metabolites (fAM) and faecal progestagen metabolites (fPM) in African clawless otters.•We assessed whether the ratio of fAM:fPM concentrations can be used to assign sex to faecal samples from unknown individuals.•We tested the stability of fAM and fPM concentrations post-defaecation to determine the effects of environmental exposure and bacterial metabolism.
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Affiliation(s)
- Marli Burger
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
- Endocrine Research Laboratory, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
| | - Andrea B. Webster
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
- Endocrine Research Laboratory, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
| | - Tshepiso L. Majelantle
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
- Endocrine Research Laboratory, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
| | - Juan Scheun
- Department Nature Conservation, Tshwane University of Technology, Pretoria, South Africa
| | - Andre Ganswindt
- Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa
- Endocrine Research Laboratory, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa
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ITOH M, KITAHARA M, SAWAYAMA N, MATSUMOTO N, TOYOTOME T, YAMADA K. Evaluation of the stress state based on fecal corticosterone metabolite concentrations in captive penguins in Japan. J Vet Med Sci 2024; 86:992-998. [PMID: 39085133 PMCID: PMC11422689 DOI: 10.1292/jvms.24-0112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2024] [Accepted: 07/23/2024] [Indexed: 08/02/2024] Open
Abstract
Fecal corticosterone metabolite (FCM) concentrations, which can be determined noninvasively, have recently been explored as a stress indicator in birds. In our study, we measured FCM concentrations in penguins under nonmolting or molting conditions, cool or hot season, diseased condition, and incubation period. These measurements were conducted in an aquarium that housed king penguins, gentoo penguins, and African penguins. This study aimed to investigate the validity of fecal matter as a stress indicator. Our findings revealed that FCM concentrations were significantly higher in molting individuals than in nonmolting individuals. Compared with the cool season, FCM concentrations were significantly higher in penguins housed outdoors during the hot season. However, no differences were observed in penguins housed indoors. Diseased individuals and an incubating individual showed notably higher FCM concentrations than healthy individuals. Interestingly, the FCM concentration in king penguin that underwent cataract surgery was extremely high before the surgery. However, 1 month postsurgery, it decreased to a level similar to that of healthy individuals. We observed increased FCM concentrations in penguins considered to be exposed to stressors. Notably, FCM concentration decreased after removing the stress factor. The FCM concentration was found to be consistent with the stress state of penguins, suggesting its usefulness as a stress indicator.
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Affiliation(s)
- Megumi ITOH
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan
| | - Misato KITAHARA
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan
| | | | - Naoya MATSUMOTO
- School of Veterinary Medicine, Azabu University, Kanagawa, Japan
| | - Takahito TOYOTOME
- Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan
- Diagnostic Center for Animal Health and Food Safety, Obihiro University of Agriculture and Veterinary Medicine, Hokkaido, Japan
- Medical Mycology Research Center, Chiba University, Chiba, Japan
| | - Kazutaka YAMADA
- School of Veterinary Medicine, Azabu University, Kanagawa, Japan
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Gnanadesikan GE, Bray EE, Cook EN, Levy KM, Douglas LELC, Kennedy BS, Tecot SR, MacLean EL. Basal plasma oxytocin & fecal cortisol concentrations are highly heritable and associated with individual differences in behavior & cognition in dog puppies. Horm Behav 2024; 165:105612. [PMID: 39116461 DOI: 10.1016/j.yhbeh.2024.105612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 07/15/2024] [Accepted: 07/25/2024] [Indexed: 08/10/2024]
Abstract
Oxytocin and cortisol are hormones that can influence cognition and behavior, but the relationships between endogenous concentrations and individual differences in cognitive and behavioral phenotypes remain poorly understood. Across mammals, oxytocin has important roles in diverse social behaviors, and in dogs, it has been implicated in human-oriented behaviors such as social gaze and point-following. Cortisol, an end-product of the hypothalamic-pituitary-adrenal (HPA) axis, is often studied in relation to temperament and emotional reactivity, but it is also known to modulate executive functions. In this study, we measured basal fecal cortisol (n = 247) and plasma oxytocin (n = 249) in dog puppies from a pedigreed population (Canine Companions ®). We collected cognitive and behavioral data from these subjects (n = 247), including measures of human-oriented social cognition, memory, inhibitory control, perceptual discriminations, and temperament. Oxytocin concentrations were estimated to be very highly heritable (h2 = 0.90-0.99) and cortisol concentrations were estimated to be moderately-highly heritable (h2 = 0.43-0.47). Bayesian mixed models controlling for relatedness revealed that oxytocin concentrations were positively associated with spatial working memory and displayed a negative quadratic relationship with behavioral laterality, but no credible associations were seen for social measures. Cortisol concentrations exhibited a negative linear relationship with performance on an inhibitory control task and a negative quadratic relationship with bold behavioral reactions to a novel object. Collectively, our results suggest that individual differences in oxytocin and cortisol concentrations are under strong genetic control in dogs and are associated with phenotypic variation in aspects of temperament, behavioral laterality, and executive function.
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Affiliation(s)
- Gitanjali E Gnanadesikan
- School of Anthropology, University of Arizona, Tucson, AZ 85721, USA; Laboratory for the Evolutionary Endocrinology of Primates, University of Arizona, Tucson, AZ 85721, USA; Cognitive Science Program, University of Arizona, Tucson, AZ 85721, USA; Department of Anthropology, Emory University, Atlanta, GA 30322, USA.
| | - Emily E Bray
- School of Anthropology, University of Arizona, Tucson, AZ 85721, USA; Canine Companions for Independence, Santa Rosa, CA 95402, USA; College of Veterinary Medicine, University of Arizona, Tucson, AZ 85721, USA; Psychology Department, University of Arizona, Tucson, AZ 85721, USA
| | - Erica N Cook
- School of Anthropology, University of Arizona, Tucson, AZ 85721, USA; Laboratory for the Evolutionary Endocrinology of Primates, University of Arizona, Tucson, AZ 85721, USA
| | - Kerinne M Levy
- Canine Companions for Independence, Santa Rosa, CA 95402, USA
| | | | | | - Stacey R Tecot
- School of Anthropology, University of Arizona, Tucson, AZ 85721, USA; Laboratory for the Evolutionary Endocrinology of Primates, University of Arizona, Tucson, AZ 85721, USA
| | - Evan L MacLean
- School of Anthropology, University of Arizona, Tucson, AZ 85721, USA; Cognitive Science Program, University of Arizona, Tucson, AZ 85721, USA; College of Veterinary Medicine, University of Arizona, Tucson, AZ 85721, USA; Psychology Department, University of Arizona, Tucson, AZ 85721, USA
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Fu Y, Cheng HW. The Influence of Cecal Microbiota Transplantation on Chicken Injurious Behavior: Perspective in Human Neuropsychiatric Research. Biomolecules 2024; 14:1017. [PMID: 39199404 PMCID: PMC11352350 DOI: 10.3390/biom14081017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Revised: 07/26/2024] [Accepted: 08/13/2024] [Indexed: 09/01/2024] Open
Abstract
Numerous studies have evidenced that neuropsychiatric disorders (mental illness and emotional disturbances) with aggression (or violence) pose a significant challenge to public health and contribute to a substantial economic burden worldwide. Especially, social disorganization (or social inequality) associated with childhood adversity has long-lasting effects on mental health, increasing the risk of developing neuropsychiatric disorders. Intestinal bacteria, functionally as an endocrine organ and a second brain, release various immunomodulators and bioactive compounds directly or indirectly regulating a host's physiological and behavioral homeostasis. Under various social challenges, stress-induced dysbiosis increases gut permeability causes serial reactions: releasing neurotoxic compounds, leading to neuroinflammation and neuronal injury, and eventually neuropsychiatric disorders associated with aggressive, violent, or impulsive behavior in humans and various animals via a complex bidirectional communication of the microbiota-gut-brain (MGB) axis. The dysregulation of the MGB axis has also been recognized as one of the reasons for the prevalence of social stress-induced injurious behaviors (feather pecking, aggression, and cannibalistic pecking) in chickens. However, existing knowledge of preventing and treating these disorders in both humans and chickens is not well understood. In previous studies, we developed a non-mammal model in an abnormal behavioral investigation by rationalizing the effects of gut microbiota on injurious behaviors in chickens. Based on our earlier success, the perspective article outlines the possibility of reducing stress-induced injurious behaviors in chickens through modifying gut microbiota via cecal microbiota transplantation, with the potential for providing a biotherapeutic rationale for preventing injurious behaviors among individuals with mental disorders via restoring gut microbiota diversity and function.
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Affiliation(s)
- Yuechi Fu
- Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA;
| | - Heng-Wei Cheng
- Livestock Behavior Research Unit, USDA-ARS, West Lafayette, IN 47907, USA
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DeSana AN, Morgan Benowitz-Fredericks Z, Amano A, Gazes RP. Salivary cortisol captures endocrine response to an acute stressor in captive female tufted capuchin monkeys (Sapajus apella). Am J Primatol 2024:e23677. [PMID: 39146198 DOI: 10.1002/ajp.23677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 07/24/2024] [Accepted: 07/27/2024] [Indexed: 08/17/2024]
Abstract
Measuring glucocorticoids such as cortisol is a useful tool for exploring relationships among behavior, physiology, and well-being in primates. As cortisol circulates in blood, it moves into biological matrices such as hair, urine, feces, and saliva. Saliva sampling is a simple, noninvasive method to measure cortisol that can be easily implemented by training animals to voluntarily provide samples. The temporal lag between elevation of cortisol in the blood and elevation of cortisol in saliva likely varies by species and must be characterized to identify appropriate sampling regimens. In the present study we characterized the time course of cortisol changes in saliva following an acute psychological stressor in captive tufted capuchin monkeys (Sapajus apella). We trained eight free-moving female tufted capuchin monkeys to voluntarily produce clean saliva samples. We exposed them to the acute stressor of a veterinary catch net and observed behavior pre and post exposure. We collected salivary samples immediately pre exposure (0 min) and 30, 45, 60, 75, 90, and 120 min after exposure. Salivary cortisol was quantified using a Salimetrics kit. Behavioral and cortisol measures were compared within individuals to a control condition in which no stressor was presented. Capuchins showed a clear behavioral response to the stressor by demonstrating increased freezing and pacing, decreased feed foraging, nonsocial play, and scratching, and decreased willingness to provide saliva samples after stressor presentation. After stressor presentation, average salivary cortisol began to increase at 30 min and continued to increase through the 120 min sample period. There was individual variation in absolute cortisol levels, the timing of the cortisol increase, and the timing of the peak. Our results suggest that no single time-point can be reliably used to evaluate salivary cortisol response to an acute stressor across individuals, and instead we recommend the collection of a prolonged time series.
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Affiliation(s)
- Andrew N DeSana
- Animal Behavior Program, Bucknell University, Lewisburg, Pennsylvania, USA
- University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Z Morgan Benowitz-Fredericks
- Animal Behavior Program, Bucknell University, Lewisburg, Pennsylvania, USA
- Department of Biology, Bucknell University, Lewisburg, Pennsylvania, USA
| | - Aiko Amano
- Animal Behavior Program, Bucknell University, Lewisburg, Pennsylvania, USA
| | - Regina P Gazes
- Animal Behavior Program, Bucknell University, Lewisburg, Pennsylvania, USA
- Department of Psychology, Bucknell University, Lewisburg, Pennsylvania, USA
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Wilkinson GS, Adams DM, Rayner JG. Sex, season, age and status influence urinary steroid hormone profiles in an extremely polygynous neotropical bat. Horm Behav 2024; 164:105606. [PMID: 39059233 PMCID: PMC11330717 DOI: 10.1016/j.yhbeh.2024.105606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 06/17/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024]
Abstract
Several polygynous mammals exhibit reproductive skew in which only a few males reproduce. Successful males need strength, stamina and fighting ability to exclude competitors. Consequently, during the mating season their androgens and glucocorticoids are expected to increase to support spermatogenesis and aggressive behavior. But, during the nonmating season these hormones should decline to minimize deleterious effects, such as reduced immune function. Bats that exhibit harem polygyny in which males aggressively defend large groups of females year-round are ideal for assessing hormonal and other consequences of extreme polygyny. Here we use DNA methylation to estimate age and gas chromatography, tandem mass spectrometry to profile steroid metabolites in urine of wild greater spear-nosed bats, Phyllostomus hastatus, across seasons. We find that condition, measured by relative weight, is lower during the mating season for both sexes, although it remains high in harem males during the mating season. Average age of females is greater than males, and females exhibit substantial seasonal differences in androgens, estrogens and glucocorticoids with higher levels of all hormones during the mating season. Males, however, show little seasonal differences but substantial age-associated increases in most steroid metabolites. Harem males have larger, persistently scrotal testes and are older than bachelor males. While cortisone generally declines with age, harem males maintain higher amounts of biologically active cortisol than bachelor males all year and cortisol levels increase more quickly in response to restraint in males than in females. Taken together, these results suggest that attaining reproductive dominance requires hormone levels that reduce lifespan.
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Affiliation(s)
| | - Danielle M Adams
- Department of Biology, University of Maryland, College Park, MD 20742
| | - Jack G Rayner
- Department of Biology, University of Maryland, College Park, MD 20742
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Surkova EN, Savinetskaya LE, Khropov IS, Tchabovsky AV. Flexible males, reactive females: faecal glucocorticoid metabolites indicate increased stress in the colonist population, damping with time in males but not in females. J Comp Physiol B 2024; 194:545-554. [PMID: 38953915 DOI: 10.1007/s00360-024-01564-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 05/14/2024] [Accepted: 05/21/2024] [Indexed: 07/04/2024]
Abstract
Individuals colonizing new areas at expanding ranges encounter numerous and unpredictable stressors. Exposure to unfamiliar environments suggests that colonists would differ in stress levels from residents living in familiar conditions. Few empirical studies tested this hypothesis and produced mixed results, and the role of stress regulation in colonization remains unclear. Studies relating stress levels to colonization mainly use a geographical analysis comparing established colonist populations with source populations. We used faecal glucocorticoid metabolites (FGMs) to assess both spatial and temporal dynamics of stress levels in an expanding population of midday gerbils (Meriones meridianus). We demonstrated that adult males and females had higher FGM levels in newly emerged colonies, compared with the source population, but differed in the pattern of FGM dynamics post-foundation. In males, FGM levels sharply decreased in the second year after colony establishment. In females, FGM levels did not change with time and remained high despite the decreasing environmental unpredictability, exhibiting among-individual variation. Increased stress levels of colonist males damping with time post-colonization suggest they are flexible in responding to immediate changes in environmental uncertainty. On the contrary, high and stable over generations stress levels uncoupled from the changes in the environmental uncertainty in female colonists imply that they carry a relatively constant phenotype associated with the reactive coping strategy favouring colonization. We link sex differences in consistency and plasticity in stress regulation during colonization to the sex-specific life-history strategies.
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Affiliation(s)
- Elena N Surkova
- Laboratory for Population Ecology, Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskii pr, Moscow, Russia
| | - Ludmila E Savinetskaya
- Laboratory for Population Ecology, Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskii pr, Moscow, Russia
| | - Ivan S Khropov
- Laboratory for Population Ecology, Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskii pr, Moscow, Russia
| | - Andrey V Tchabovsky
- Laboratory for Population Ecology, Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, 33 Leninskii pr, Moscow, Russia.
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Ding J, Gansel LC, Finstad B, Stene A, Bakke S, Aas GKFH, Cao Y. Investigating the biological relevance of measuring gastrointestinal cortisol metabolite levels to assess stress responses in Atlantic salmon (Salmo salar L.) after an acute stress. FISH & SHELLFISH IMMUNOLOGY 2024; 151:109729. [PMID: 38942252 DOI: 10.1016/j.fsi.2024.109729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 06/18/2024] [Accepted: 06/25/2024] [Indexed: 06/30/2024]
Abstract
Monitoring stress levels of farmed Atlantic salmon (Salmo salar) is important to ensure fish welfare and optimize farm operations. Feces could be a promising matrix for assessing stress responses in fish, based on their properties of low-invasive sampling and allowing repeated sampling over time. Meanwhile, elevated levels of cortisol metabolites (CMs) in feces indicate the increases in plasma cortisol levels (PLA) after exposure to acute stress. However, the dynamics of fecal CMs following acute stress in Atlantic salmon remain unclear. In this study, a confinement stress involving chasing and crowding was conducted to investigate the responses of gastrointestinal CMs to an acute stressor in Atlantic salmon. The post-smolts, with an average weight of 155.21 g, were sampled before and at 30 min, 1.5, 6, 12, 18, 24, 36, and 48 h after the onset of stress. Blood and gastrointestinal contents from the stomach, proximal intestine, and distal intestine of each fish were collected and subsequently analyzed, using competitive enzyme-linked immunosorbent assay (ELISA). The results demonstrated that the pre-stress level of PLA was low (4.28 ± 6.13 ng/ml) and reached a peak within 30 min following stress. The levels of CMs in gastrointestinal contents from stomach (SCMs), proximal intestine (PCMs), and distal intestine (DCMs) in pre-stress group were 0.82 ± 0.50, 18.31 ± 6.14 and 16.04 ± 6.69 ng/g, respectively. Gastrointestinal CMs increased significantly within 30 min and the peak levels of SCMs (3.51 ± 3.75 ng/g), PCMs (68.19 ± 23.71 ng/g) and DCMs (65.67 ± 23.37 ng/g) were found at 1.5 h post-stress. The significant increases in PCMs and DCMs post-stress validate the biological relevance of measuring intestinal CMs for assessing acute stress responses in Atlantic salmon. No significant difference was noted between PCMs and DCMs across all samples, suggesting that intestinal contents can serve as a suitable matrix compared with feces when measuring the responses of CMs to acute stress. The time lag between the peak of PLA levels and their reflection in the intestinal contents exceeded 1 h, indicating that using intestinal contents as a matrix to assess stress levels in fish can extend and delay the sampling window. This study highlights valuable guidance for determining the optimal times to utilize intestinal contents for measuring stress responses, providing further insights into the dynamics of fecal CM following acute stress.
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Affiliation(s)
- Jingwen Ding
- Department of Biological Sciences Aalesund, Faculty of Natural Sciences, Norwegian University of Science and Technology, Larsgardsvegen 2, 6009, Aalesund, Norway.
| | - Lars Christian Gansel
- Department of Biological Sciences Aalesund, Faculty of Natural Sciences, Norwegian University of Science and Technology, Larsgardsvegen 2, 6009, Aalesund, Norway
| | - Bengt Finstad
- Department of Biology, Norwegian University of Science and Technology, 7491, Trondheim, Norway
| | - Anne Stene
- Department of Biological Sciences Aalesund, Faculty of Natural Sciences, Norwegian University of Science and Technology, Larsgardsvegen 2, 6009, Aalesund, Norway
| | - Snorre Bakke
- Department of Biological Sciences Aalesund, Faculty of Natural Sciences, Norwegian University of Science and Technology, Larsgardsvegen 2, 6009, Aalesund, Norway
| | - Grete Kristine Følsvik Hansen Aas
- Department of Biological Sciences Aalesund, Faculty of Natural Sciences, Norwegian University of Science and Technology, Larsgardsvegen 2, 6009, Aalesund, Norway
| | - Yanran Cao
- Department of Biological Sciences Aalesund, Faculty of Natural Sciences, Norwegian University of Science and Technology, Larsgardsvegen 2, 6009, Aalesund, Norway
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Amjad R, Ruby T, Ali K, Asad M, Imtiaz A, Masood S, Saeed MQ, Arshad M, Talib S, Alvi QTA, Khan A, Sharif MM. Exploring the effects of noise pollution on physiology and ptilochronology of birds. PLoS One 2024; 19:e0305091. [PMID: 38900819 PMCID: PMC11189234 DOI: 10.1371/journal.pone.0305091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 05/22/2024] [Indexed: 06/22/2024] Open
Abstract
Short and long-term sound-induced stress on daily basis can affect the physiology of avian individuals because they are more susceptible to sound stress in an open environment. OBJECTIVES An ex-situ study was carried out to determine the impact of noise on physiology and ptilochronology of non-breeding male domesticated quail birds. METHODOLOGY During 60-days long trial, male quail birds, aged 5-weeks, weighing (c.100gm) were used. Out of 72 experimental birds, 18 birds were assigned to the Control Group (G1) while remaining 54 birds were divided equally into 3 treatment groups: Road Traffic noise (G2), Military activity noise (G3) and Human Activities noise (G4). Birds were housed in standard-sized separate cages (20 ×45 × 20 cm), every bird was kept apart in separate cage in open laboratory under maintained environmental conditions. Millet seeds and water were provided to all the experimental birds ad libitum. Noise originated from several sources of recorded high-intensity music (1125 Hz/ 90 dB), was administered for 5-6 hours per day. Observations were recorded in the morning and afternoon. The experiment was conducted during the non-breeding season from August to October in triplicate. Blood sampling was done after 60 days. RESULTS According to the current study, noise stress significantly (p<0.05) increased the concentrations of creatinine, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), bilirubin, uric acid, cholesterol, triglycerides, total protein, and glucose while a decline in the levels of albumin was seen in treatment birds of G3. While in terms of hematology, total white blood cells count (TWBC), total red blood cells count (TRBC), mean cell volume (MCV) & packed cell volume (PCV) concentrations were raised in blood of treatment birds of G3. In terms of hormones, noise stress significantly (p<0.05) increased the serum concentrations of Corticosterone in G3 while a significant (p<0.05) decline was observed in the concentrations of luteinizing hormone (LH), thyroid stimulating hormone (TSH), and follicle stimulating hormone (FSH) in the same group. Moreover, fault bar formation in G3 was more prominent than others. CONCLUSION Noise stress can significantly affect serology, hematology, hormonal physiology and ptilochronology in quail birds.
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Affiliation(s)
- Rida Amjad
- Faculty of Chemical & Biological Sciences, Department of Zoology, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
| | - Tahira Ruby
- Institute of Zoology, Bahauddin Zakariya University, Multan, Pakistan
| | - Kashif Ali
- Department of Zoology, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Muhammad Asad
- Department of Zoology, Division of Science and Technology, University of Education, Lahore, Pakistan
| | - Ayesha Imtiaz
- Institute of Zoology, Bahauddin Zakariya University, Multan, Pakistan
| | - Samra Masood
- Institute of Zoology, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Qamar Saeed
- Department of Microbiology and Molecular Genetics, Bahauddin Zakariya University, Multan, Pakistan
| | - Maryam Arshad
- Institute of Zoology, Bahauddin Zakariya University, Multan, Pakistan
| | - Saima Talib
- Department of Zoology, Government Sadiq College Women University, Bahawalpur, Pakistan
| | - Qura-tul Ain Alvi
- Institute of Zoology, Bahauddin Zakariya University, Multan, Pakistan
| | - Afifa Khan
- Institute of Zoology, Bahauddin Zakariya University, Multan, Pakistan
| | - Muhammad Muazim Sharif
- Faculty of Chemical & Biological Sciences, Department of Zoology, The Islamia University of Bahawalpur, Bahawalpur, Pakistan
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Bleke CA, Gese EM, Villalba JJ, Roberts SB, French SS. Temporal and Spatial Influences on Fawn Summer Survival in Pronghorn Populations: Management Implications from Noninvasive Monitoring. Animals (Basel) 2024; 14:1468. [PMID: 38791686 PMCID: PMC11117275 DOI: 10.3390/ani14101468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/20/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Monitoring vital rates allows managers to estimate trends in growth rates of ungulate populations. However, connecting the influence of nutrition on ungulate demography is challenging. Noninvasive sampling offers a low-cost, low-effort alternative for measuring nutritional indices, allowing for an increased understanding of the mechanistic relationships between environmental factors, nutrition, and specific population vital rates. We examined the temporal influence of intrinsic and extrinsic factors on pronghorn (Antilocapra americana) fawn recruitment. We collected fresh fecal samples from adult female pronghorn in five subpopulations spanning three sampling periods associated with critical maternal life-history stages (late gestation, early lactation, breeding season) for 2 years to investigate both intra- and interannual influences. Intrinsic factors were fecal glucocorticoid metabolites (FGMs), nutritional indices (fecal nitrogen (FN) and 2,6-diaminopimelic acid (DAPA)), and dietary composition (protein intake of forbs, graminoids, legumes, other, shrubs), while the extrinsic factor was vegetative greenness (normalized difference vegetation index (NDVI)). We found variations in DAPA, protein intake of forbs, variation in forb protein intake, and protein intake of legumes during late gestation positively influenced fawn recruitment. Fecal nitrogen during early lactation showed the strongest positive influence on the recruitment of any measured parameter. Finally, breeding season NDVI and the variation in DAPA values positively influenced the subsequent year's fawn recruitment. Our longitudinal study enabled us to investigate which parameter was most important to specific periods of fawn development and recruitment. We combined the results across five subpopulations, but interpretation and subsequent management decisions should be made at the subpopulation level such that pronghorn subpopulations with low recruitment can be positively influenced by increasing nitrogen on the landscape available to adult females during the early lactation period. As the use of noninvasive monitoring methods continues to expand, we believe our methodologies and results can be broadly applied to other ungulate monitoring programs.
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Affiliation(s)
- Cole A. Bleke
- Department of Wildland Resources, Utah State University, Logan, UT 84322, USA;
| | - Eric M. Gese
- U.S. Department of Agriculture, Wildlife Services, National Wildlife Research Center, Utah Field Station, Logan, UT 84322, USA;
| | - Juan J. Villalba
- Department of Wildland Resources, Utah State University, Logan, UT 84322, USA;
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Grundei LL, Wolf TE, Brandes F, Schütte K, Freise F, Siebert U, Touma C, Pees M. Validation of Fecal Glucocorticoid Metabolites as Non-Invasive Markers for Monitoring Stress in Common Buzzards ( Buteo buteo). Animals (Basel) 2024; 14:1234. [PMID: 38672380 PMCID: PMC11047616 DOI: 10.3390/ani14081234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2024] [Revised: 04/11/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024] Open
Abstract
For wild animals, being in captivity in wildlife centers can cause considerable stress. Therefore, it is necessary to establish and validate non-invasive tools to measure chronic stress during rehabilitation. Eight Common Buzzards which lived in permanent husbandry were placed individually into prepared aviaries and their feces were collected before, during and after a stress event for biological validation over a period of seven days. The extracted fecal glucocorticoid metabolites (fGCMs) were analyzed with three different enzyme immune assays (EIA) to find the most suitable one. Additionally, we aimed to investigate the stability of fGCM levels after defecation because further metabolization by bacterial enzymes can lead to changed results. The Cortisone-EIA performed best in males and females and showed that the stress event led to an fGCM increase of 629% (557% in females and 702% in males) in relation to basal values. We found no significant differences between the sexes, but observed significant differences between different times of day. FGCM concentration significantly changed after eight hours at room temperature. Our study successfully validated the non-invasive measurement of fGCM as a stress indicator in Common Buzzards and could therefore lay the foundation for future studies providing new insights for animal welfare research in Buzzards.
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Affiliation(s)
- Lara-Luisa Grundei
- Department of Small Mammal, Reptile and Avian Medicine and Surgery, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, 30559 Hanover, Germany
| | - Tanja E. Wolf
- Department of Behavioral Biology, School of Biology/Chemistry, Osnabrück University, Barbarastrasse 11, 49076 Osnabrück, Germany
- Mammal Research Institute, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria 0028, South Africa
| | - Florian Brandes
- Wildlife Rescue and Conservation Center, Hohe Warte 1, 31553 Sachsenhagen, Germany
| | - Karolin Schütte
- Wildlife Rescue and Conservation Center, Hohe Warte 1, 31553 Sachsenhagen, Germany
| | - Fritjof Freise
- Department of Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, Bünteweg 2, 30559 Hanover, Germany
| | - Ursula Siebert
- Institute of Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Foundation, Bischofsholer Damm 15, 30173 Hanover, Germany
| | - Chadi Touma
- Department of Behavioral Biology, School of Biology/Chemistry, Osnabrück University, Barbarastrasse 11, 49076 Osnabrück, Germany
| | - Michael Pees
- Department of Small Mammal, Reptile and Avian Medicine and Surgery, University of Veterinary Medicine Hannover, Foundation, Bünteweg 9, 30559 Hanover, Germany
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12
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Dziki-Michalska K, Tajchman K, Kowalik S, Wójcik M. The Levels of Cortisol and Selected Biochemical Parameters in Red Deer Harvested during Stalking Hunts. Animals (Basel) 2024; 14:1108. [PMID: 38612347 PMCID: PMC11010865 DOI: 10.3390/ani14071108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 03/26/2024] [Accepted: 04/03/2024] [Indexed: 04/14/2024] Open
Abstract
As a reactive species, the red deer is sensitive to both negative exogenous and endogenous stimuli. An intensive hunting period may have a particularly negative impact on game animals. The aim of this study was to determine the plasma cortisol level and biochemical parameters in 25 wild red deer (Cervus elaphus) harvested during stalking hunts in correlation with the sex and age of the animals. The mean cortisol concentrations in the stags and hinds analyzed in this study were similar (20.2 and 21.5 ng/mL, respectively). Higher HDL cholesterol values were found in the blood of the hinds than in stags (p < 0.05). Similarly, the mean levels of LDL cholesterol, lactate dehydrogenase, and alanine aminotransferase were higher by 21%, 16%, and 42%, respectively, in the blood of the hinds. In contrast, the levels of alkaline phosphatase, bilirubin, and aspartate aminotransferase were higher in the stags (by 30%, 49%, and 36%, respectively). There was a negative correlation of the cortisol concentration with urea and bilirubin and a positive correlation between cortisol and aspartate aminotransferase in the stags (p < 0.05). In turn, a negative correlation was found between the cortisol and urea levels in the hinds (p < 0.05). In summary, the stress caused by stalking hunts and the characteristic behavior of red deer during the mating season had an impact on chosen biochemical parameters. The increased concentration of cortisol resulted in a decrease in the carcass mass, which may lead to the deterioration of the physical condition of animals on hunting grounds.
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Affiliation(s)
- Katarzyna Dziki-Michalska
- Department of Animal Ethology and Wildlife Management, Faculty of Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland;
| | - Katarzyna Tajchman
- Department of Animal Ethology and Wildlife Management, Faculty of Animal Sciences and Bioeconomy, University of Life Sciences in Lublin, Akademicka 13, 20-950 Lublin, Poland;
| | - Sylwester Kowalik
- Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Akademicka 12, 20-033 Lublin, Poland
| | - Maciej Wójcik
- Regional Directorate of the State Forests in Lublin, Czechowska 4, 20-950 Lublin, Poland;
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13
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Levallois P, Leblanc-Maridor M, Lehébel A, Gavaud S, Lieubeau B, Hervé J, Fourichon C, Belloc C. Hair cortisol concentration in finishing pigs on commercial farms: variability between pigs, batches, and farms. Front Vet Sci 2024; 10:1298756. [PMID: 38317789 PMCID: PMC10839108 DOI: 10.3389/fvets.2023.1298756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/26/2023] [Indexed: 02/07/2024] Open
Abstract
Hair cortisol is a stress indicator and could be used to assess the pigs' exposure to stressors in the weeks/months prior to non-invasive hair sampling. The main aim of this study was to describe the hair cortisol concentration (HCC) variability between individuals within a batch, between farms and between batches within a farm. The secondary aim was to determine how the number of sampled pigs influences the characterization of HCC within a batch. Twenty farrow-to-finish pig farms were recruited considering the diversity of their management practices and health status (data collected). Hair was sampled in two separate batches, 8 months apart. The necks of 24 finishing pigs were clipped per batch the week prior to slaughter. To describe the variability in HCC, an analysis of the variance model was run with three explanatory variables (batch, farm and their interaction). To identify farm clusters, a principal component analysis followed by a hierarchical clustering was carried out with four active variables (means and standard deviations of the two batches per farm) and 17 supplementary variables (management practices, herd health data). We determined how the number of sampled pigs influenced the characterization of HCC within a batch by selecting subsamples of the results. HCC ranged from 0.4 to 121.6 pg/mg, with a mean of 25.9 ± 16.2 pg/mg. The variability in HCC was mainly explained by differences between pigs (57%), then between farms (24%), between batches within the same farm (16%) and between batches (3%). Three clusters of farms were identified: low homogeneous concentrations (n = 3 farms), heterogeneous concentrations with either higher (n = 7) or lower (n = 10) HCC in batch 2 than in batch 1. The diversity of management practices and health statuses allowed to discuss hypotheses explaining the HCC variations observed. We highlighted the need to sample more than 24 pigs to characterize HCC in a pig batch. HCC differences between batches on six farms suggest sampling pigs in more than one batch to describe the HCC at the farm level. HCC variations described here confirm the need to study its links with exposure of pigs to stressors.
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14
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Sadok I, Ożga K, Klich D, Olech W, Krauze-Gryz D, Beliniak A, Łopucki R. A validated LC-MS/MS method for simultaneous determination of key glucocorticoids in animal hair for applications in conservation biology. Sci Rep 2023; 13:23089. [PMID: 38155201 PMCID: PMC10754919 DOI: 10.1038/s41598-023-49940-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 12/13/2023] [Indexed: 12/30/2023] Open
Abstract
A new method for the determination of main glucocorticoids (cortisol, cortisone, and corticosterone) in hair by liquid chromatography-tandem mass spectrometry was developed. Glucocorticoids were extracted from hair shafts using methanol followed by solid-phase extraction. A validation test was performed using hair from three species of wild mammals with different body size (0.2-800 kg), lifestyle (terrestrial, burrowing and arboreal species), social organization (living in herds or solitary), and different predicted type of hair glucocorticoids: European bison (Bison bonasus), European hamster (Cricetus cricetus), and Eurasian red squirrel (Sciurus vulgaris). Regardless of the species evaluated, the method shows good linearity for all analytes accompanied by satisfactory accuracy (91-114%) and precision (RSD < 13%). Depending on the analyte and hair origin, the calculated limits of quantification were between 0.05 and 1.19 ng/mL, which corresponds to 1.28-31.51 pg/mg. Using cortisol and cortisone as examples, we have demonstrated that measuring multiple glucocorticoids simultaneously provides more comprehensive information than solely concentrating on one, thereby contributing to a more balanced and reliable interpretation of the acquired results. However, the utility of cortisol metabolites as markers of stress response in keratinized tissues should be substantiated by additional experimental studies on targeted animals. We posit that this paper could serve as a crucial catalyst to prompt such experiments.
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Affiliation(s)
- Ilona Sadok
- Department of Chemistry, Institute of Biological Sciences, Faculty of Medicine, The John Paul II Catholic University of Lublin, Konstantynów 1J, 20-708, Lublin, Poland.
| | - Kinga Ożga
- Department of Biomedicine and Environmental Research, Institute of Biological Sciences, The John Paul II Catholic University of Lublin, Konstantynów 1J, 20-708, Lublin, Poland
| | - Daniel Klich
- Department of Animal Genetics and Conservation, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786, Warsaw, Poland
| | - Wanda Olech
- Department of Animal Genetics and Conservation, Warsaw University of Life Sciences, Ciszewskiego 8, 02-786, Warsaw, Poland
| | - Dagny Krauze-Gryz
- Department of Forest Zoology and Wildlife Management, Warsaw University of Life Sciences, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Agata Beliniak
- Department of Forest Zoology and Wildlife Management, Warsaw University of Life Sciences, Nowoursynowska 159, 02-776, Warsaw, Poland
| | - Rafał Łopucki
- Department of Biomedicine and Environmental Research, Institute of Biological Sciences, The John Paul II Catholic University of Lublin, Konstantynów 1J, 20-708, Lublin, Poland
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15
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Jerem P, Romero LM. It's cool to be stressed: body surface temperatures track sympathetic nervous system activation during acute stress. J Exp Biol 2023; 226:jeb246552. [PMID: 37767773 PMCID: PMC10629684 DOI: 10.1242/jeb.246552] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 09/24/2023] [Indexed: 09/29/2023]
Abstract
The acute stress response can be considered the primary evolutionary adaptation to maximise fitness in the face of unpredictable environmental challenges. However, the difficulties of assessing physiology in natural environments mean that comparatively little is known about how response variation influences fitness in free-living animals. Currently, determining acute stress physiology typically involves blood sampling or cardiac monitoring. Both require trapping and handling, interrupting natural behaviour, and potentially biasing our understanding toward trappable species/individuals. Importantly, limits on repeated sampling also restrict response phenotype characterisation, vital for linking stress with fitness. Surface temperature dynamics resulting from peripheral vasomotor activity during acute stress are increasingly promoted as alternative physiological stress indicators, which can be measured non-invasively using infrared thermal imaging, overcoming many limitations of current methods. Nonetheless, which aspects of stress physiology they represent remains unclear, as the underlying mechanisms are unknown. To date, validations have primarily targeted the hypothalamic-pituitary-adrenal axis, when the sympathetic-adrenal-medullary (SAM) system is likely the primary driver of vasomotor activity during acute stress. To address this deficit, we compared eye and bill region surface temperatures (measured using thermal imaging) with SAM system activity (measured as heart rate variability via electrocardiogram telemetry) in wild-caught captive house sparrows (Passer domesticus) during capture and handling. We found that lower body surface temperatures were associated with increased sympathetic nervous system activation. Consequently, our data confirm that body surface temperatures can act as a proxy for sympathetic activation during acute stress, providing potentially transformative opportunities for linking the acute stress response with fitness in the wild.
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Affiliation(s)
- Paul Jerem
- Groningen Institute for Evolutionary Life Sciences, University of Groningen, 9700 CC Groningen, The Netherlands
- Department of Biology, Tufts University, Medford, MA 02155, USA
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16
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Chancellor S, Grasse B, Sakmar T, Scheel D, Brown JS, Santymire RM. Exploring the Effect of Age on the Reproductive and Stress Physiology of Octopus bimaculoides Using Dermal Hormones. Animals (Basel) 2023; 13:3115. [PMID: 37835721 PMCID: PMC10571824 DOI: 10.3390/ani13193115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/02/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023] Open
Abstract
Our goal was to validate the use of dermal swabs to evaluate both reproductive and stress physiology in the California two-spot octopus, Octopus bimaculoides. Our objectives were to (1) use dermal swabs to evaluate glucocorticoids and reproductive hormones of O. bimaculoides; (2) determine the influence of life stage on hormone production (glucocorticoids in all individuals; testosterone, estrogen, and progesterone in females; and testosterone in males) of reproductive (n = 4) and senescent (n = 8) individuals to determine the effect of age on hormonal patterns; and (3) determine whether these hormones change significantly in response to an acute stressor. For the stress test, individuals were first swabbed for a baseline and then chased around the aquarium with a net for 5 min. Afterward, individuals were swabbed for 2 h at 15 min intervals to compare to the pre-stress test swab. Reproductive individuals responded to the stressor with a 2-fold increase in dermal cortisol concentrations at 15 and 90 min. Six of the eight senescent individuals did not produce a 2-fold increase in dermal cortisol concentrations. Reproductive individuals had significantly higher sex hormone concentrations compared to senescent individuals (progesterone and estradiol measured in females, and testosterone for both sexes). After the stressor, only reproductive males produced a 2-fold increase in dermal testosterone concentrations, while sex hormones in females showed no change. The stress hormone cortisol was significantly higher in senescent than in reproductive individuals, independent of sex. Dermal corticosterone concentrations were highest in senescent females followed by senescent males, and lowest in reproductive individuals regardless of sex. Dermal swabs provide an effective and noninvasive means for evaluating octopus hormones. Application of these indicators may be imperative as cephalopods are more commonly cultured in captivity for experimentation, display, and consumption.
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Affiliation(s)
| | - Bret Grasse
- Marine Biological Laboratory, Woods Hole, MA 02543, USA; (B.G.); (T.S.)
| | - Taylor Sakmar
- Marine Biological Laboratory, Woods Hole, MA 02543, USA; (B.G.); (T.S.)
| | - David Scheel
- Institute of Culture and the Environment, Alaska Pacific University, Anchorage, AK 99508, USA;
| | - Joel S. Brown
- Department of Integrated Mathematical Oncology, Moffitt Cancer Center, Tampa, FL 33612, USA;
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17
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Bertrand DA, Berman CM, Heistermann M, Agil M, Sutiah U, Engelhardt A. Effects of Tourist and Researcher Presence on Fecal Glucocorticoid Metabolite Levels in Wild, Habituated Sulawesi Crested Macaques ( Macaca nigra). Animals (Basel) 2023; 13:2842. [PMID: 37760243 PMCID: PMC10525950 DOI: 10.3390/ani13182842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
Ecotourism managers and researchers often assume that apparently habituated primate groups no longer experience adverse consequences of prolonged exposure to tourists or researchers. We examined the effects of tourists and researchers on fecal glucocorticoid metabolite output (FGCM) in three critically endangered, wild crested macaque (Macaca nigra) groups in Tangkoko Nature Reserve, Sulawesi, Indonesia. We assayed FGCM from 456 fecal samples collected from thirty-three adults. Tourists can walk through and among macaque groups freely. Hence, we examined the possible effects of tourists both (1) in the reserve when away and not interacting with the study groups and (2) when they were present within the macaque groups. Generalized Linear Mixed Model (GLMM) analysis indicated that when tourists were present in the forest, but not directly among the macaques, FGCM levels in the macaque tourism groups were higher in months with more tourists. When tourists were among the macaque groups, some female macaques experienced rises and subsequent postexposure decreases in FGCM levels, consistent with predictions for acute stress. Male FGCM levels increased with tourist numbers within the group. Nevertheless, they were not significantly different from levels during undisturbed or postexposure conditions. FGCM responses related to researchers in groups varied by group, sex, and tourist presence. However, the temporal patterning of FGCM responses showed little evidence of chronic stress from tourism at this site.
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Affiliation(s)
| | - Carol M. Berman
- Department of Anthropology, University at Buffalo, Buffalo, NY 14261, USA
- Evolution, Ecology, & Behavior Program, Department of Environment and Sustainability, University at Buffalo, Buffalo, NY 14260, USA
| | - Michael Heistermann
- German Primate Centre, Endocrinology Laboratory, Leibniz Institute for Primate Research, 37077 Goettingen, Germany
| | - Muhammad Agil
- Faculty of Veterinary Medicine, Bogor Agricultural University, Bogor 16680, Indonesia
| | - Uni Sutiah
- Faculty of Veterinary Medicine, Bogor Agricultural University, Bogor 16680, Indonesia
| | - Antje Engelhardt
- School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool L3 3AF, UK
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18
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Brown KL, Ganswindt A, Steenkamp G, Tordiffe ASW. Responses to Reduced Feeding Frequency in Captive-Born Cheetahs ( Acinonyx jubatus): Implications for Behavioural and Physiological Stress and Gastrointestinal Health. Animals (Basel) 2023; 13:2783. [PMID: 37685047 PMCID: PMC10486355 DOI: 10.3390/ani13172783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 08/22/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023] Open
Abstract
Unnatural diet composition and frequent feeding regimes may play an aetiological role in the multiple diseases prevalent in captive cheetahs. This study investigated the responses of captive-born (hand-reared) cheetahs (n = 6) to a reduced feeding frequency schedule distinguished by offering larger quantities of food less frequently. The study cheetahs were fed four once-daily meals per week during the 3-week treatment period, followed by a 3-week control period in which they were fed two daily rations six days a week. Total weekly food intake was maintained throughout the study. Variations in behaviour, faecal consistency score (FCS), and faecal glucocorticoid metabolite concentration were measured. Less frequent feeding resulted in higher FCS (p < 0.01) and locomotory behaviour (p < 0.05) among the studied cheetahs. Faecal glucocorticoid metabolite concentration demonstrated an initial acute stress response to the change in feeding frequency (p < 0.05) and subsequent adaptation. The results of the FCS analysis suggest that the more natural feeding pattern could have benefited the studied cheetahs' gastrointestinal health without a significant behavioural or physiological stress response overall to the change in feeding frequency.
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Affiliation(s)
- Kelsey Lee Brown
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa
| | - André Ganswindt
- Department of Zoology and Entomology, Faculty of Natural and Agricultural Sciences, Mammal Research Institute, University of Pretoria, Pretoria 0028, South Africa
| | - Gerhard Steenkamp
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa
| | - Adrian Stephen Wolferstan Tordiffe
- Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa
- Centre for Veterinary Wildlife Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria 0110, South Africa
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19
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Stocker M, O’Sullivan EP, Palme R, Millesi E, Sonnweber R. Measurement of Salivary Cortisol in Two New World Primate Species. BIOLOGY 2023; 12:1181. [PMID: 37759581 PMCID: PMC10525777 DOI: 10.3390/biology12091181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2023] [Revised: 08/10/2023] [Accepted: 08/28/2023] [Indexed: 09/29/2023]
Abstract
Glucocorticoids (GCs) are mammalian steroid hormones involved in a variety of physiological processes, including metabolism, the immune response, and cardiovascular functions. Due to their link to the physiological stress response, GC measurement is a valuable tool for conservation and welfare assessment in animal populations. GC levels can be measured from different matrices, such as urine and feces. Moreover, especially in captive settings, measuring GCs from saliva samples proved particularly useful as those samples can be collected non-invasively and easily from trained animals. Salivary GC levels can be measured using a variety of analytical methods, such as enzyme immunoassays. However, it is crucial to validate the analytical method for each specific application and species when using a new matrix. Using high-pressure liquid chromatography and a cortisol enzyme immunoassay, we show that the main glucocorticoids secreted in the saliva of squirrel monkeys and brown capuchin monkeys are cortisol and cortisone. Our biological validation found the expected salivary cortisol level to decline throughout the day. Our findings support the reliability of salivary cortisol measurements and their potential to be used as a valid tool in research and welfare assessment for these non-human primates.
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Affiliation(s)
- Martina Stocker
- Animal Science Department, Biomedical Primate Research Centre, 2288 GJ Rijswijk, The Netherlands
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
| | - Eoin P. O’Sullivan
- School of Psychology and Neuroscience, University of St Andrews, St Andrews KY16 9JP, UK
| | - Rupert Palme
- Unit of Physiology, Pathophysiology and Experimental Endocrinology, Department of Biomedical Sciences, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Eva Millesi
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
| | - Ruth Sonnweber
- Department of Behavioral and Cognitive Biology, University of Vienna, 1030 Vienna, Austria
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20
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Kastelic M, Gregurić Gračner G, Tomažič I, Kvapil P, Harej M, Dovč A. Comparison of Cortisol Concentrations in Different Matrices in Alpine Ibex ( Capra ibex) at the Zoo. Animals (Basel) 2023; 13:2491. [PMID: 37570299 PMCID: PMC10417618 DOI: 10.3390/ani13152491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/31/2023] [Accepted: 08/01/2023] [Indexed: 08/13/2023] Open
Abstract
The usefulness of blood collection using venipuncture versus kissing bugs or medicinal leeches and the collection of saliva, faeces, hair, urine, and tears for measuring "immunoreactive" C (iC) concentration in Alpine ibexes was verified using commercial enzyme immunoassays. The mean value of serum C was highest in serum collected using venipuncture and lowest in serums collected using kissing bugs. Statistically significant differences were observed between venipuncture and kissing bugs and between leeches and kissing bugs. However, no statistically significant difference was found in C concentrations between samples collected with venipuncture and those collected with leeches. The highest mean value of C concentration was measured in serum (all three methods), followed by that in hair and faeces, and the lowest mean value was found in saliva. Statistically significant differences were found between saliva and faeces samples and between saliva and hair samples. The difference between the concentrations for faeces and hair was not statistically significant. A significant difference in C concentration between males and females was found in saliva. A significant difference in C concentration among different ages was measured in serum obtained using venipuncture in all three groups and in faeces between the groups older than ten years and younger than 10 months. Highly significant differences in C concentrations were also found between hair sampled in summer and hair sampled in autumn. Collecting tear and urine samples is a laborious procedure and is therefore less acceptable for C determination. Due to the small number of samples, statistical values are not given for these two matrices.
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Affiliation(s)
- Marjan Kastelic
- Zoo Ljubljana, Večna Pot 70, 1000 Ljubljana, Slovenia; (M.K.); (P.K.); (M.H.)
- Institute for Poultry, Birds, Small Mammals and Reptiles, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1000 Ljubljana, Slovenia
| | - Gordana Gregurić Gračner
- Department of Animal Hygiene, Behaviour and Animal Welfare, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia;
| | - Iztok Tomažič
- The Group for Biological Education, Department of Biology, Biotechnical Faculty, University of Ljubljana, Večna Pot 111, 1000 Ljubljana, Slovenia;
| | - Pavel Kvapil
- Zoo Ljubljana, Večna Pot 70, 1000 Ljubljana, Slovenia; (M.K.); (P.K.); (M.H.)
| | - Mojca Harej
- Zoo Ljubljana, Večna Pot 70, 1000 Ljubljana, Slovenia; (M.K.); (P.K.); (M.H.)
| | - Alenka Dovč
- Institute for Poultry, Birds, Small Mammals and Reptiles, Veterinary Faculty, University of Ljubljana, Gerbičeva 60, 1000 Ljubljana, Slovenia
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21
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Guan X, Zhu J, Yi L, Sun H, Yang M, Huang Y, Pan H, Wei H, Zhao H, Zhao Y, Zhao S. Comparison of the gut microbiota and metabolites between Diannan small ear pigs and Diqing Tibetan pigs. Front Microbiol 2023; 14:1197981. [PMID: 37485506 PMCID: PMC10359432 DOI: 10.3389/fmicb.2023.1197981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/12/2023] [Indexed: 07/25/2023] Open
Abstract
Objective Host genetics and environment participate in the shaping of gut microbiota. Diannan small ear pigs and Diqing Tibetan pigs are excellent native pig breeds in China and live in different environments. However, the gut microbiota of Diannan small ear pigs and Diqing Tibetan pigs were still rarely understood. Therefore, this study aimed to analyze the composition characteristics of gut microbiota and metabolites in Diannan small ear pigs and Diqing Tibetan pigs. Methods Fresh feces of 6 pigs were randomly collected from 20 4-month-old Diannan small ear pigs (DA group) and 20 4-month-old Diqing Tibetan pigs (TA group) for high-throughput 16S rRNA sequencing and liquid chromatography-mass spectrometry (LC-MS) non-targeted metabolome analysis. Results The results revealed that Firmicutes and Bacteroidetes were the dominant phyla in the two groups. Chao1 and ACE indices differed substantially between DA and TA groups. Compared with the DA group, the relative abundance of Prevotellaceae, and Ruminococcus was significantly enriched in the TA group, while the relative abundance of Lachnospiraceae, Actinomyces, and Butyricicoccus was significantly reduced. Cholecalciferol, 5-dehydroepisterol, stigmasterol, adrenic acid, and docosahexaenoic acid were significantly enriched in DA group, which was involved in the steroid biosynthesis and biosynthesis of unsaturated fatty acids. 3-phenylpropanoic acid, L-tyrosine, phedrine, rhizoctin B, and rhizoctin D were significantly enriched in TA group, which was involved in the phenylalanine metabolism and phosphonate and phosphinate metabolism. Conclusion We found that significant differences in gut microbiota composition and metabolite between Diannan small ear pigs and Diqing Tibetan pigs, which provide a theoretical basis for exploring the relationship between gut microbiota and pig breeds.
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Affiliation(s)
- Xuancheng Guan
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
| | - Junhong Zhu
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
| | - Lanlan Yi
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
| | - Haichao Sun
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
| | - Minghua Yang
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
| | - Ying Huang
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
| | - Hongbin Pan
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
| | - Hongjiang Wei
- Key Laboratory for Porcine Gene Editing and Xenotransplantation in Yunnan Province, Kunming, China
| | - Hongye Zhao
- Key Laboratory for Porcine Gene Editing and Xenotransplantation in Yunnan Province, Kunming, China
| | - Yanguang Zhao
- Shanghai Laboratory Animal Research Center, Shanghai, China
| | - Sumei Zhao
- Yunnan Key Laboratory of Animal Nutrition and Feed Science, Yunnan Agricultural University, Kunming, China
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22
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Fernandez Ajó A, Pirotta E, Bierlich KC, Hildebrand L, Bird CN, Hunt KE, Buck CL, New L, Dillon D, Torres LG. Assessment of a non-invasive approach to pregnancy diagnosis in gray whales through drone-based photogrammetry and faecal hormone analysis. ROYAL SOCIETY OPEN SCIENCE 2023; 10:230452. [PMID: 37476509 PMCID: PMC10354484 DOI: 10.1098/rsos.230452] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 06/26/2023] [Indexed: 07/22/2023]
Abstract
Knowledge of baleen whales' reproductive physiology is limited and requires long-term individual-based studies and innovative tools. We used 6 years of individual-level data on the Pacific Coast Feeding Group gray whales to evaluate the utility of faecal progesterone immunoassays and drone-based photogrammetry for pregnancy diagnosis. We explored the variability in faecal progesterone metabolites and body morphology relative to observed reproductive status and estimated the pregnancy probability for mature females of unknown reproductive status using normal mixture models. Individual females had higher faecal progesterone concentrations when pregnant than when presumed non-pregnant. Yet, at the population level, high overlap and variability in progesterone metabolite concentrations occurred between pregnant and non-pregnant groups, limiting this metric for accurate pregnancy diagnosis in gray whales. Alternatively, body width at 50% of the total body length (W50) correctly discriminated pregnant from non-pregnant females at individual and population levels, with high accuracy. Application of the model using W50 metric to mature females of unknown pregnancy status identified eight additional pregnancies with high confidence. Our findings highlight the utility of drone-based photogrammetry to non-invasively diagnose pregnancy in this group of gray whales, and the potential for improved data on reproductive rates for population management of baleen whales generally.
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Affiliation(s)
- A. Fernandez Ajó
- Geospatial Ecology of Marine Megafauna Lab, Marine Mammal Institute, Department of Fisheries, Wildlife and Conservation Sciences, Oregon State University, Newport 97365, OR, USA
| | - E. Pirotta
- Centre for Research into Ecological and Environmental Modelling, University of St Andrews, St Andrews, UK
| | - K. C. Bierlich
- Geospatial Ecology of Marine Megafauna Lab, Marine Mammal Institute, Department of Fisheries, Wildlife and Conservation Sciences, Oregon State University, Newport 97365, OR, USA
| | - L. Hildebrand
- Geospatial Ecology of Marine Megafauna Lab, Marine Mammal Institute, Department of Fisheries, Wildlife and Conservation Sciences, Oregon State University, Newport 97365, OR, USA
| | - C. N. Bird
- Geospatial Ecology of Marine Megafauna Lab, Marine Mammal Institute, Department of Fisheries, Wildlife and Conservation Sciences, Oregon State University, Newport 97365, OR, USA
| | - K. E. Hunt
- Smithsonian-Mason School of Conservation, Department of Biology, George Mason University, 1500 Remount Road, Front Royal, VA 22630, USA
| | - C. L. Buck
- Department of Biological Sciences, Northern Arizona University, 617 South Beaver Street, Flagstaff, AZ 86011, USA
| | - L. New
- Ursinus College, 601 East Main Street, Collegeville, PA 19426, USA
| | - D. Dillon
- Department of Biological Sciences, Northern Arizona University, 617 South Beaver Street, Flagstaff, AZ 86011, USA
| | - L. G. Torres
- Geospatial Ecology of Marine Megafauna Lab, Marine Mammal Institute, Department of Fisheries, Wildlife and Conservation Sciences, Oregon State University, Newport 97365, OR, USA
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23
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Flacke GL, Penfold LM, Schwarzenberger F, Martin GB, Rosales-Nieto CA, C J Paris M. Non-invasive Assessment of Fecal Glucocorticoid and Androgen Metabolites in the Pygmy Hippopotamus (Choeropsis liberiensis). Gen Comp Endocrinol 2023:114338. [PMID: 37348682 DOI: 10.1016/j.ygcen.2023.114338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 05/21/2023] [Accepted: 06/15/2023] [Indexed: 06/24/2023]
Abstract
The pygmy hippopotamus (Choeropsis liberiensis) is an endangered species endemic to the Upper Guinea Forest ecosystem in West Africa. We have limited information concerning the species' reproduction and well-being under managed care. We therefore developed non-invasive methods for characterizing gonadal androgen and adrenal hormone profiles in pygmy hippos using fecal samples collected from 12 males and 12 females housed in North American zoological institutions. We aimed to: 1) identify and validate enzyme immunoassays (EIAs) for measuring metabolites of corticosteroids and testosterone in feces; and 2) test whether gonadal activity is correlated with previous breeding history, season or type of housing. For glucocorticoids, several EIAs for measuring metabolites were investigated. A group-specific EIA exhibiting cross-reactivity with 11,17-dioxoandrostane (DOA) metabolites of cortisol most clearly reflected adrenocortical activity in response to ACTH1 challenge in both males and females. However, day-to-day concentrations of this metabolite in the feces of pygmy hippos that did not undergo ACTH challenge were near the detection limits of the assay, making this EIA impractical for assessing glucocorticoid activity in this species. Another group-specific EIA, exhibiting cross-reactivity with 5α-pregnane-3β,11β,21-triol-20-one, produced biologically relevant data and evidence of an appropriate response to pharmacological challenge with exogenous ACTH. The testosterone metabolite assay C196 (Arbor Assays, Ann Arbor, Michigan, USA) also produced biologically coherent data: adult males exhibited the highest mean androgen metabolite concentrations (477 ng/g), followed by adult females (259 ng/g) and juvenile males (160 ng/g). Proven breeding males had higher, but not significantly different, mean concentrations (472 ng/g) to unproven males (352 ng/g; P = 0.400). Similarly, adult males housed outdoors year-round in subtropical climates exhibited higher, but not statistically different mean concentrations (554 ng/g) to males in temperate climates that were housed indoors at least part of the year (412 ng/g; P = 0.208). There were, however, significant differences in mean concentrations among seasons for adult males, with higher values in spring (546 ng/g) and summer (542 ng/g) than in autumn (426 ng/g) and winter (388 ng/g, P = 0.003). In conclusion, we identified EIAs for the measurement of fecal metabolites of androgens and glucocorticoids that can be used for further studies to monitor gonadal activity in male pygmy hippos and adrenocortical activity in both sexes. We also identified a seasonal trend in male gonadal activity in this species under managed care in North America. Finally, our findings highlight an important consideration when using non-invasive methods for evaluating fecal cortisol metabolites: ACTH used for pharmacological validation of an EIA does not necessarily equate to biological relevance.
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Affiliation(s)
- Gabriella L Flacke
- UWA School of Agriculture and Environment, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia; Department of Animal Health, Zoo Miami, 12400 SW 152(nd) Street, Miami, Florida 33177, USA.
| | - Linda M Penfold
- South East Zoo Alliance for Reproduction & Conservation, 581705 White Oak Road, Yulee, FL 32097, USA.
| | - Franz Schwarzenberger
- Department of Biomedical Sciences - Endocrinology, University of Veterinary Medicine (Vetmeduni Vienna), Veterinärplatz 1, 1210 Vienna, Austria.
| | - Graeme B Martin
- UWA School of Agriculture and Environment, University of Western Australia, 35 Stirling Highway, Crawley 6009, Australia
| | - César A Rosales-Nieto
- Department of Agricultural Sciences, Texas State University, 601 University Drive, San Marcos, Texas 78666, USA.
| | - Monique C J Paris
- Institute for Breeding Rare and Endangered African Mammals (IBREAM), Edinburgh EH3 6AT, United Kingdom; Mammal Research Institute and Centre for Neuroendocrinology, University of Pretoria, Department of Zoology and Entomology, Pretoria 0084, South Africa; College of Public Health, Veterinary and Medical Sciences, James Cook University, Townsville 4811, Australia.
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24
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Tallo-Parra O, Salas M, Manteca X. Zoo Animal Welfare Assessment: Where Do We Stand? Animals (Basel) 2023; 13:1966. [PMID: 37370476 DOI: 10.3390/ani13121966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
Zoological institutions, such as zoos and aquariums, have made animal welfare a top priority, as it is not only a moral obligation but also crucial for fulfilling their roles in education and conservation. There is a need for science-based tools to assess and monitor animal welfare in these settings. However, assessing the welfare of zoo animals is challenging due to the diversity of species and lack of knowledge on their specific needs. This review aims to discuss the advantages and disadvantages of existing methodologies for assessing zoo animal welfare through: (1) A critical analysis of the main approaches to zoo animal welfare assessment; (2) A description of the most relevant animal-based welfare indicators for zoo animals with a particular focus on behavioural and physiological indicators; and (3) An identification of areas that require further research.
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Affiliation(s)
- Oriol Tallo-Parra
- School of Veterinary Science, Universitat Autònoma de Barcelona, Campus UAB, 08193 Barcelona, Spain
- Animal Welfare Education Centre, AWEC Advisors SL, Universitat Autònoma de Barcelona, Campus UAB, 08193 Barcelona, Spain
| | - Marina Salas
- Antwerp Zoo Centre for Research and Conservation, Royal Zoological Society of Antwerp, Koningin Astridplein 20-26, 2018 Antwerpen, Belgium
| | - Xavier Manteca
- School of Veterinary Science, Universitat Autònoma de Barcelona, Campus UAB, 08193 Barcelona, Spain
- Animal Welfare Education Centre, AWEC Advisors SL, Universitat Autònoma de Barcelona, Campus UAB, 08193 Barcelona, Spain
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25
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Amjad R, Ruby T, Talib S, Zahra S, Liaquat M, Batool A. Noise-induced hormonal & morphological malformations in breeding pigeons. BRAZ J BIOL 2023; 84:e271945. [PMID: 37255177 DOI: 10.1590/1519-6984.271945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 04/12/2023] [Indexed: 06/01/2023] Open
Abstract
Environmental pollution has the potential to have a significant impact on animal's health especially on birds due to daily exposure and habitat. This experimental study was carried out for a 60 days period in which, a total of 24 pigeon birds with suitable weight (80-100 g) were kept in Animal house with suitable environmental conditions viz, controlled temperature, humidity & light source to minimize any other stress. Out of twenty-four, eighteen birds were divided into three treatment groups (6 birds in each group). Whole experiment was run in triplicate manner in breeding season. One served as Control (Group 1) and remaining three were experimental groups including Road traffic noise (Group 2), Military noise (Group 3) & Human activities noise (Group 4). Noise was applied as recorded high intensity music (1125 Hz/ 90 dB) through speakers for 5-6 hrs. daily. Blood sampling was done after 20, 40 and 60 days by sacrificing treatment birds. Noise stress significantly (p<0.05) increase the serum levels of corticosterone and thyroid stimulating hormone (TSH) in Group 2 while significantly (p<0.05) decrease the serum levels of luteinizing hormone (LH) and follicle stimulating hormone (FSH) of Group 3 birds. Moreover, major fault bars formation was seen both in Group 2 and Group 3. It was concluded as that Noise stress caused rise in serum levels of Corticosterone and TSH but fall in LH and FSH. Along with fault bars formation was also prominent in all treatment groups due to stress hormone.
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Affiliation(s)
- R Amjad
- The Islamia University of Bahawalpur, Department of Zoology, Bahawalpur, Pakistan
| | - T Ruby
- Bahauddin Zakariya University, Institute of Pure and Applied Biology, Zoology Division, Multan, Pakistan
| | - S Talib
- Government Sadiq College Women University, Department of Zoology, Bahawalpur, Pakistan
| | - S Zahra
- Government Sadiq College Women University, Department of Zoology, Bahawalpur, Pakistan
| | - M Liaquat
- Bahauddin Zakariya University, Institute of Pure and Applied Biology, Zoology Division, Multan, Pakistan
| | - A Batool
- University of Narowal, Department of Zoology, Narowal, Pakistan
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26
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Alejandro J, Yamanashi Y, Nemoto K, Mouri K, Huang CW, Bercovitch FB, Huffman MA. Reducing stress and stereotypic behaviors in captive female pygmy slow lorises (Nycticebus pygmeaus). Am J Primatol 2023:e23495. [PMID: 37128737 DOI: 10.1002/ajp.23495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 03/20/2023] [Accepted: 04/08/2023] [Indexed: 05/03/2023]
Abstract
Improving captive conditions of pygmy slow lorises (Nekaris and Nijman have recently suggested that the pygmy slow loris should be called the pygmy loris and is distinctive enough to warrant a new genus, Xanthonycticebu) (Nycticebus pygmeaus) poses many challenges because detailed aspects of their lives in the wild are incomplete. This hinders efforts to replicate sustainable environments for them. To improve their well-being in captivity, eight rescued female pygmy slow lorises at the Japan Monkey Center (JMC) were socially housed in two types of groups following their solitary housing: two pairs and one group of four individuals. They spent much of their time in affiliative behaviors, as well as sharing sleeping sites after placement in a social group. The purpose of my study was to examine whether social housing helped in reducing stress by comparing fecal glucocorticoids and stereotypic behaviors when housed alone and when with conspecifics. Overall, the levels of fecal glucocorticoids were significantly lower when socially housed than when kept alone. One individual exhibited stereotypic behavior when housed alone, but this behavior disappeared after social housing. These findings support recent evidence that pygmy slow lorises are social animals and will benefit from group housing in captivity. We conclude that social housing of pygmy slow lorises improves their well-being by reducing stress levels, and that their group housing in captivity can provide dividends for the conservation of this endangered nocturnal primate because lorises intended for release should find it easier to adapt to natural conditions.
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Affiliation(s)
- Josue Alejandro
- Wildlife Research Center (WRC), Kyoto University, Inuyama, Aichi, Japan
| | - Yumi Yamanashi
- Wildlife Research Center (WRC), Kyoto University, Inuyama, Aichi, Japan
- Center for Research and Education of Wildlife (CREW), Kyoto City Zoo, Kyoto, Sakyo-ku, Japan
| | - Kei Nemoto
- Japan Monkey Centre (JMC), Inuyama, Aichi, Japan
| | - Keiko Mouri
- Wildlife Research Center (WRC), Kyoto University, Inuyama, Aichi, Japan
| | - Ching-Wen Huang
- Institute of Wildlife Conservation (IWC), Pingtung County, Taiwan
| | - Fred B Bercovitch
- Wildlife Research Center (WRC), Kyoto University, Inuyama, Aichi, Japan
| | - Michael A Huffman
- Wildlife Research Center (WRC), Kyoto University, Inuyama, Aichi, Japan
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27
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Corlatti L, Palme R, Valencak TG, Gomez KM. Season-dependent impact of forage quality on stress in alpine chamois. Ecol Evol 2023; 13:e10045. [PMID: 37139402 PMCID: PMC10150231 DOI: 10.1002/ece3.10045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 03/27/2023] [Accepted: 04/12/2023] [Indexed: 05/05/2023] Open
Abstract
Chronically heightened stress levels in wildlife species may have detrimental effects on individual life history traits, for example, through the increased likelihood of disease, parasitic infections, and overall reduced fitness. Understanding the drivers of stress may thus have great potential for informing wildlife conservation. Although the role of climate and individual status is well studied in stress ecology, the impact of related stressors such as dietary quality is of increasing interest to wildlife research and conservation. In this study, fecal cortisol metabolites (FCMs) in Alpine chamois Rupicapra r. rupicapra used as bioindicators of stress, and their relationship with forage quality-measured as the percentage of fecal crude protein (CP)-were investigated. Data collection took place in 2011 and 2012 in the Gran Paradiso National Park (Western Italian Alps), on 22 individually marked adult males. The relationship between FCMs and CPs was analyzed through linear models and separated between winter and summer months, accounting for the effect of potentially confounding exogenous and endogenous variables. After AICc-based model selection, we found that forage quality was negatively related to FCM levels in Alpine chamois during the summer months, meaning that higher quality forage was associated with the decreased expression of stress hormones. However, during the winter months, we did not find a significant relationship, potentially as a result of forage quality being ubiquitously poor. Although the mechanisms through which dietary variations impact FCM concentrations in wildlife populations are largely unknown, the occurrence of significant relationships between forage quality and stress levels supports potentially important implications for the long-term effect of climatic changes on the fitness of wildlife populations.
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Affiliation(s)
- Luca Corlatti
- Chair of Wildlife Ecology and ManagementUniversity of FreiburgFreiburgGermany
- Stelvio National Park – ERSAF LombardiaBormioItaly
| | - Rupert Palme
- Department of Biomedical SciencesUniversity of Veterinary MedicineViennaAustria
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28
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King AG, Edwards PD, Cote S, Palme R, Boonstra R, Sicotte P. Assessing stress in wild black-and-white colobus monkeys non-invasively. Gen Comp Endocrinol 2023; 334:114212. [PMID: 36646325 DOI: 10.1016/j.ygcen.2023.114212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 12/02/2022] [Accepted: 01/11/2023] [Indexed: 01/15/2023]
Abstract
Analysis of glucocorticoid profiles serves as a valuable, multi-faceted tool for insight into the behavior and physiology of wild populations. Recently, the measurement of fecal glucocorticoid metabolites (FCMs) has exploded in popularity due to its compatibility with noninvasive techniques and remote environments A critical first step is to perform a biological validation to ensure that the assay accurately reflect changes in FCM levels. We use an enzyme immunoassay (EIA) to perform a biological validation on samples collected from two males and six females in a wild population of Colobus vellerosus in response to three naturally occurring potential stressors. We also describe the FCM response pattern in the week following parturition in three females and examine the influence of sex, reproductive state, and time of day on the concentrations of baseline samples collected daily from 13 adult individuals over a period of four months. We validated the assay: FCM levels increase in response to natural stressors with a two-day lag. In the two days surrounding parturition, FMC levels increased. Baseline concentrations were affected by collection time and female reproductive state, with lactating females having lower concentrations than pregnant or cycling females. Thus, we successfully carried out the first validation and characterization of FCMs in a wild African colobine. This will serve as an essential foundation for future studies of C. vellerosus and similar wild primates whose objective is to investigate the role glucocorticoids play in responses to social and ecological challenges.
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Affiliation(s)
- Allyson G King
- Department of Anthropology & Archaeology, University of Calgary, Calgary, AB T2N 1N4, Canada.
| | - Phoebe D Edwards
- Department of Psychology, University of Toronto Mississauga, Mississauga, ON L5L 1C6, Canada; Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada; Department of Ecology & Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada
| | - Susanne Cote
- Department of Anthropology & Archaeology, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Rupert Palme
- Department of Biomedical Sciences, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Rudy Boonstra
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, ON M1C 1A4, Canada; Department of Ecology & Evolutionary Biology, University of Toronto, Toronto, ON M5S 3B2, Canada
| | - Pascale Sicotte
- Department of Anthropology & Archaeology, University of Calgary, Calgary, AB T2N 1N4, Canada; Department of Biology, Concordia University, Montreal, QC H3G 1M8, Canada
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29
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Richards RL, Elderd BD, Duffy MA. Unhealthy herds and the predator–spreader: Understanding when predation increases disease incidence and prevalence. Ecol Evol 2023; 13:e9918. [PMID: 36969934 PMCID: PMC10037436 DOI: 10.1002/ece3.9918] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 02/14/2023] [Accepted: 03/05/2023] [Indexed: 03/26/2023] Open
Abstract
Disease ecologists now recognize the limitation behind examining host–parasite interactions in isolation: community members—especially predators—dramatically affect host–parasite dynamics. Although the initial paradigm was that predation should reduce disease in prey populations (“healthy herds hypothesis”), researchers have realized that predators sometimes increase disease in their prey. These “predator–spreaders” are now recognized as critical to disease dynamics, but empirical research on the topic remains fragmented. In a narrow sense, a “predator–spreader” would be defined as a predator that mechanically spreads parasites via feeding. However, predators affect their prey and, subsequently, disease transmission in many other ways such as altering prey population structure, behavior, and physiology. We review the existing evidence for these mechanisms and provide heuristics that incorporate features of the host, predator, parasite, and environment to understand whether or not a predator is likely to be a predator–spreader. We also provide guidance for targeted study of each mechanism and quantifying the effects of predators on parasitism in a way that yields more general insights into the factors that promote predator spreading. We aim to offer a better understanding of this important and underappreciated interaction and a path toward being able to predict how changes in predation will influence parasite dynamics.
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Affiliation(s)
- Robert L. Richards
- Department of Biological SciencesLouisiana State UniversityBaton RougeLouisianaUSA
| | - Bret D. Elderd
- Department of Biological SciencesLouisiana State UniversityBaton RougeLouisianaUSA
| | - Meghan A. Duffy
- Department of Ecology & Evolutionary BiologyUniversity of MichiganAnn ArborMichiganUSA
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30
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Santamaria F, Palme R, Schlagloth R. Discussion paper on 'Comparing the agreement of a commercial cortisol kit with a biologically validated assay in evaluating faecal cortisol metabolite levels in koala joeys'. Comp Biochem Physiol A Mol Integr Physiol 2023; 280:111416. [PMID: 36934868 DOI: 10.1016/j.cbpa.2023.111416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
Affiliation(s)
- Flavia Santamaria
- Koala Research-Central Queensland and Flora, Fauna and Freshwater Research Cluster, School of Health, Medical and Applied Sciences, Central Queensland University, North Rockhampton, QLD 4702, Australia.
| | - Rupert Palme
- Department of Biomedical Sciences, University of Veterinary Medicine, 1210 Vienna, Austria.
| | - Rolf Schlagloth
- Koala Research-Central Queensland and Flora, Fauna and Freshwater Research Cluster, School of Health, Medical and Applied Sciences, Central Queensland University, North Rockhampton, QLD 4702, Australia.
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31
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Součková M, Přibylová L, Jurčová L, Chaloupková H. Behavioural reactions of rabbits during AAI sessions. Appl Anim Behav Sci 2023. [DOI: 10.1016/j.applanim.2023.105908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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32
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Vogt A, König von Borstel U, Waiblinger S, Palme R, Barth K. Fecal cortisol metabolites reflect transport stress in 3-month-old dairy calves pre- and postweaning: A pilot study. J Dairy Sci 2023; 106:2124-2136. [PMID: 36631319 DOI: 10.3168/jds.2022-22341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Accepted: 09/29/2022] [Indexed: 01/10/2023]
Abstract
Measurement of fecal cortisol metabolites (FGCM) is a well-established, noninvasive method to assess stress in adult dairy cattle. However, this procedure has not yet been validated for unweaned dairy calves, and it can be expected that the milk proportion of the diet may influence the resulting FGCM concentrations. The aim of this study was therefore to assess whether a peak in FGCM concentrations in response to a stressor can be measured in unweaned dairy calves on a largely milk-based diet. If so, further objectives were to examine whether maximum FGCM concentrations, as well as the time lag until they are reached, are comparable to the values in the same calves on a solid-based diet after weaning. For this study, 5 German Holstein calves of about 3 mo of age (93 to 102 d preweaning) were exposed to a 45 min transport stressor once before and once after weaning, which was 3 wk apart. All voided fecal samples were collected for 24 h after termination of the transport. Fecal cortisol metabolites were analyzed with an 11-oxoetiocholanolone enzyme immunoassay and changes in FGCM concentrations relative to the individual baseline (FGCMrel) were calculated. Results showed a clear peak in FGCM concentrations on both diet types. The peak FGCMrel concentrations tended to be higher when the calves were on the preweaning diet (at peak: +233 ± 25% increase relative to baseline) in comparison to the postweaning diet (+124 ± 23%). Considering the whole 24 h sampling period, the FGCMrel concentrations for all calves were significantly higher on the preweaning diet than on the postweaning diet. There was also a numerical difference in the delay between occurrence of the stressor and appearance of the peak FGCMrel concentrations in feces, as the time lag was 1.5 ± 1.2 h longer when the calves were on the preweaning diet compared with the postweaning diet. In conclusion, our results suggest that FGCM concentrations are a useful stress marker for unweaned dairy calves in the same way they are for older cattle, but that FGCMrel concentrations tend to be higher in unweaned than in weaned calves and are thus not directly comparable.
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Affiliation(s)
- Anina Vogt
- Division of Animal Husbandry, Behaviour and Welfare, Justus Liebig University of Giessen, 35392 Giessen, Germany.
| | - Uta König von Borstel
- Division of Animal Husbandry, Behaviour and Welfare, Justus Liebig University of Giessen, 35392 Giessen, Germany
| | - Susanne Waiblinger
- Institute of Animal Welfare Science, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Rupert Palme
- Institute of Physiology, Pathophysiology and Experimental Endocrinology, University of Veterinary Medicine, 1210 Vienna, Austria
| | - Kerstin Barth
- Institute of Organic Farming, Johann Heinrich von Thünen Institute, Federal Research Institute for Rural Areas, Forestry and Fisheries, 23847 Westerau, Germany
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33
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Hariohay KM, Hunninck L, Ranke PS, Fyumagwa RD, Palme R, Røskaft E. Between hunter and climate: the effects of hunting and environmental change on fecal glucocorticoid metabolite levels in two sympatric ungulate species in the Ruaha-Rungwa ecosystem, Tanzania. CONSERVATION PHYSIOLOGY 2023; 11:coad002. [PMID: 38026801 PMCID: PMC10660377 DOI: 10.1093/conphys/coad002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 11/22/2022] [Accepted: 01/31/2023] [Indexed: 12/01/2023]
Abstract
Understanding the drivers of animal population decline is a key focus of conservation biologists. Anthropogenic activities such as hunting have long been established as potentially detrimental to a population's persistence. However, environmental perturbations such as increased temperature variability, exacerbated by climate change, can also have important effects on animal populations. Animals can respond to these challenges by adjusting both their behavior and physiology. We measured fecal glucocorticoid metabolites (FGMs) of common impala (Aepyceros melampus) and greater kudu (Tragelaphus strepsiceros), both currently in stable populations, to examine effects of hunting, forage availability, daily variability in temperature and group size on their physiological stress response. The study was conducted across two adjacent protected areas, (i) one non-hunted area (Ruaha National Park; RNP) and (ii) one area used for trophy hunting (Rungwa Game Reserve; RGR). Both impala and kudu had significantly higher FGM levels in the area that allows hunting, while FGM levels decreased with increasing forage availability and increasing daily temperature. Moreover, impala (but not kudu) had lower FGM levels with larger group sizes. Our results indicate that the management regime can significantly alter the physiological state of wild ungulate populations. We also highlight the importance of considering the combined effects of anthropogenic, environmental and social contexts when studying the stress response of wild populations. Our results emphasize the value of protected areas and continued monitoring of hunting quota in order to maintain ungulate populations that are less vulnerable to population declines.
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Affiliation(s)
- Kwaslema Malle Hariohay
- Department of Wildlife Management, College of African Wildlife Management, Mweka, P. O. Box 3031, Moshi, Tanzania
- Department of Biology, Norwegian University of Science and Technology, Realfagbygget, NO-7491, Trondheim, Norway
| | - Louis Hunninck
- Department of Biology, Norwegian University of Science and Technology, Realfagbygget, NO-7491, Trondheim, Norway
- Department of Natural Resources and Environmental Sciences, University of Illinois Urbana-Champaign, Urbana, IL 61801, USA
| | - Peter S Ranke
- Department of Biology, Norwegian University of Science and Technology, Realfagbygget, NO-7491, Trondheim, Norway
- Center for Biodiversity Dynamics (CBD), Department of Biology, Norwegian University of Science and Technology, Realfagbygget, NO-7491, Trondheim, Norway
| | - Robert D Fyumagwa
- Department of Wildlife Management, Tanzania Wildlife Research Institute (TAWIRI), P.O. Box 661, Arusha
| | - Rupert Palme
- Department of Biomedical Sciences, University of Veterinary Medicine, Vienna
| | - Eivin Røskaft
- Department of Biology, Norwegian University of Science and Technology, Realfagbygget, NO-7491, Trondheim, Norway
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Bu G, Lin Y, Liu J, Yu P, Yong T, Yang M, Huang L, Han X, Du X, Kong F, Huang A, Zeng X, Meng F. Evidence for progesterone acting as an inhibitor of stress axis via stimulating pituitary neuropeptide B/W receptor 2 (NPBWR2) expression in chickens. J Steroid Biochem Mol Biol 2023; 226:106218. [PMID: 36368625 DOI: 10.1016/j.jsbmb.2022.106218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/03/2022] [Accepted: 11/06/2022] [Indexed: 11/09/2022]
Abstract
In vertebrates, the hypothalamus-pituitary-adrenal gland (HPA) axis is the main endocrine pathway regulating the stress response, thus also called the stress axis. It has been well-accepted that the stress axis is tightly controlled by both hypothalamic stimulators and inhibitors [e.g. corticotropin (ACTH)-releasing inhibitory factor (CRIF)]. However, the identity of authentic CRIF remains unclear for decades. Recently, neuropeptide W (NPW) was proved to be the physiological CRIF in chickens. Together with its functional receptor (NPBWR2), they play critical roles in attenuating the activity of the chicken stress axis. Because increasing pieces of evidence suggested that sex steroids could regulate the stress axis, using chicken as a model, we investigated whether the newly identified CRIF and its receptor are under the control of sex steroids in this study. Our results showed that: (1) expression of NPW-NPBWR2 in the hypothalamus-pituitary axis was sexually dimorphic and developmental stage-dependent; (2) progesterone (P4), rather than 17β-estradiol (E2) and dihydrotestosterone (DHT), could dose- and time-dependently upregulate NPBWR2 expression, which was accompanied with the decrease of ACTH synthesis and secretion, in cultured pituitary cells; (3) intraperitoneal injection of P4 could elevate the mRNA level of pituitary NPBWR2; (4) P4-stimulated NPBWR2 expression was relevant to both nPR-mediated genomic action and mPRs-triggered nongenomic route associated with MEK/ERK, PI3K/AKT cascade, and calcium influx. To our knowledge, our results discover a novel route of sex steroids in modulating the stress axis of chickens, which lays a foundation to reveal the complicated interaction network between reproduction and stress axes in chickens.
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Affiliation(s)
- Guixian Bu
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China.
| | - Ying Lin
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Jianfeng Liu
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Pan Yu
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Tao Yong
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Ming Yang
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Linyan Huang
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Xingfa Han
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Xiaogang Du
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Fanli Kong
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Anqi Huang
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Xianyin Zeng
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China
| | - Fengyan Meng
- College of Life Science, Sichuan Agricultural University, Ya'an 625014, PR China.
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Santamaria F, Schlagloth R, Valenza L, Palme R, de Villiers D, Henning J. The Effect of Disease and Injury on Faecal Cortisol Metabolites, as an Indicator of Stress in Wild Hospitalised Koalas, Endangered Australian Marsupials. Vet Sci 2023; 10:vetsci10010065. [PMID: 36669066 PMCID: PMC9864655 DOI: 10.3390/vetsci10010065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 12/30/2022] [Accepted: 01/13/2023] [Indexed: 01/18/2023] Open
Abstract
Loss of habitat, urbanisation, climate change and its consequences are anthropogenic pressures that may cause stress in koalas. Non-invasive monitoring of faecal cortisol metabolites (FCMs) can be utilised to evaluate the impact of stressors. The aim was to determine if the tetrahydrocorticosterone (50c) and cortisol enzyme immunoassays (EIAs) could be effective in measuring FCM values in wild, stressed koalas. This research included 146 koalas from the Australia Zoo Wildlife Hospital (AZWH) and 88 from a study conducted by Endeavour Veterinary Ecology (EVE), Queensland, Australia. Faecal samples of diseased, injured and control koalas were analysed. The effect of hospitalisation on FCM values was also investigated. Diseased and injured koalas had significantly higher FCM values than clinically healthy control animals as measured by the 50c EIA. FCM values with the cortisol EIA differed significantly between control and diseased koalas, but not between control and injured ones. Moreover, only the 50c EIA detected higher absolute values in males compared to females, and also found that females showed a more elevated response to stress manifested by injury and disease compared to males. The 50c EIA detected stress during hospitalisation better than the cortisol EIA. The cortisol EIA was also found unreliable in detecting stress in rehabilitated koalas treated with synthetic glucocorticoids as it cross-reacts with these steroids providing artificially high values.
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Affiliation(s)
- Flavia Santamaria
- Koala Research-Central Queensland and Flora, Fauna and Freshwater Research Cluster, School of Health, Medical and Applied Sciences, Central Queensland University, North Rockhampton, QLD 4702, Australia
- Correspondence:
| | - Rolf Schlagloth
- Koala Research-Central Queensland and Flora, Fauna and Freshwater Research Cluster, School of Health, Medical and Applied Sciences, Central Queensland University, North Rockhampton, QLD 4702, Australia
| | | | - Rupert Palme
- Department of Biomedical Sciences, University of Veterinary Medicine, 1210 Vienna, Austria
| | | | - Joerg Henning
- School of Veterinary Science, The University of Queensland, Gatton, QLD 4343, Australia
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Driscoll MV, Tuttle AD, Romano TA. Fecal glucocorticoid analysis as a health monitoring tool for endangered African penguins (Spheniscus demersus). Gen Comp Endocrinol 2023; 330:114147. [PMID: 36272448 DOI: 10.1016/j.ygcen.2022.114147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 10/12/2022] [Accepted: 10/14/2022] [Indexed: 11/17/2022]
Abstract
African penguins (Spheniscus demersus) are an endangered species, with approximately 70,000 mature adults remaining in the wild. Population loss is linked to a combination of environmental and anthropogenic stressors. The aim of the study was to validate a commercially available enzyme immunoassay (EIA) to assess adrenal activity and measure the response to stressors in the feces of African penguins. Fecal samples (n = 609) were collected from 12 African penguins housed at Mystic Aquarium throughout their natural lifecycle, including breeding and molt, where measurable changes in fecal glucocorticoid metabolite (FGM) levels are predicted to occur. Fecal samples collected post-veterinary exam were used for biological validation. Longitudinal analysis shows a significant difference (p = <0.0001) between the average FGM levels during baseline and breeding season, 33.97 ± 1.30 ng/g and 50.21 ± 3.18 ng/g, respectively. Females displayed significantly higher FGM levels than males during both baseline (p = 0.0386; females = 38.80 ± 2.19 ng/g; males = 29.34 ± 1.37 ng/g) and breeding periods (p = 0.0175; females = 57.53 ± 4.84 ng/g; males = 42.69 ± 3.95 ng/g). Average FGM levels decreased significantly over the three-week molting period, from 85.40 ± 20.35 ng/g at week one to 20.23 ± 5.30 ng/g at week three. A seasonal difference in FGM levels was observed in both male and female fecal samples, with Fall having the highest average FGM levels, 54.38 ± 3.64 ng/g, and Summer the lowest, 30.87 ± 2.21 ng/g. General linear mixed model analysis determined that lifecycle (females) and visitor presence (males) were the two factors which best explained the variation in FGM levels observed, however neither factor was found to be significant. These results show FGM analysis can detect physiologically meaningful changes in endocrine activity in African penguins and can be used to monitor health for penguins in aquaria and in the wild, thus contributing to conservation efforts for the survival of the species.
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Affiliation(s)
- Maureen V Driscoll
- Sea Research Foundation Inc., d/b/a Mystic Aquarium, 55 Coogan Boulevard, Mystic, CT 06355, USA; University of Connecticut, Department of Marine Sciences, 1084 Shennecossett Road, Groton, CT 06340, USA.
| | - Allison D Tuttle
- Sea Research Foundation Inc., d/b/a Mystic Aquarium, 55 Coogan Boulevard, Mystic, CT 06355, USA
| | - Tracy A Romano
- Sea Research Foundation Inc., d/b/a Mystic Aquarium, 55 Coogan Boulevard, Mystic, CT 06355, USA; University of Connecticut, Department of Marine Sciences, 1084 Shennecossett Road, Groton, CT 06340, USA
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Karaer MC, Čebulj-Kadunc N, Snoj T. Stress in wildlife: comparison of the stress response among domestic, captive, and free-ranging animals. Front Vet Sci 2023; 10:1167016. [PMID: 37138925 PMCID: PMC10150102 DOI: 10.3389/fvets.2023.1167016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 03/30/2023] [Indexed: 05/05/2023] Open
Abstract
The stress response, which involves joint activity of the nervous and endocrine systems, is one of the basic adaptive mechanisms that ensures the survival of the individual. The activation of the sympathetic nervous system, the sympathetic-adrenal-medullary axis, and the hypothalamic-pituitary-adrenal axis enables organisms to respond to endogenous and exogenous challenges. Repeated short-term stress leads to long-term stress, which disrupts physiological homeostasis. Unlike domestic animals, wild animals are not protected from environmental and weather influences or treated for diseases. In addition, climate change, habitat fragmentation and loss, and urban stressors (such as light, noise and chemical pollution; xenobiotics; traffic; and buildings) affect individual wildlife and populations. In this review, we have attempted to depict the magnitude of the stress response in wildlife and related domestic animals as well as in captive and free-ranging animals. The intensity of the stress response can be estimated by determining the concentration of glucocorticoids in body fluids, tissues, and excreta. A comparison of results from different studies suggests that domestic animals have lower fecal and hair glucocorticoid concentrations than related wild animals. Additionally, fecal and hair glucocorticoid concentrations in captive animals are higher than in free-ranging animals of the same species. As there are limited data on this topic, we cannot draw definitive conclusions about glucocorticoid concentration and stress response. Further studies are needed to clarify these issues.
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Affiliation(s)
- Mina Cansu Karaer
- Food and Agriculture Vocational School, Çankiri Karatekin University, Çankiri, Türkiye
| | - Nina Čebulj-Kadunc
- Veterinary Faculty, Institute of Preclinical Sciences, University of Ljubljana, Gerbičeva, Ljubljana, Slovenia
| | - Tomaž Snoj
- Veterinary Faculty, Institute of Preclinical Sciences, University of Ljubljana, Gerbičeva, Ljubljana, Slovenia
- *Correspondence: Tomaž Snoj
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AOTA I, YATSUDA C, IZAWA EI. Salivary corticosterone measurement in large-billed crows by enzyme-linked immunosorbent assay. J Vet Med Sci 2023; 85:71-75. [PMID: 36418081 PMCID: PMC9887224 DOI: 10.1292/jvms.22-0383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Salivary corticosteroid measurement, as a surrogate for plasma corticosteroid levels to evaluate an animal's stress or metabolic state, commonly used in mammals. However, the validity of salivary corticosterone (CORT) measurements in birds has not yet been reported. We aimed to measure salivary CORT in crows using a commercially available CORT enzyme-linked immunosorbent assay kit. An adrenocorticotropic hormone (ACTH) challenge experiment using synthetic cosyntropin, an ACTH analogue, was conducted to compare CORT level elevations between the serum and the saliva in a 10-60 min range. Both salivary and blood CORT was significantly elevated 10 min after injecting synthetic cosyntropin. The results supported the validation of salivary CORT as a surrogate for a blood CORT in crows.
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Affiliation(s)
- Illia AOTA
- Department of Psychology, Keio University, Tokyo, Japan,Japan Society for Promotion of Science, Tokyo, Japan
| | | | - Ei-ichi IZAWA
- Department of Psychology, Keio University, Tokyo, Japan,Correspondence to: Izawa E: , Department of Psychology, Keio University, 2-15-45 Mita, Tokyo 108-8345, Japan
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Carbillet J, Hollain M, Rey B, Palme R, Pellerin M, Regis C, Geffré A, Duhayer J, Pardonnet S, Debias F, Merlet J, Lemaître JF, Verheyden H, Gilot-Fromont E. Age and spatio-temporal variations in food resources modulate stress-immunity relationships in three populations of wild roe deer. Gen Comp Endocrinol 2023; 330:114141. [PMID: 36272446 DOI: 10.1016/j.ygcen.2022.114141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 10/07/2022] [Accepted: 10/09/2022] [Indexed: 11/17/2022]
Abstract
Living in variable and unpredictable environments, organisms face recurrent stressful situations. The endocrine stress response, which includes the secretion of glucocorticoids, helps organisms to cope with these perturbations. Although short-term elevations of glucocorticoid levels are often associated with immediate beneficial consequences for individuals, long-term glucocorticoid elevation can compromise key physiological functions such as immunity. While laboratory works highlighted the immunosuppressive effect of long-term elevated glucocorticoids, it remains largely unknown, especially in wild animals, whether this relationship is modulated by individual and environmental characteristics. In this study, we explored the co-variation between integrated cortisol levels, assessed non-invasively using faecal cortisol metabolites (FCMs), and 12 constitutive indices of innate, inflammatory, and adaptive immune functions, in wild roe deer living in three populations with previously known contrasting environmental conditions. Using longitudinal data on 564 individuals, we further investigated whether age and spatio-temporal variations in the quantity and quality of food resources modulate the relationship between FCMs and immunity. Negative covariation with glucocorticoids was evident only for innate and inflammatory markers of immunity, while adaptive immunity appeared to be positively or not linked to glucocorticoids. In addition, the negative covariations were generally stronger in individuals facing harsh environmental constraints and in old individuals. Therefore, our results highlight the importance of measuring multiple immune markers of immunity in individuals from contrasted environments to unravel the complex relationships between glucocorticoids and immunity in wild animals. Our results also help explain conflicting results found in the literature and could improve our understanding of the link between elevated glucocorticoid levels and disease spread, and its consequences on population dynamics.
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Affiliation(s)
- Jeffrey Carbillet
- Université de Toulouse, INRAE, CEFS, Castanet Tolosan, 31326, France; LTSER ZA PYRénées GARonne, Auzeville-Tolosane, 31320, France; Université de Lyon, VetAgro Sup, Marcy-l'Etoile, 69280, France; Institute of Ecology and Earth Sciences, University of Tartu, Tartu 51014, Estonia.
| | - Marine Hollain
- Université de Lyon, Université Lyon 1, UMR CNRS 5558, Villeurbanne Cedex 69100, France; Office Français de la biodiversité, Direction de la Recherche et de l'Appui Scientifique, Service Conservation et Gestion Durable des Espèces Exploitées, Chateauvillain 52210, France
| | - Benjamin Rey
- Université de Lyon, Université Lyon 1, UMR CNRS 5558, Villeurbanne Cedex 69100, France
| | - Rupert Palme
- Unit of Physiology, Pathophysiology, and Experimental Endocrinology, Department of Biomedical Sciences, University of Veterinary Medicine, Vienna 1210, Austria
| | - Maryline Pellerin
- Office Français de la biodiversité, Direction de la Recherche et de l'Appui Scientifique, Service Conservation et Gestion Durable des Espèces Exploitées, Chateauvillain 52210, France
| | - Corinne Regis
- Université de Lyon, Université Lyon 1, UMR CNRS 5558, Villeurbanne Cedex 69100, France
| | - Anne Geffré
- Equipe de Biologie médicale-Histologie, CREFRE, Inserm-UPS-ENVT, Toulouse 31000, France
| | - Jeanne Duhayer
- Université de Lyon, Université Lyon 1, UMR CNRS 5558, Villeurbanne Cedex 69100, France
| | - Sylvia Pardonnet
- Université de Lyon, Université Lyon 1, UMR CNRS 5558, Villeurbanne Cedex 69100, France
| | - François Debias
- Université de Lyon, Université Lyon 1, UMR CNRS 5558, Villeurbanne Cedex 69100, France
| | - Joël Merlet
- Université de Toulouse, INRAE, CEFS, Castanet Tolosan, 31326, France; LTSER ZA PYRénées GARonne, Auzeville-Tolosane, 31320, France
| | | | - Hélène Verheyden
- Université de Toulouse, INRAE, CEFS, Castanet Tolosan, 31326, France; LTSER ZA PYRénées GARonne, Auzeville-Tolosane, 31320, France
| | - Emmanuelle Gilot-Fromont
- Université de Lyon, VetAgro Sup, Marcy-l'Etoile, 69280, France; Université de Lyon, Université Lyon 1, UMR CNRS 5558, Villeurbanne Cedex 69100, France
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Kothmann KH, Jons A, Wilhelmi B, Kasozi N, Graham L, Gent R, Atkin SL, Swart AC, Newell-Fugate AE. Non-invasive assessment of fecal glucocorticoid, progesterone, and androgen metabolites and microbiome in free-ranging southern white rhinoceros (Ceratotherium simum simum) in South Africa. Gen Comp Endocrinol 2022; 329:114099. [PMID: 35914652 DOI: 10.1016/j.ygcen.2022.114099] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 07/14/2022] [Accepted: 07/26/2022] [Indexed: 11/04/2022]
Abstract
Increased poaching in northern South Africa has necessitated relocation of large numbers of southern white rhinoceros (Ceratotherium simum simum) to the Eastern Cape Province. The climate and grassland ecology of this province differ from that of northern South Africa which may impact the health of this species. This assessment of fecal steroid levels and microbiome in 10 free-ranging southern white rhinoceros in the Eastern Cape will provide insights into white rhinoceros physiology in this biome. Fecal steroid metabolites were analyzed using enzyme immunoassay (EIA) and ultra-performance convergence chromatography tandem mass spectrometry (UPC2-MS/MS). Fecal microbial composition was assessed via next generation sequencing. EIAs with antibodies raised against progesterone (P4; mouse monoclonal - CL425 clone), testosterone (T; rabbit polyclonal), corticosterone (B; sheep polyclonal) were utilized. Pregnant females had large quantities of fecal progesterone metabolites (FPMs) detected by CL425 EIA. Pregnant females also had native P4 and 11α-hydroxydihydroprogesterone (11αOHDHP4; 4-pregnen-11α-ol-3,20-dione) detected by UPC2-MS/MS but these concentrations were 1000-fold less than the concentrations of FPMs detected by the CL425 EIA. By contrast, non-pregnant females had FPM concentrations detected by CL425 EIA which were similar to native P4 and 11αOHDHP4 concentrations detected by UPC2-MS/MS. Mean fecal androgen metabolite (FAM) concentrations detected by the T EIA were similar between males and females. 11-ketoandrostenedione (11KA4) detected by UPC2-MS/MS was higher in females than males. However, there was no difference between males and females in the concentration of fecal glucocorticoid metabolites (FGMs) detected by the B EIA. Bacteroidia, followed by Clostridia, was the most abundant classes of fecal microbes. The unfiltered microbiome of females was more diverse than that of males. The core fecal microbiome of young rhinoceros had a higher observed species richness (Shannon diversity index, and Simpson diversity index) than that of old rhinoceros. In the alpha male, immobilization was associated with an increase in FGMs detected by 11-deoxycortisol (S) detected by UPC2-MS/MS coupled with decreased abundance of Spirochaetia. We detected substantially different FAM and FPM concentrations from those previously reported for both captive and wild white rhinoceros. Comparison of our UPC2-MS/MS and EIA results underscores the fact that most EIAs are highly cross reactive for many steroid metabolites. Our data also demonstrates a distinct effect of stress not only on FGMs but also on the fecal microbiome. This is the first non-invasive assessment of fecal steroid metabolites by UPC2-MS/MS and the fecal microbiome in wild white rhinoceros.
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Affiliation(s)
- K H Kothmann
- Department of Veterinary Physiology and Pharmacology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA
| | - A Jons
- Department of Molecular and Cellular Medicine, Health Science Center, Texas A&M University, College Station, TX 77843, USA
| | - B Wilhelmi
- Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140 South Africa
| | - N Kasozi
- Department of Biochemistry and Microbiology, Rhodes University, Grahamstown, 6140 South Africa
| | - L Graham
- Ikahala Veterinary Wildlife Services, Paterson 6131 South Africa
| | - R Gent
- Department of Biochemistry, Stellenbosch University, Stellenbosch 7600 South Africa
| | - S L Atkin
- Royal College of Surgeons in Ireland, Bahrain
| | - A C Swart
- Department of Biochemistry, Stellenbosch University, Stellenbosch 7600 South Africa; Department of Chemistry and Polymer Science, Stellenbosch University, Stellenbosch 7600 South Africa
| | - A E Newell-Fugate
- Department of Veterinary Physiology and Pharmacology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX 77843, USA.
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Radical A, Normando S, Ponzio P, Bono L, Macchi E. The effects of the addition of two environmental enrichments on the behavior and fecal cortisol levels of three small felids species (Caracal caracal, Leptailurus serval, Leopardus pardalis) in captivity. J Vet Behav 2022. [DOI: 10.1016/j.jveb.2022.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Bottini CLJ, Whiley RE, Branfireun BA, MacDougall-Shackleton SA. Effects of methylmercury and food stress on migratory activity in song sparrows, Melospiza melodia. Horm Behav 2022; 146:105261. [PMID: 36126358 DOI: 10.1016/j.yhbeh.2022.105261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 09/01/2022] [Accepted: 09/03/2022] [Indexed: 11/25/2022]
Abstract
Avian migration is a challenging life stage susceptible to the adverse effects of stressors, including contaminants like methylmercury (MeHg). Although birds often experience stressors and contaminants concurrently in the wild, no study to date has investigated how simultaneous exposure to MeHg and food stress affects migratory behavior. Our objectives were to determine if MeHg or food stress exposure during summer, alone or combined, has carry-over effects on autumn migratory activity, and if hormone levels (corticosterone, thyroxine) and body condition were related to these effects. We tested how exposure to dietary MeHg and/or food stress (unpredictable temporary food removal) affected migratory behavior in captive song sparrows, Melospiza melodia. Nocturnal activity was influenced by a 3-way interaction between MeHg × stress × nights of the study, indicating that activity changed over time in different ways depending on prior treatments. Thyroxine was not affected by treatment or sampling date. During the migratory season, fecal corticosterone metabolite concentrations increased in birds co-exposed to MeHg and food stress compared to controls, suggesting an additive carry-over effect. As well, during the period of behavioral recording, body condition increased with time in unstressed birds, but not in stressed birds. Fecal corticosterone metabolite concentrations were positively correlated to duration of nocturnal activity, but thyroxine levels and body condition were not. The differences in nocturnal activity between groups suggest that food stress and MeHg exposure on breeding grounds could have direct and indirect carry-over effects that have the potential to affect the fall migration journey.
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Affiliation(s)
- Claire L J Bottini
- University of Western Ontario, Department of Biology, 1151 Richmond St., London, Ontario N6A 5B7, Canada; Advanced Facility for Avian Research, University of Western Ontario, London, Ontario, Canada.
| | - Rebecca E Whiley
- University of Western Ontario, Department of Biology, 1151 Richmond St., London, Ontario N6A 5B7, Canada; Advanced Facility for Avian Research, University of Western Ontario, London, Ontario, Canada
| | - Brian A Branfireun
- University of Western Ontario, Department of Biology, 1151 Richmond St., London, Ontario N6A 5B7, Canada
| | - Scott A MacDougall-Shackleton
- Advanced Facility for Avian Research, University of Western Ontario, London, Ontario, Canada; University of Western Ontario, Department of Psychology, 1151 Richmond St., London, Ontario N6A 5C2, Canada
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Dam (Canis familiaris) Welfare throughout the Peri-Parturient Period in Commercial Breeding Kennels. Animals (Basel) 2022; 12:ani12202820. [PMID: 36290206 PMCID: PMC9597717 DOI: 10.3390/ani12202820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/07/2022] [Accepted: 10/10/2022] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Welfare problems experienced during gestation and lactation may negatively affect dams and their puppies. However, the welfare states of dams in commercial breeding (CB) kennels during this period have not been well examined. Therefore, we examined a range of behavioral, physical, and physiological metrics throughout the period around parturition to identify if changes indicative of impaired welfare were present. We tested 74 dams from eight CB kennels at 6 and 1 week prepartum, and 4 and 8 weeks postpartum. At each time point we measured their responses to a stranger approaching, their physical health, and indicators of their stress response, immune function, and parasite burden. Findings did not reveal major changes in dam welfare. Most changes observed were likely because of natural biological changes resulting from pregnancy, lactation, and weaning. However, as some changes in metrics deviated from what was expected and there were changes in environmental and management factors during this time, future research should identify how they affect dam welfare. Abstract Poor dam welfare throughout the peri-parturient period can also negatively affect that of their offspring. This study aimed to identify changes in physical, physiological, and behavioral metrics indicative of dam welfare throughout the peri-parturient period. Dams (n = 74) from eight U.S. Midwest commercial breeding (CB) kennels were tested at 6 and 1 week prepartum, and 4 and 8 weeks postpartum. At each time point dams underwent a stranger approach test, physical health assessment, hair collection for hair cortisol concentration (HCC) and fecal collection for fecal glucocorticoid metabolites (FGM), fecal secretory immunoglobulin A (sIgA) and parasite detection. Linear mixed-effects models indicated dams exhibited more affiliative behaviors towards the stranger at 4 weeks postpartum than 6 weeks prepartum (p = 0.03), increased HCC from 4-weeks to 8 weeks postpartum (p = 0.02), and increased FGM from 1 week prepartum to 8 weeks postpartum (p = 0.04). At each respective time point, the percentage of dams with intestinal parasites was 11%, 4%, 23%, and 15%. Most changes are likely due to increased energy requirements and hormonal variations. However, deviations from expected changes may have resulted from changes in environment and/ or management, which should be explored in future studies.
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Edwards MJ, Stanley CR, Hosie CA, Richdon S, Price E, Wormell D, Smith TE. Social roles influence cortisol levels in captive Livingstone's fruit bats (Pteropus livingstonii). Horm Behav 2022; 144:105228. [PMID: 35772196 DOI: 10.1016/j.yhbeh.2022.105228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 05/03/2022] [Accepted: 06/21/2022] [Indexed: 11/16/2022]
Abstract
A critical component of conserving and housing species ex situ is an explicit scientific understanding of the physiological underpinnings of their welfare. Cortisol has been repeatedly linked to stress, and therefore used as an indicator of welfare for many species. In order to measure cortisol in the Livingstone's fruit bat (Pteropus livingstonii; a critically endangered keystone species) without disturbing the captive population, we have developed and validated a non-invasive, novel hormone extraction procedure and faecal glucocorticoid assay. A total of 92 faecal samples, 73 from the P. livingstonii breeding colony at Jersey Zoo, Channel Islands and 19 samples from P. livingstonii housed at Bristol Zoological Gardens, UK, have been collected and analyzed. Mixed-effect modelling of the influence of physiological state variables on cortisol concentration revealed that lactating females had higher cortisol levels than non-lactating females, indicating that our assay is measuring biologically relevant hormone concentrations. Males and older bats also had higher cortisol than non-lactating females and younger individuals. Further analysis applied social network methodology to compare the cortisol levels of bats with different social roles. We found that individuals that linked social groups possessed higher than average cortisol levels and conversely, individuals with high-quality, positive relationships had lower cortisol levels. These results demonstrate, for the first time in a bat species, social mediation of stress hormones. Lastly, the frequency of vocalisation was found to positively correlate with cortisol concentration in males, suggesting that this behaviour may be used by animal management as a visual indicator of a bat's hormonal status. Hence, this research has provided unique insights and empirical scientific knowledge regarding the relationship between the physiology and social behaviour of P. livingstonii, therefore allowing for recommendations to be made to optimise bat welfare at the individual level.
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Affiliation(s)
- Morgan J Edwards
- Animal Behaviour and Welfare Research Group, Department of Biological Sciences, University of Chester, Chester CH1 4BJ, UK.
| | - Christina R Stanley
- Animal Behaviour and Welfare Research Group, Department of Biological Sciences, University of Chester, Chester CH1 4BJ, UK.
| | - Charlotte A Hosie
- Animal Behaviour and Welfare Research Group, Department of Biological Sciences, University of Chester, Chester CH1 4BJ, UK.
| | - Sarah Richdon
- Institute of Conservation Science & Learning, Bristol Zoological Society, Clifton, Bristol BS8 3HA, UK.
| | - Eluned Price
- Durrell Wildlife Conservation Trust, Trinity, Jersey JE3 6AP, UK.
| | - Dominic Wormell
- Durrell Wildlife Conservation Trust, Trinity, Jersey JE3 6AP, UK.
| | - Tessa E Smith
- Animal Behaviour and Welfare Research Group, Department of Biological Sciences, University of Chester, Chester CH1 4BJ, UK.
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Roffler GH, Karpovich S, Charapata P, Keogh MJ. Validation and measurement of physiological stress and reproductive hormones in wolf hair and claws. WILDLIFE SOC B 2022. [DOI: 10.1002/wsb.1330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gretchen H. Roffler
- Alaska Department of Fish and Game Division of Wildlife Conservation 801 3rd Street Douglas AK 99824 USA
| | - Shawna Karpovich
- Alaska Department of Fish and Game Division of Wildlife Conservation 1300 College, Road Fairbanks AK 99701 USA
| | - Patrick Charapata
- Alaska Department of Fish and Game Division of Wildlife Conservation 1300 College, Road Fairbanks AK 99701 USA
| | - Mandy J. Keogh
- Alaska Department of Fish and Game Division of Wildlife Conservation 801 3rd Street Douglas AK 99824 USA
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Cope HR, Keeley T, Keong J, Smith D, Silva FRO, McArthur C, Webster KN, Mella VSA, Herbert CA. Validation of an Enzyme Immunoassay to Measure Faecal Glucocorticoid Metabolites in Common Brushtail Possums (Trichosurus vulpecula) to Evaluate Responses to Rehabilitation. Animals (Basel) 2022; 12:ani12131627. [PMID: 35804526 PMCID: PMC9265043 DOI: 10.3390/ani12131627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 06/21/2022] [Accepted: 06/22/2022] [Indexed: 11/19/2022] Open
Abstract
Simple Summary Little is known about how exposure to novel stimuli during rescue and rehabilitation could affect the physiology of native wildlife. We investigated this question in a species commonly rescued for rehabilitation, the common brushtail possum (Trichosurus vulpecula). Glucocorticoids (major hormones involved in stress responses) are metabolised in the body and excreted in the form of faecal glucocorticoid metabolites, which can be measured as a way of evaluating the response of animals to potential stressors. Comparing five enzyme immunoassay options, we found that the 11-oxoaetiocholanolone (abbreviation: 72a) EIA was the most suitable for measuring these metabolites in brushtail possums. This assay was then used to measure faecal glucocorticoid metabolite concentrations in 20 possums during rehabilitation. The probability of a physiological “stress” response occurring within five days of a potentially stressful event was about 50%, regardless of the type of event. There was a high level of variation in hormone profiles between possums. Our study has demonstrated that injured and orphaned possums show detectable changes in faecal glucocorticoid metabolites during captivity and rehabilitation, and has identified events that can induce a physiological response in some individuals. This is the first step toward understanding the relationship between these responses during rehabilitation and survival. Abstract Volunteer wildlife rehabilitators rescue and rehabilitate thousands of native animals every year in Australia. However, there is little known about how exposure to novel stimuli during rehabilitation could affect the physiology of wildlife. We investigated this question in a species that commonly enters rehabilitation, the common brushtail possum (Trichosurus vulpecula). We evaluated five enzyme immunoassays (EIA) to determine the most suitable for measuring faecal glucocorticoid metabolites (FGM) as a proxy for evaluating the response of brushtail possums to potential stressors during rehabilitation. An adrenocorticotrophin hormone (ACTH) challenge was conducted on wild-caught possums to determine the best-performing EIA based on the successful detection of FGM peaks in at least two of three possums. While a number of assays met these criteria, the 11-oxoaetiocholanolone (abbreviation: 72a) EIA was selected as it had the largest amplitude of change in response to the ACTH challenge. This assay was then used to measure FGM concentrations in 20 possums during rehabilitation. There was high variation in baseline FGM concentrations and response to captivity between possums. Significant changes in FGM levels were detected in most possums during captivity, but were not reliably associated with potentially stressful events that were identified by rehabilitators. The probability of an FGM peak occurring within five days of a potentially stressful event was about 50%, regardless of the type of event. Our study has demonstrated that injured and orphaned possums show changes in FGMs during captivity and rehabilitation and has identified events that can induce a physiological response in some individuals. We recommend that research now focus on the relationship between these responses during rehabilitation and pre- and post-release survival.
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Affiliation(s)
- Holly R. Cope
- Sydney School of Veterinary Science, University of Sydney, Camperdown, NSW 2006, Australia;
- Correspondence:
| | - Tamara Keeley
- School of Agriculture and Food Sciences, University of Queensland, Gatton, QLD 4343, Australia;
| | - Joy Keong
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia; (J.K.); (D.S.); (F.R.O.S.); (C.M.); (C.A.H.)
| | - Daniel Smith
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia; (J.K.); (D.S.); (F.R.O.S.); (C.M.); (C.A.H.)
| | - Fabiola R. O. Silva
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia; (J.K.); (D.S.); (F.R.O.S.); (C.M.); (C.A.H.)
| | - Clare McArthur
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia; (J.K.); (D.S.); (F.R.O.S.); (C.M.); (C.A.H.)
| | - Koa N. Webster
- Department of Biological Sciences, Macquarie University, North Ryde, NSW 2109, Australia;
| | - Valentina S. A. Mella
- Sydney School of Veterinary Science, University of Sydney, Camperdown, NSW 2006, Australia;
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia; (J.K.); (D.S.); (F.R.O.S.); (C.M.); (C.A.H.)
| | - Catherine A. Herbert
- School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia; (J.K.); (D.S.); (F.R.O.S.); (C.M.); (C.A.H.)
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Brandl HB, Pruessner JC, Farine DR. The social transmission of stress in animal collectives. Proc Biol Sci 2022; 289:20212158. [PMID: 35538776 PMCID: PMC9091854 DOI: 10.1098/rspb.2021.2158] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 03/18/2022] [Indexed: 01/04/2023] Open
Abstract
The stress systems are powerful mediators between the organism's systemic dynamic equilibrium and changes in its environment beyond the level of anticipated fluctuations. Over- or under-activation of the stress systems' responses can impact an animal's health, survival and reproductive success. While physiological stress responses and their influence on behaviour and performance are well understood at the individual level, it remains largely unknown whether-and how-stressed individuals can affect the stress systems of other group members, and consequently their collective behaviour. Stressed individuals could directly signal the presence of a stressor (e.g. via an alarm call or pheromones), or an acute or chronic activation of the stress systems could be perceived by others (as an indirect cue) and spread via social contagion. Such social transmission of stress responses could then amplify the effects of stressors by impacting social interactions, social dynamics and the collective performance of groups. As the neuroendocrine pathways of the stress response are highly conserved among vertebrates, transmission of physiological stress states could be more widespread among non-human animals than previously thought. We therefore suggest that identifying the extent to which stress transmission modulates animal collectives represents an important research avenue.
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Affiliation(s)
- Hanja B. Brandl
- Centre for the Advanced Study of Collective Behaviour, University of Konstanz, 78457 Konstanz, Germany
- Department of Collective Behaviour, Max Planck Institute of Animal Behavior, 78457 Konstanz, Germany
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland
| | - Jens C. Pruessner
- Centre for the Advanced Study of Collective Behaviour, University of Konstanz, 78457 Konstanz, Germany
- Department of Psychology, University of Konstanz, 78457 Konstanz, Germany
| | - Damien R. Farine
- Centre for the Advanced Study of Collective Behaviour, University of Konstanz, 78457 Konstanz, Germany
- Department of Collective Behaviour, Max Planck Institute of Animal Behavior, 78457 Konstanz, Germany
- Department of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland
- Division of Ecology and Evolution, Research School of Biology, Australian National University, Canberra, ACT 2600, Australia
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Fecal Glucocorticoid Metabolites as a Noninvasive Indicator of Stress in the Tsushima Leopard Cats (Prionailurus bengalensis euptilurus): Application to Health Care. Animals (Basel) 2022; 12:ani12091072. [PMID: 35565499 PMCID: PMC9102420 DOI: 10.3390/ani12091072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 04/15/2022] [Accepted: 04/19/2022] [Indexed: 11/16/2022] Open
Abstract
Simple Summary The Tsushima leopard cat (Prionailurus bengalensis euptilurus) and the Iriomote cat (P. b. iriomotensis) are the only two wild felids living in Japan. Both species are endangered. The Tsushima leopard cat is undergoing captive breeding (ex situ conservation) in zoos with the aim of returning it to the wild, in addition to conservation activities in the habitat (in situ conservation). In order to promote captive breeding, it is important to elucidate the reproductive physiology and to evaluate stress conditions. We investigated the possibility of measuring glucocorticoid metabolites (GCMs), which are stress hormones, using feces in Tsushima leopard cats. We examined changes in fecal GCM in individuals who underwent a health examination under anesthesia as an unavoidable stressful condition during normal health care. Fecal GCM concentrations increased 1–2 days after the health examination. Fecal GCM concentrations were higher in diseased individuals than in apparently healthy individuals. Individuals diagnosed with disk herniation also showed a decrease in fecal GCM concentrations after treatment with therapeutics. These results indicate that the measurement of fecal GCMs is useful for improving the husbandry and health management of the Tsushima leopard cat. Abstract This study investigates whether the measurement of glucocorticoid metabolites (GCMs) in feces is a useful method for the noninvasive evaluation of stress in the endangered Tsushima leopard cats (Prionailurus bengalensis euptilurus). Feces were collected from six seemingly healthy and five diseased (renal dysfunction, adrenal tumor, hernia, feline immunodeficiency virus (FIV), feline leukemia virus (FeLV)) Tsushima leopard cats in captivity. Fecal GCMs were measured by enzyme immunoassay (EIA) for cortisol. Individuals that experienced a physical examination under anesthesia showed increased fecal GCMs 1–2 days after the event. An individual diagnosed with disk herniation showed decreased fecal GCMs after medical administration. The mean fecal GCM concentrations for six healthy animals and five diseased animals were 0.66 ± 0.08 and 2.65 ± 0.76 μg/g, respectively, which was significantly different. Cortisol and corticosterone were not clearly detected in the feces examined by the use of the HPLC-EIA analysis. GCMs may be excreted in the feces; however, the exact identification of these substances is not achieved. The results suggest that the measurement of fecal GCMs is useful for the husbandry and health management of this species.
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Donini V, Iacona E, Pedrotti L, Macho-Maschler S, Palme R, Corlatti L. Temporal stability of fecal cortisol metabolites in mountain-dwelling ungulates. Naturwissenschaften 2022; 109:20. [PMID: 35325316 PMCID: PMC8948117 DOI: 10.1007/s00114-022-01792-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 11/27/2022]
Abstract
Fecal cortisol metabolites (FCMs) are widely used to track stress responses in wildlife and captive species. Rules of thumb suggest that samples should be collected as soon as possible after defecation, to avoid decay of FCMs. To date, however, only a few studies investigated the stability of defecated FCMs over time, and most of them were conducted in controlled laboratory conditions. Here, we investigated the stability of FCMs over seven consecutive days, in two mountain-dwelling ungulates, under natural environmental conditions using a semi-experimental approach. Fecal samples from Northern chamois Rupicapra rupicapra (n = 24) and red deer Cervus elaphus (n = 22) were collected in summer of 2020 within the Stelvio National Park, Italy, and placed in an open area above 2000 m a.s.l. For the next 7 days, we collected a portion of each sample, and all sub-samples were analyzed with an 11-oxoetiocholanolone enzyme immunoassay. Exposure, temperature, and precipitation were fitted as covariates in non-linear generalized mixed models to assess FCM variation over time, and competing models were selected using AICc. For chamois, the best model included only time as a predictor, while for red deer, it included time, precipitation, and exposure. For both species, FCM values decreased rapidly from the first days after deposition until the fourth day. For red deer, in northern-exposed samples, FCM values decreased slower than in south-exposed ones; furthermore, FCM values increased with increasing precipitation. Our results offer a solid methodological basis to wildlife researchers and practitioners interested in the investigation of the ecological factors affecting stress variation in wildlife and support the recommendation to collect samples as fresh as possible, to avoid misleading inference. Further studies are necessary to evaluate the stability of FCMs when other enzyme immunoassays are used.
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Affiliation(s)
- Valerio Donini
- Stelvio National Park - ERSAF Lombardia, Via De Simoni 42, 23032, Bormio, Italy
| | - Elisa Iacona
- Stelvio National Park - ERSAF Lombardia, Via De Simoni 42, 23032, Bormio, Italy
| | - Luca Pedrotti
- Stelvio National Park - ERSAF Lombardia, Via De Simoni 42, 23032, Bormio, Italy
- Stelvio National Park - Autonomous Province of Trento, Via Roma 65, 38024, Cogolo di Peio, Italy
| | - Sabine Macho-Maschler
- Department of Biomedical Sciences, Unit of Physiology, Pathophysiology and Experimental Endocrinology, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Rupert Palme
- Department of Biomedical Sciences, Unit of Physiology, Pathophysiology and Experimental Endocrinology, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210, Vienna, Austria
| | - Luca Corlatti
- Stelvio National Park - ERSAF Lombardia, Via De Simoni 42, 23032, Bormio, Italy.
- Chair of Wildlife Ecology and Management, University of Freiburg, Tennenbacher Straße 4, 79106, Freiburg, Germany.
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The Adrenal Cortisol Response to Increasing Ambient Temperature in Polar Bears ( Ursus maritimus). Animals (Basel) 2022; 12:ani12060672. [PMID: 35327071 PMCID: PMC8944560 DOI: 10.3390/ani12060672] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/28/2022] [Accepted: 03/04/2022] [Indexed: 02/01/2023] Open
Abstract
Our objective was to identify the upper ambient temperature threshold that triggers an increase in cortisol in response to increased thermoregulatory demands in polar bears. The results reported here include endocrine data collected over two years from 25 polar bears housed in 11 accredited zoological institutions across North America. The effects of ambient temperature, sex, age group (juvenile, adult, elderly), breeding season and humidity on fecal cortisol metabolite (FCM) concentrations (N = 8439 samples) were evaluated using linear mixed models. Ambient temperatures were placed into five different categories: <5 °C, 6−10 °C, 11−15 °C, 16−20 °C, and >20 °C. Ambient temperature and humidity had a significant (p < 0.05) effect on FCM concentrations with significant (p < 0.05) interactions of sex, age and breeding season. Once biotic factors were accounted for, there was a significant (p < 0.05) increase in FCM concentrations associated with ambient temperatures above 20 °C in adult polar bears. The implications of these findings for the management of both zoo and wild polar bears are discussed.
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