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Kankaynar M, Ceyhun HA, Baran A, Sulukan E, Yildirim S, Bolat İ, Toraman E, Nadaroglu H, Arslan M, Ceyhun SB. The anxiolytic and circadian regulatory effect of agarwood water extract and its effects on the next generation; zebrafish modelling. Comp Biochem Physiol C Toxicol Pharmacol 2023; 269:109621. [PMID: 37023882 DOI: 10.1016/j.cbpc.2023.109621] [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: 03/10/2023] [Revised: 03/24/2023] [Accepted: 03/29/2023] [Indexed: 04/08/2023]
Abstract
Anxiety is one of the most common psychiatric symptoms worldwide. Studies show that there is an increase of >25 % in the prevalence of anxiety with the onset of the COVID-19 pandemic process. Due to the various side effects of drugs used in the treatment of anxiety, interest in natural therapeutic alternatives has increased. Agarwood is a plant used as a natural therapeutic due to its sedative effect as well as many effects such as antioxidant and antibacterial. Although there are many studies with agarwood, comprehensive behavioral studies, including the next generation, are limited. In present study, zebrafish fed with diets containing 10-100 ppm water extract of Agarwood (AWE) for 3 and 8 weeks were exposed to predator stress using Oscar fish in order to test the potential anxiolytic effect of AWE. At the end of the period, zebrafish exposed to predator stress were subjected to anxiety and circadian tests. Histopathological evaluation and immunofluorescent analyzes of BDNF and 5HT4-R proteins were performed in the brains of zebrafish. The effects on the next generation were examined by taking offspring from zebrafish. According to the results, it was observed that AWE had a healing effect on anxiety-like behaviors and on the disrupted circadian rhythm triggered by the predatory stress it applied, especially in the 8 weeks 100 ppm group. Interestingly, it was also found to be effective in offspring of zebrafish fed diets with AWE.
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Affiliation(s)
- Meryem Kankaynar
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey
| | - Hacer Akgül Ceyhun
- Department of Psychiatry, Faculty of Medicine, Atatürk University, Erzurum, Turkey
| | - Alper Baran
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Food Quality Control and Analysis, Technical Vocational School, Atatürk University, Erzurum, Turkey
| | - Ekrem Sulukan
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Aquaculture Department, Fisheries Faculty, Atatürk University, Erzurum, Turkey
| | - Serkan Yildirim
- Department of Pathology, Faculty of Veterinary, Atatürk University, Erzurum, Turkey
| | - İsmail Bolat
- Department of Pathology, Faculty of Veterinary, Atatürk University, Erzurum, Turkey
| | - Emine Toraman
- Department of Molecular Biology and Genetics, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Hayrunnisa Nadaroglu
- Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey; Department of Food Technology, Technical Vocational School, Atatürk University, Erzurum, Turkey
| | - Murat Arslan
- Aquaculture Department, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Aquaculture Engineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey
| | - Saltuk Buğrahan Ceyhun
- Aquatic Biotechnology Laboratory, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Nanoscience and Nanoengineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey; Aquaculture Department, Fisheries Faculty, Atatürk University, Erzurum, Turkey; Department of Aquaculture Engineering, Graduate School of Natural and Applied Science, Atatürk University, Erzurum, Turkey.
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2
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Lucas J, Logeux V, Rodrigues AMS, Stien D, Lebaron P. Exposure to four chemical UV filters through contaminated sediment: impact on survival, hatching success, cardiac frequency, and aerobic metabolic scope in embryo-larval stage of zebrafish. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:29412-29420. [PMID: 33555472 DOI: 10.1007/s11356-021-12582-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 01/18/2021] [Indexed: 06/12/2023]
Abstract
UV filters are widely used in many pharmaceutical and personal care products such as sunscreen and cosmetics to protect from UV irradiation. Due to their hydrophobic properties and relative stability, they have a high capacity to accumulate in sediment. Little information is available on their ecotoxicity on fish. In aquatic ecosystems, fish eggs could be directly affected by UV filters through contact with contaminated sediment. The aim of this study was to investigate the individual toxicity of four UV filters: benzophenone-3 (BP3), butyl methoxydibenzoylmethane (BM), bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), and methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT), in embryo-larval stages of zebrafish Danio rerio. Fish eggs were exposed to single UV filters by contact with spiked sediment during 96 h at a concentration of 10 μg g-1. Among the four UV filters tested, BP3 was the more toxic, reducing cardiac frequency and increasing standard metabolic rate of larvae.
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Affiliation(s)
- Julie Lucas
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologie Microbiennes, LBBM, Observatoire Océanologique, 66650, Banyuls-sur-Mer, France.
| | - Valentin Logeux
- Sorbonne Université, CNRS, Fédération de Recherche, Observatoire Océanologique, 66650, Banyuls-sur-Mer, France
| | - Alice M S Rodrigues
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologie Microbiennes, LBBM, Observatoire Océanologique, 66650, Banyuls-sur-Mer, France
| | - Didier Stien
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologie Microbiennes, LBBM, Observatoire Océanologique, 66650, Banyuls-sur-Mer, France
| | - Philippe Lebaron
- Sorbonne Université, CNRS, Laboratoire de Biodiversité et Biotechnologie Microbiennes, LBBM, Observatoire Océanologique, 66650, Banyuls-sur-Mer, France
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3
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Atherton JA, McCormick MI. Parents know best: transgenerational predator recognition through parental effects. PeerJ 2020; 8:e9340. [PMID: 32596050 PMCID: PMC7306219 DOI: 10.7717/peerj.9340] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Accepted: 05/20/2020] [Indexed: 11/30/2022] Open
Abstract
In highly biodiverse systems, such as coral reefs, prey species are faced with predatory threats from numerous species. Recognition of predators can be innate, or learned, and can help increase the chance of survival. Research suggests that parental exposure to increased predatory threats can affect the development, behaviour, and ultimately, success of their offspring. Breeding pairs of damselfish (Acanthochromis polyacanthus) were subjected to one of three olfactory and visual treatments (predator, herbivore, or control), and their developing embryos were subsequently exposed to five different chemosensory cues. Offspring of parents assigned to the predator treatment exhibited a mean increase in heart rate two times greater than that of offspring from parents in herbivore or control treatments. This increased reaction to a parentally known predator odour suggests that predator-treated parents passed down relevant threat information to their offspring, via parental effects. This is the first time transgenerational recognition of a specific predator has been confirmed in any species. This phenomenon could influence predator-induced mortality rates and enable populations to adaptively respond to fluctuations in predator composition and environmental changes.
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Affiliation(s)
- Jennifer A Atherton
- College of Science & Engineering, James Cook University of North Queensland, Townsville, Queensland, Australia.,ARC Centre of Excellence for Coral Reef Studies, Townsville, Queensland, Australia
| | - Mark I McCormick
- College of Science & Engineering, James Cook University of North Queensland, Townsville, Queensland, Australia.,ARC Centre of Excellence for Coral Reef Studies, Townsville, Queensland, Australia
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4
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Wassink L, Huerta B, Li W, Scribner K. Interaction of egg cortisol and offspring experience influences stress-related behaviour and physiology in lake sturgeon. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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5
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Fakan EP, McCormick MI. Boat noise affects the early life history of two damselfishes. MARINE POLLUTION BULLETIN 2019; 141:493-500. [PMID: 30955760 DOI: 10.1016/j.marpolbul.2019.02.054] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Revised: 01/15/2019] [Accepted: 02/24/2019] [Indexed: 05/15/2023]
Abstract
Anthropogenic noise can have a negative effect on the physiology and survival of marine fishes. Most research has focused on later life-stages, and few studies have investigated the effects of human-induced noise on embryogenesis. The current study investigated whether playback of motorboat noise affected the embryogenesis of the coral reef damselfishes, Amphiprion melanopus and Acanthochromis polyacanthus. Embryos reared under the playback of boat noise had faster heart rates compared to the ambient reef controls. The effects of noise on morphological development differed between species and the fundamental interrelationships between early life history characteristics changed dramatically under boat noise for Ac. polyacanthus. Noise treatments did not alter the survival rates of embryos under laboratory conditions. Although species specific, our findings suggest that anthropogenic noise causes physiological responses in fishes during embryogenesis and these changes have direct impacts on their development and these alterations may have carry-over effects to later life stages.
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Affiliation(s)
- E P Fakan
- ARC Centre of Excellence for Coral Reef Studies, and Department of Marine Biology and Aquaculture, James Cook University, Townsville, Queensland, Australia.
| | - M I McCormick
- ARC Centre of Excellence for Coral Reef Studies, and Department of Marine Biology and Aquaculture, James Cook University, Townsville, Queensland, Australia
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Jain-Schlaepfer S, Fakan E, Rummer JL, Simpson SD, McCormick MI. Impact of motorboats on fish embryos depends on engine type. CONSERVATION PHYSIOLOGY 2018; 6:coy014. [PMID: 29593871 PMCID: PMC5865524 DOI: 10.1093/conphys/coy014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 02/08/2018] [Accepted: 02/22/2018] [Indexed: 05/24/2023]
Abstract
Human generated noise is changing the natural underwater soundscapes worldwide. The most pervasive sources of underwater anthropogenic noise are motorboats, which have been found to negatively affect several aspects of fish biology. However, few studies have examined the effects of noise on early life stages, especially the embryonic stage, despite embryo health being critical to larval survival and recruitment. Here, we used a novel setup to monitor heart rates of embryos from the staghorn damselfish (Amblyglyphidodon curacao) in shallow reef conditions, allowing us to examine the effects of in situ boat noise in context with real-world exposure. We found that the heart rate of embryos increased in the presence of boat noise, which can be associated with the stress response. Additionally, we found 2-stroke outboard-powered boats had more than twice the effect on embryo heart rates than did 4-stroke powered boats, showing an increase in mean individual heart rate of 1.9% and 4.6%, respectively. To our knowledge this is the first evidence suggesting boat noise elicits a stress response in fish embryo and highlights the need to explore the ecological ramifications of boat noise stress during the embryo stage. Also, knowing the response of marine organisms caused by the sound emissions of particular engine types provides an important tool for reef managers to mitigate noise pollution.
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Affiliation(s)
- Sofia Jain-Schlaepfer
- ARC Centre of Excellence for Coral Reef Studies, and College of Science and Engineering, James Cook University, Townsville, Queensland 4811, Australia
| | - Eric Fakan
- ARC Centre of Excellence for Coral Reef Studies, and College of Science and Engineering, James Cook University, Townsville, Queensland 4811, Australia
| | - Jodie L Rummer
- ARC Centre of Excellence for Coral Reef Studies, and College of Science and Engineering, James Cook University, Townsville, Queensland 4811, Australia
| | - Stephen D Simpson
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Geoffrey Pope, Stocker Road, Exeter EX4 4QD, UK
| | - Mark I McCormick
- ARC Centre of Excellence for Coral Reef Studies, and College of Science and Engineering, James Cook University, Townsville, Queensland 4811, Australia
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7
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Willi RA, Faltermann S, Hettich T, Fent K. Active Glucocorticoids Have a Range of Important Adverse Developmental and Physiological Effects on Developing Zebrafish Embryos. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:877-885. [PMID: 29190094 DOI: 10.1021/acs.est.7b06057] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Glucocorticoids in aquatic systems originating from natural excretion and medical use may pose a risk to fish. Here, we analyzed physiological and transcriptional effects of clobetasol propionate (CLO), cortisol and cortisone in zebrafish embryos as single compounds and binary mixtures. CLO and cortisol, but not cortisone showed a concentration-dependent decrease in muscle contraction, increase in heart rate, and accelerated hatching. CLO also induced immobilization and edema at high concentrations. Transcription analysis covering up to 26 genes showed that mostly genes related to glucose metabolism, immune system and development were differentially expressed at 91 ng/L and higher. CLO showed stronger effects on immune system genes than cortisol, which was characterized by upregulation of fkbp5, irg1l, gilz, and socs3, and development genes, matrix metalloproteinases mmp-9 and mmp-13, while cortisol led to stronger upregulation of the gluconeogenesis genes g6pca and pepck1. CLO also induced genes regulating the circadian rhythm, nr1d1 and per1a. In contrast, cortisone led to down-regulation of vitellogenin. Binary mixtures of cortisol and CLO mostly showed a similar activity as CLO alone on physiological and transcriptional end points but additive effects in heart rate and pepck1 upregulation, which indicates that mixtures of glucocorticoids may be of concern for developing fish.
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Affiliation(s)
- Raffael Alois Willi
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences , Gründenstrasse 40, CH-4132 Muttenz, Switzerland
| | - Susanne Faltermann
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences , Gründenstrasse 40, CH-4132 Muttenz, Switzerland
| | - Timm Hettich
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences , Gründenstrasse 40, CH-4132 Muttenz, Switzerland
| | - Karl Fent
- University of Applied Sciences and Arts Northwestern Switzerland, School of Life Sciences , Gründenstrasse 40, CH-4132 Muttenz, Switzerland
- Swiss Federal Institute of Technology (ETH Zürich), Institute of Biogeochemistry and Pollution Dynamics, Department of Environmental System Sciences , CH-8092 Zürich, Switzerland
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8
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Capelle PM, Semeniuk CAD, Sopinka NM, Heath JW, Love OP. Prenatal Stress Exposure Generates Higher Early Survival and Smaller Size without Impacting Developmental Rate in a Pacific Salmon. ACTA ACUST UNITED AC 2017; 325:641-650. [PMID: 28101914 DOI: 10.1002/jez.2058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/21/2016] [Accepted: 12/31/2016] [Indexed: 12/28/2022]
Abstract
Prenatal exposure to elevated glucocorticoids can act as a signal of environmental stress, resulting in modifications to offspring phenotype. While "negative" phenotypic effects (i.e., smaller size, slower growth) are often reported, recent research coupling phenotype with other fitness-related traits has suggested positive impacts of prenatal stress. Using captive Chinook salmon (Oncorhynchus tshawytscha), we treated eggs with biologically relevant cortisol levels-low (300 ng mL-1 ), high (1,000 ng mL-1 ), or control (0 ng mL-1 )-to examine the early-life impacts of maternally transferred stress hormones on offspring. Specifically, we measured early survival, rate of development, and multiple measures of morphology. Low and high cortisol dosing of eggs resulted in significantly higher survival compared to controls (37% and 24% higher, respectively). Fish reared from high dose eggs were structurally smaller compared to control fish, but despite this variation in structural size, exposure to elevated cortisol did not impact developmental rate. These results demonstrate that elevations in egg cortisol can positively influence offspring fitness through an increase in early survival while also altering phenotype at a critical life-history stage. Overall, these results suggest that exposure to prenatal stress may not always produce apparently negative impacts on offspring fitness and further proposes that complex phenotypic responses should be examined in relevant environmental conditions.
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Affiliation(s)
- Pauline M Capelle
- Department of Biological Sciences, University of Windsor, Windsor, Canada
| | - Christina A D Semeniuk
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Canada
| | - Natalie M Sopinka
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Canada
| | - John W Heath
- Yellow Island Aquaculture Ltd, Heriot Bay, BC, V0P 1H0, Canada
| | - Oliver P Love
- Department of Biological Sciences, University of Windsor, Windsor, Canada.,Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Canada
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9
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Burggren WW, Dubansky B, Bautista NM. Cardiovascular Development in Embryonic and Larval Fishes. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/bs.fp.2017.09.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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10
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McCormick MI. Protogyny in a tropical damselfish: females queue for future benefit. PeerJ 2016; 4:e2198. [PMID: 27413641 PMCID: PMC4933090 DOI: 10.7717/peerj.2198] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 06/09/2016] [Indexed: 11/20/2022] Open
Abstract
Membership of the group is a balance between the benefits associated with group living and the cost of socially constrained growth and breeding opportunities, but the costs and benefits are seldom examined. The goal of the present study was to explore the trade-offs associated with group living for a sex-changing, potentially protogynous coral reef fish, the Ambon damselfish, Pomacentrus amboinensis. Extensive sampling showed that the species exhibits resource defence polygyny, where dominant males guard a nest site that is visited by females. P. amboinensis have a longevity of about 6.5 years on the northern Great Barrier Reef. While the species can change sex consistent with being a protogynous hermaphrodite, it is unclear the extent to which the species uses this capability. Social groups are comprised of one reproductive male, 1-7 females and a number of juveniles. Females live in a linear dominance hierarchy, with the male being more aggressive to the beta-female than the alpha-female, who exhibits lower levels of ovarian cortisol. Surveys and a tagging study indicated that groups were stable for at least three months. A passive integrated transponder tag study showed that males spawn with females from their own group, but also females from neighbouring groups. In situ behavioural observations found that alpha-females have priority of access to the nest site that the male guarded, and access to higher quality foraging areas. Male removal studies suggest that the alpha-females can change sex to take over from the male when the position becomes available. Examination of otolith microstructure showed that those individuals which change sex to males have different embryonic characteristics at hatching, suggesting that success may involve a component that is parentally endowed. The relative importance of parental effects and social organisation in affecting the importance of female queuing is yet to be studied, but will likely depend on the strength of social control by the dominant members of the group.
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Affiliation(s)
- Mark I McCormick
- ARC Centre of Excellence for Coral Reef Studies, and Department of Marine Biology and Aquaculture, James Cook University , Townsville , Queensland , Australia
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11
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McNeil PL, Nebot C, Sloman KA. Physiological and Behavioral Effects of Exposure to Environmentally Relevant Concentrations of Prednisolone During Zebrafish (Danio rerio) Embryogenesis. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:5294-304. [PMID: 27120978 DOI: 10.1021/acs.est.6b00276] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The presence of synthetic glucocorticoids within the aquatic environment has been highlighted as a potential environmental concern as they may mimic the role of endogenous glucocorticoids during vertebrate ontogeny. Prednisolone is a commonly prescribed synthetic glucocorticoid which has been repeatedly detected in the environment. This study investigated the impact of environmentally relevant concentrations of prednisolone (0.1, 1, and 10 μg/L) during zebrafish embryogenesis using physiological and behavioral end points which are known to be mediated by endogenous glucocorticoids. The frequency of spontaneous muscle contractions (24 hpf) was significantly reduced by prednisolone and 0.1 μg/L increased the distance embryos swam in response to a mechanosensory stimulus (48 hpf). The percentage of embryos hatched significantly increased following prednisolone treatment (1 and 10 μg/L), while growth and mortality were unaffected. The onset of heart contraction was differentially affected by prednisolone while heart rate and oxygen consumption both increased significantly throughout embryogenesis. No substantial effect on the axial musculature was observed. Morphological changes to the lower jaw were detected at 96 hpf in response to 1 μg/L of prednisolone. Several parameters of swim behavior were also significantly affected. Environmentally relevant concentrations of prednisolone therefore alter early zebrafish ontogeny and significantly affect embryo behavior.
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Affiliation(s)
- Paul L McNeil
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland , Paisley, U.K
| | - Carolina Nebot
- Department of Analytical Chemistry, Nutrition and Bromatology, Faculty of Veterinary Medicine, University of Santiago de Compostela , Lugo, Spain
| | - Katherine A Sloman
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland , Paisley, U.K
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12
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Eaton L, Edmonds EJ, Henry TB, Snellgrove DL, Sloman KA. Mild maternal stress disrupts associative learning and increases aggression in offspring. Horm Behav 2015; 71:10-5. [PMID: 25840012 DOI: 10.1016/j.yhbeh.2015.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 03/17/2015] [Accepted: 03/24/2015] [Indexed: 01/22/2023]
Abstract
Maternal stress has been shown to affect behaviour of offspring in a wide range of animals, but this evidence has come from studies that exposed gestating mothers to acute or severe stressors, such as restraint or exposure to synthetic stress hormones. Here we show that exposure of mothers to even a mild stressor reduces associative learning and increases aggression in offspring. Female guppies were exposed to routine husbandry procedures that produced only a minimal, non-significant, elevation of the stress hormone cortisol. In contrast to controls, offspring from mothers that experienced this mild stress failed to learn to associate a colour cue and food reward, and showed a greater amount of inter-individual variation in behaviour compared with control offspring. This mild stress also resulted in offspring that were more aggressive towards their own mirror image than controls. While it is possible that these results could represent the transmission of beneficial maternal characteristics to offspring born into unpredictable environments, the potential for mild maternal stress to affect offspring performance also has important implications for research into the trans-generational effects of stress.
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Affiliation(s)
- L Eaton
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland, Paisley, Scotland PA1 2BE, UK.
| | - E J Edmonds
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland, Paisley, Scotland PA1 2BE, UK
| | - T B Henry
- School of Life Sciences, Heriot-Watt University, Edinburgh, Scotland EH14 4AS, UK; Center for Environmental Biotechnology, University of Tennessee, Knoxville, TN 37996, USA; Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN 37996 USA
| | - D L Snellgrove
- WALTHAM Centre for Pet Nutrition, Freeby Lane, Waltham-on-the-Wolds, LE14 4RT, Leicestershire, UK
| | - K A Sloman
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland, Paisley, Scotland PA1 2BE, UK
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13
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Lucas J, Perrichon P, Nouhaud M, Audras A, Leguen I, Lefrancois C. Aerobic metabolism and cardiac activity in the descendants of zebrafish exposed to pyrolytic polycyclic aromatic hydrocarbons. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:13888-13897. [PMID: 24994101 DOI: 10.1007/s11356-014-3116-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 05/28/2014] [Indexed: 06/03/2023]
Abstract
The increase of anthropogenic activities on coastal areas induces discharges of polycyclic aromatic hydrocarbons (PAHs) in aquatic ecosystem. PAH effects depend not only on their concentration and the way of contamination but also on the different developmental stages of the organism. Zebrafish were exposed to relevant concentration of pyrolytic PAHs from the first meal (i.e., 5-day post fertilization, dpf) to mature adults. Parental effect of this type of exposure was evaluated through the assessment of aerobic metabolic scope, cardiac frequency, and cardiac mRNA expression on larval and/or embryo progeny of contaminated fish. Our results suggest that cardiac frequency increased in larval descendants of fish exposed to the environmental concentration of pyrolytic PAHs (i.e., 5 ng.g(-1) of food), while a lack of effect on aerobic metabolism in 5 dpf larvae was highlighted. A surexpression of mRNA related to the cardiac calcium transporting ATPase atp2a2a, a protein essential for contraction, is in accordance with this increasing cardiac frequency. Even if cardiac development genes cmlc1 and tnnt2a were not affected at early life stages tested, complementary work on cardiac structure could be interesting to better understand PAHs action.
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Affiliation(s)
- Julie Lucas
- UMR 7266 Littoral Environnement Sociétés (LIENSs), Institut du Littoral et de l'Environnement, 2 rue Olympe de Gouges, 17000, La rochelle, France,
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14
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Trayer V, Hwang PP, Prunet P, Thermes V. Assessment of the role of cortisol and corticosteroid receptors in epidermal ionocyte development in the medaka (Oryzias latipes) embryos. Gen Comp Endocrinol 2013; 194:152-61. [PMID: 24084592 DOI: 10.1016/j.ygcen.2013.09.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 09/17/2013] [Accepted: 09/19/2013] [Indexed: 12/28/2022]
Abstract
Cortisol is a pleiotropic glucocorticoid hormone that acts through the intracellular glucocorticoid receptors (GR). Cortisol affects many important biological functions in mammals, including immune function, behavior, stress, metabolism, growth and organogenesis. In fishes, cortisol has an additional function in the osmoregulatory activity of ionocytes (ICs). Although much progress has been made toward understanding cortisol action at the levels of adult osmoregulatory tissues, the developmental functions of cortisol and its receptors in ICs remain to be clarified. We first analyzed the total contents of both cortisol and corticosteroid receptor mRNAs (GR1, GR2 and MR) during medaka development. Although low levels of cortisol were detected during development of the medaka embryo, maternal GR1, GR2 and MR transcripts were detected at higher levels than zygotic transcripts. We investigated the effect of exogenous cortisol on IC number during medaka embryogenesis. We observed that cortisol treatment induced an earlier expansion of the IC population but did not modify the final IC number. Using functional genomic approaches, we also tested the involvement of GR1, GR2 and mineralocorticoid receptor (MR) in IC development by systematic knock-down with translation-blocking morpholinos. Only GR2 knock-down led to a reduction of the total number of ICs in the epidermis. In addition, a GR2 splice-blocking morpholino did not have any effect on the biogenesis of ICs, underscoring the importance of maternally inherited GR2 mRNAs. We propose that maternal GR2, but not GR1 or MR, is a major pathway in the IC biogenesis in medaka most likely through cortisol activation, and that cortisol exposition fine-tunes their developmental timing. These findings provide a framework for future research on the regulatory functions of corticosteroids in euryhaline fishes and provide medaka as an advantageous model to further elucidate the underlying molecular regulatory mechanisms of IC development.
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Tokarz J, Norton W, Möller G, Hrabé de Angelis M, Adamski J. Zebrafish 20β-hydroxysteroid dehydrogenase type 2 is important for glucocorticoid catabolism in stress response. PLoS One 2013; 8:e54851. [PMID: 23349977 PMCID: PMC3551853 DOI: 10.1371/journal.pone.0054851] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 12/17/2012] [Indexed: 11/19/2022] Open
Abstract
Stress, the physiological reaction to a stressor, is initiated in teleost fish by hormone cascades along the hypothalamus-pituitary-interrenal (HPI) axis. Cortisol is the major stress hormone and contributes to the appropriate stress response by regulating gene expression after binding to the glucocorticoid receptor. Cortisol is inactivated when 11β-hydroxysteroid dehydrogenase (HSD) type 2 catalyzes its oxidation to cortisone. In zebrafish, Danio rerio, cortisone can be further reduced to 20β-hydroxycortisone. This reaction is catalyzed by 20β-HSD type 2, recently discovered by us. Here, we substantiate the hypothesis that 20β-HSD type 2 is involved in cortisol catabolism and stress response. We found that hsd11b2 and hsd20b2 transcripts were up-regulated upon cortisol treatment. Moreover, a cortisol-independent, short-term physical stressor led to the up-regulation of hsd11b2 and hsd20b2 along with several HPI axis genes. The morpholino-induced knock down of hsd20b2 in zebrafish embryos revealed no developmental phenotype under normal culture conditions, but prominent effects were observed after a cortisol challenge. Reporter gene experiments demonstrated that 20β-hydroxycortisone was not a physiological ligand for the zebrafish glucocorticoid or mineralocorticoid receptor but was excreted into the fish holding water. Our experiments show that 20β-HSD type 2, together with 11β-HSD type 2, represents a short pathway in zebrafish to rapidly inactivate and excrete cortisol. Therefore, 20β-HSD type 2 is an important enzyme in stress response.
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Affiliation(s)
- Janina Tokarz
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Experimental Genetics, Genome Analysis Center, Neuherberg, Germany
| | - William Norton
- Centre Nationale de la Recherche Scientifique, Zebrafish Neurogenetics, Gif sur Yvette, France
| | - Gabriele Möller
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Experimental Genetics, Genome Analysis Center, Neuherberg, Germany
| | - Martin Hrabé de Angelis
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Experimental Genetics, Genome Analysis Center, Neuherberg, Germany
- Lehrstuhl für Experimentelle Genetik, Technische Universität München, Freising-Weihenstephan, Germany
| | - Jerzy Adamski
- Helmholtz Zentrum München, German Research Center for Environmental Health, Institute of Experimental Genetics, Genome Analysis Center, Neuherberg, Germany
- Lehrstuhl für Experimentelle Genetik, Technische Universität München, Freising-Weihenstephan, Germany
- * E-mail:
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16
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Maddams JC, McCormick MI. Not all offspring are created equal: variation in larval characteristics in a serially spawning damselfish. PLoS One 2012; 7:e48525. [PMID: 23155389 PMCID: PMC3498294 DOI: 10.1371/journal.pone.0048525] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 10/01/2012] [Indexed: 11/21/2022] Open
Abstract
The way organisms allocate their resources to growth and reproduction are key attributes differentiating life histories. Many organisms spawn multiple times in a breeding season, but few studies have investigated the impact of serial spawning on reproductive allocation. This study investigated whether resource allocation was influenced by parental characteristics and prior spawning history in a serial spawning tropical damselfish (Pomacentrus amboinensis). The offspring attributes of isolated parents of known characteristics were monitored over a 6-week breeding period in the field. Smaller females produced larvae of longer length and larger energy reserves at hatching. This finding is contrary to several other studies that found larger females produce offspring of greater quality. We found that resource allocation in the form of reproductive output was not influenced by the number of spawning events within the breeding season, with larger females producing the greatest number of offspring. Larval characteristics changed as spawning progressed. There was a general decline in length of larvae produced, with an increase in the size of the larval yolk-sac, for all females regardless of size as spawning progressed. This trend was accentuated by the smallest females. This change in larval characteristics may reflect a parental ability to forecast unfavourable conditions as the season progresses or a mechanism to ensure that some will survive no matter what conditions they encounter. This study highlights the importance of accounting for temporal changes in reproductive allocation in studies of reproductive trade-offs and investigations into the importance of parental effects.
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Affiliation(s)
- Jessica Claire Maddams
- School of Marine and Tropical Biology, James Cook University, Townsville, Queensland, Australia.
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17
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Nesan D, Vijayan MM. Embryo exposure to elevated cortisol level leads to cardiac performance dysfunction in zebrafish. Mol Cell Endocrinol 2012; 363:85-91. [PMID: 22842336 DOI: 10.1016/j.mce.2012.07.010] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Revised: 06/19/2012] [Accepted: 07/19/2012] [Indexed: 11/17/2022]
Abstract
In zebrafish (Danio rerio), de novo cortisol synthesis commences only after hatching, providing an interesting model to study the effects of maternal stress and abnormal cortisol deposition on embryo development and performance. We hypothesized that elevated cortisol levels during pre-hatch embryogenesis compromise cardiac performance in developing zebrafish. Cortisol was microinjected into one-cell embryos to elevate basal cortisol levels during embryogenesis. Elevated embryo cortisol content increased heart deformities, including pericardial edema and malformed chambers, and lowered resting heartbeat post-hatch. This phenotype coincided with suppression of key cardiac genes, including nkx2.5, cardiac myosin light chain 1, cardiac troponin type T2A, and calcium transporting ATPase, underpinning a mechanistic link to heart malformation. The attenuation of the heartbeat response to a secondary stressor post-hatch also confirms a functional reduction in cardiac performance. Altogether, high cortisol content during embryogenesis, mimicking increased deposition due to maternal stress, decreases cardiac performance and may reduce zebrafish offspring survival.
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Affiliation(s)
- Dinushan Nesan
- Department of Biology, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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18
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Åberg Andersson M, Silva PIM, Steffensen JF, Höglund E. Effects of maternal stress coping style on offspring characteristics in rainbow trout (Oncorhynchus mykiss). Horm Behav 2011; 60:699-705. [PMID: 21983227 DOI: 10.1016/j.yhbeh.2011.09.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2011] [Revised: 09/14/2011] [Accepted: 09/14/2011] [Indexed: 10/17/2022]
Abstract
Maternal size, age, and allostatic load influence offspring size, development, and survival. Some of these effects have been attributed to the release of glucocorticoids, and individual variation in these stress hormones is related to a number of traits. Correlated traits are often clustered and used to define the proactive and reactive stress coping styles. Although stress coping styles have been identified in a number of animal groups, little is known about the coupling between stress coping style and offspring characteristics. In the present study, plasma cortisol levels in ovulated mothers and cortisol levels in non-fertilized eggs from two rainbow trout (Oncorhynchus mykiss) strains selected for high (HR) and low (LR) post-stress plasma cortisol levels were compared. Offspring characteristics such as egg size, larval growth, and energy reserves also were compared between the two strains. Maternal plasma and egg cortisol levels were correlated, but no difference between the HR and LR strains was detected in either parameter. LR females produced larger eggs, and larvae with larger yolk sacs compared to HR females, however no differences in larval body size (excluding the yolk) was detected between strains. Considering that the HR and LR strains have a number of correlated behavioral and physiological traits that resemble the reactive and proactive stress coping styles, respectively, the results suggest that proactive mothers invest more energy into their offspring, producing larvae with larger energy reserves. It is possible that larger energy reserves in proactive larvae support the energy requirement for establishing and defending territory in salmonid fish. Furthermore, in the present study we found a positive relationship between mother plasma cortisol and egg cortisol; however neither mother plasma cortisol nor egg cortisol differed between strains. These results indicate that cortisol endowment from the mother to the offspring plays a minor role in the transfer of the behavioral and physiological traits which separates these strains.
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Affiliation(s)
- M Åberg Andersson
- Technical University of Denmark, DTU Aqua, Section for Aquaculture, The North Sea Research Centre, PO Box 101, DK-9850 Hirtshals, Denmark.
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19
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Eriksen MS, Faerevik G, Kittilsen S, McCormick MI, Damsgård B, Braithwaite VA, Braastad BO, Bakken M. Stressed mothers - troubled offspring: a study of behavioural maternal effects in farmed Salmo salar. JOURNAL OF FISH BIOLOGY 2011; 79:575-586. [PMID: 21884101 DOI: 10.1111/j.1095-8649.2011.03036.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Mature female Atlantic salmon Salmo salar were given intraperitoneal cortisol implants 1 week prior to stripping to examine the influence of simulated maternal stress on offspring boldness and social dominance. Behavioural tests originally designed to investigate stress responsiveness and coping styles in salmonids (i.e. feeding in isolation, dominance tests and acute confinement) were carried out on the offspring 1·5 years after hatching. In the feeding test, there were no differences between the two treatment groups in total feeding score or number of pellets eaten, but offspring from the cortisol-implanted females made more unsuccessful feeding attempts than offspring from control females. In dominance tests, there was no difference between controls and cortisol-treated fish regarding propensity to become socially dominant. A higher proportion of individuals with bite marks, however, was observed in the cortisol group when compared to controls. Cortisol-treated offspring that gained dominant rank in the dominance tests performed more aggressive acts after stable dominance-subordinate relationships were established compared to control winners. During acute confinement stress, offspring from cortisol-implanted females showed a reduction in the proportion of time they were moving compared to the controls. These results indicate that the maternal endocrine state at spawning affects several aspects of progeny behaviour potentially related to subsequent success and survival in farmed S. salar.
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Affiliation(s)
- M S Eriksen
- Department of Animal and Aquacultural Sciences, Norwegian University of Life Sciences, P O Box 5003, NO-1432 Ås, Norway.
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20
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Burton T, Hoogenboom MO, Armstrong JD, Groothuis TGG, Metcalfe NB. Egg hormones in a highly fecund vertebrate: do they influence offspring social structure in competitive conditions? Funct Ecol 2011. [DOI: 10.1111/j.1365-2435.2011.01897.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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21
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The use of the zebrafish model in stress research. Prog Neuropsychopharmacol Biol Psychiatry 2011; 35:1432-51. [PMID: 20971150 DOI: 10.1016/j.pnpbp.2010.10.010] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 10/05/2010] [Accepted: 10/13/2010] [Indexed: 01/21/2023]
Abstract
The study of the causes and mechanisms underlying psychiatric disorders requires the use of non-human models for the test of scientific hypotheses as well as for use in pre-clinical drug screening and discovery. This review argues in favor of the use of zebrafish as a novel animal model to study the impact of early (stressful) experiences on the development of differential stress phenotypes in later life. This phenomenon is evolutionary conserved among several vertebrate species and has relevance to the etiology of psychiatric disorders. Why do we need novel animal models? Although significant progress has been achieved with the use of traditional mammalian models, there are major pitfalls associated with their use that impedes progress on two major fronts: 1) uncovering of the molecular mechanisms underlying aspects of compromised (stress-exposed) brain development relevant to the etiology of psychiatric disorders, and 2) ability to develop high-throughput technology for drug discovery in the field of psychiatry. The zebrafish model helps resolve these issues. Here we present a conceptual framework for the use of zebrafish in stress research and psychiatry by addressing three specific domains of application: 1) stress research, 2) human disease mechanisms, and 3) drug discovery. We also present novel methodologies associated with the development of the zebrafish stress model and discuss how such methodologies can contribute to remove the main bottleneck in the field of drug discovery.
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22
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Leatherland JF, Li M, Barkataki S. Stressors, glucocorticoids and ovarian function in teleosts. JOURNAL OF FISH BIOLOGY 2010; 76:86-111. [PMID: 20738701 DOI: 10.1111/j.1095-8649.2009.02514.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The purpose of this overview is to re-examine the postulated direct and indirect actions of glucocorticoids on ovarian function in teleosts. The re-examination is undertaken in light of recent advances in the understanding of the stress response itself, the mode of action of the hypothalamus-pituitary gland-ovarian (HPO) axis, the mechanisms of control of oestrogen-dependent hepatic vitellogenin (VtG) secretion and the apparent roles of corticotrophin-releasing hormone (CRH) and CRH-related factors in the regulation of feeding activity. Many of the results of different studies, particularly whole-animal studies, are conflicting, and little is known as to whether the hormone acts directly on various components of the HPO axis or indirectly by virtue of redirection of energy resources away from ovarian growth to provide a source of metabolic resources for other organ systems involved in the physiological stress response. In vitro studies provide some new insights into the direct actions of glucocorticoid on hepatic VtG synthesis and ovarian follicle steroidogenesis, but even here, in some studies the cellular sites of action of these hormones is not altogether clear. The overview emphasizes the complexity of the stress response, the complexity of the regulation of glucocorticoid-dependent gene expression and the extensive interactive nature of the HPO with other hypothalamus-pituitary gland-peripheral endocrine gland axes, such as the thyroid (HPT), 'somatic' (GH-IGF) and interrenal tissue (HPI) axes.
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Affiliation(s)
- J F Leatherland
- Department of Biomedical Sciences, Ontario Veterinary College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada.
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23
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24
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Gagliano M, McCormick MI. Hormonally mediated maternal effects shape offspring survival potential in stressful environments. Oecologia 2009; 160:657-65. [PMID: 19352712 DOI: 10.1007/s00442-009-1335-8] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2008] [Accepted: 03/16/2009] [Indexed: 11/28/2022]
Abstract
In most egg-laying vertebrates, maternal responses to stressful conditions are translated into the release of glucocorticoid hormones such as cortisol, which are then transmitted to their developing embryos. Although such maternally transmitted hormonal resources have been shown to influence or even interfere with the optimal developmental trajectories of offspring in many taxa, their influence on the dynamics of wild fish populations remains largely unexplored. Here, we examined the extent to which simulated hormonally mediated maternal effects influence the development and early survival of the coral reef damselfish, Pomacentrus amboinensis. Concentrations of cortisol in the eggs were manipulated within naturally occurring limits by immersion. We found that the proportion of embryos that delayed hatching when exposed to high levels of cortisol was considerably lower than in the other two treatments (low cortisol dose and control). High cortisol levels in P. amboinensis eggs resulted in increased egg mortality and greater asymmetry in hatchlings. For embryos that successfully hatched, individuals from the elevated cortisol treatments (especially low dose) survived longer after hatching. Although individuals that originated from eggs with elevated cortisol levels survived longer after hatching, they may not gain an overall survival advantage. Our results suggest that subtle increases in the allocation of maternally derived hormones, such as cortisol, to offspring are a direct way for stressed mothers to endow their young with an immediate survival advantage. We propose that this immediate benefit outweighs the developmental costs which may be expressed as reduced fitness at later life stages.
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Affiliation(s)
- Monica Gagliano
- School of Marine and Tropical Biology, James Cook University, Townsville, QLD, Australia.
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25
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Abstract
1. Environmentally induced maternal effects are known to affect offspring phenotype, and as a result, the dynamics and evolution of populations across a wide range of taxa. 2. In a field experiment, we manipulated maternal condition by altering food availability, a key factor influencing maternal energy allocation to offspring. We then examined how maternal condition at the time of gametogenesis affects the relationships among early life-history traits and survivorship during early development of the coral reef fish Pomacentrus amboinensis. 3. Maternal condition did not affect the number of embryos that hatched or the number of hatchlings surviving to a set time. 4. We found no significant difference in egg size in relation to the maternal physiological state. However, eggs spawned by supplemented mothers were provisioned with greater energy reserves (yolk-sac and oil globule size) than nonsupplemented counterparts, suggesting that provision of energy reserves rather than egg size more closely reflected the maternal environment. 5. Among offspring originating from supplemented mothers, those with larger yolk-sacs were more likely to successfully hatch and survive for longer periods after hatching. However, among offspring from nonsupplemented mothers, yolk-sac size was either inconsequential to survival or offspring with smaller yolk-sac sizes were favoured. Mothers appear to influence the physiological capacity of their progeny and in turn the efficiency of individual offspring to utilize endogenous reserves. 6. In summary, our results show that the maternal environment influences the relationship between offspring characteristics and survival and suggest that energy-driven selective mechanisms may operate to determine progeny viability.
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Affiliation(s)
- Monica Gagliano
- Australian Research Council Centre of Excellence for Coral Reef Studies, School of Marine Biology, James Cook University, Townsville, Queensland 4811, Australia.
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26
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Gagliano M, McCormick MI, Meekan MG. Temperature-induced shifts in selective pressure at a critical developmental transition. Oecologia 2007; 152:219-25. [PMID: 17242907 DOI: 10.1007/s00442-006-0647-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2006] [Accepted: 12/11/2006] [Indexed: 10/23/2022]
Abstract
Selective mortality within a population, based on the phenotype of individuals, is the foundation of the theory of natural selection. We examined temperature-induced shifts in the relationships among early life history traits and survivorship over the embryonic and larval stages of a tropical damselfish, Pomacentrus amboinensis. Our experiments show that temperature determines the intensity of selective mortality, and that this changes with ontogeny. The size of energy stores determined survival through to hatching, after which egg size became a good indicator of fitness as predicted by theoretical models. Yet, the benefits associated with egg size were not uniform among test temperatures. Initial egg size positively influenced larval survival at control temperature (29 degrees C). However, this embryonic trait had no effect on post-hatching longevity of individuals reared at the higher (31 degrees C) and lower (25 degrees C) end of the temperature range. Overall, our findings indicate that the outcome of selective mortality is strongly dependent on the interaction between environment conditions and intrinsic developmental schedules.
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Affiliation(s)
- Monica Gagliano
- Australian Research Council Centre of Excellence for Coral Reef Studies, School of Marine and Tropical Biology, James Cook University, Townsville, QLD 4811, Australia.
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27
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Nichols KM, Broman KW, Sundin K, Young JM, Wheeler PA, Thorgaard GH. Quantitative trait loci x maternal cytoplasmic environment interaction for development rate in Oncorhynchus mykiss. Genetics 2007; 175:335-47. [PMID: 17057232 PMCID: PMC1774986 DOI: 10.1534/genetics.106.064311] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2006] [Accepted: 10/02/2006] [Indexed: 11/18/2022] Open
Abstract
Effects of maternal cytoplasmic environment (MCE) on development rate in rainbow trout were evaluated within a quantitative trait loci (QTL) analysis framework. Previous research had identified QTL for development rate in doubled haploid (DH) progeny produced from a cross between the Oregon State University (OSU) and the Swanson (SW) River rainbow trout clonal lines. In this study, progeny for QTL mapping were produced from a cross between the OSU and Clearwater (CW) River clonal lines. Doubled haploids were produced from the OSU x CW F1 by androgenesis using eggs from different females (or MCEs); with androgenesis, the maternal nuclear genome was destroyed by irradiation and diploidy was restored by blocking the first embryonic cleavage by heat shock. All embryos were incubated at the same temperature and development rate quantified as time to hatch. Using a linkage map constructed primarily with AFLP markers, QTL mapping was performed, including MCE covariates and QTL x MCE effects in models for testing. The major QTL for development rate in the OSU x SW cross overlaps with the major QTL found in this OSU x CW cross; effects at this locus were the same across MCEs. Both MCE and QTL x MCE effects contribute to variability in development rate, but QTL x MCE were minor and detected only at small-effect QTL.
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Affiliation(s)
- Krista M Nichols
- School of Biological Sciences and Center for Reproductive Biology, Washington State University, Pullman, Washington 99164-4236, USA.
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28
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Craig MP, Gilday SD, Hove JR. Dose-dependent effects of chemical immobilization on the heart rate of embryonic zebrafish. Lab Anim (NY) 2006; 35:41-7. [PMID: 17008908 DOI: 10.1038/laban1006-41] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2006] [Accepted: 06/10/2006] [Indexed: 11/09/2022]
Abstract
The small size and optical transparency of zebrafish embryos and larvae greatly facilitate modern intravital microscopic phenotyping of these experimentally tractable laboratory animals. Neither the experimentally derived dose-response relationships for chemicals commonly used in the mounting of live fish larvae, nor their effect on the stress of the animal, are currently available in the research literature. This is particularly problematic for IACUCs attempting to maintain the highest ethical standards of animal care in the face of a recent spate in investigator-initiated requests to use embryonic zebrafish as experimental models. The authors address this issue by describing the dose-dependent efficacy of several commonly used chemical mounting treatments and their effect on one stress parameter, embryo heart rate. The results of this study empirically define, for the first time, effective, minimally stressful treatments for immobilization and in vivo visualization during early zebrafish development.
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Affiliation(s)
- Michael P Craig
- Department of Genome Science, Genome Research Institute, University of Cincinnati, Cincinnati, OH 45237, USA
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29
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Weiss SL, Johnston G, Moore MC. Corticosterone stimulates hatching of late-term tree lizard embryos. Comp Biochem Physiol A Mol Integr Physiol 2006; 146:360-5. [PMID: 17208477 PMCID: PMC1885679 DOI: 10.1016/j.cbpa.2006.11.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2006] [Revised: 11/12/2006] [Accepted: 11/14/2006] [Indexed: 11/21/2022]
Abstract
The regulation of hatching in oviparous animals is important for successful reproduction and survival, but is poorly understood. We unexpectedly found that RU-486, a progesterone and glucocorticoid antagonist, interferes with hatching of viable tree lizard (Urosaurus ornatus) embryos in a dose-dependent manner and hypothesized that embryonic glucocorticoids regulate hatching. To test this hypothesis, we treated eggs with corticosterone (CORT) or vehicle on Day 30 (85%) of incubation, left other eggs untreated, and observed relative hatch order and hatch time. In one study, the CORT egg hatched first in 9 of 11 clutches. In a second study, the CORT egg hatched first in 9 of 12 clutches, before vehicle-treated eggs in 10 of 12 clutches, and before untreated eggs in 7 of 9 clutches. On average, CORT eggs hatched 18.2 h before vehicle-treated eggs and 11.6 h before untreated eggs. Thus, CORT accelerates hatching of near-term embryos and RU-486 appears to block this effect. CORT may mobilize energy substrates that fuel hatching and/or accelerate lung development, and may provide a mechanism by which stressed embryos escape environmental stressors.
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Affiliation(s)
- Stacey L Weiss
- School of Life Sciences, Arizona State University, Tempe, AZ 85287-1505, USA.
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30
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Abstract
Most marine populations are sustained by the entry of juveniles that have survived the larval phase, during which time most die. The number of survivors depends strongly on the quality of the eggs produced by spawning females, but it is not known how the social conditions under which breeding occurs influence the quality of larvae produced. Here I show that the density of females interacting with breeding mothers directly influences the size of larvae produced, through a stress-related mechanism. On the Great Barrier Reef of Australia, breeding pairs of a damselfish, Pomacentrus amboinensis, were isolated on habitat patches, and additional females that could not access the spawning site were added at four densities (0, 1, 3, or 6 females). Additional females increased aggressive interactions by mothers and increased the levels of the stress hormone, cortisol, in their ovaries, leading to reduced larval size. Neither egg output nor yolk size of the larvae was influenced by female density. Pairs breeding in isolation produced the largest larvae; current theory suggests that these larvae should contribute most to subsequent population replenishment events. This social mechanism may influence which females effectively contribute to the next generation and may promote resilience in patchy or isolated populations.
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Affiliation(s)
- Mark I McCormick
- School of Marine Biology and Aquaculture, James Cook University, Townsville, Queensland, Australia.
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31
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V Nechaev I, S Pavlov D. Catecholaminergic and cholinergic regulation of swimming motility development in free embryos of Cichlasoma Nigrofasciatum. JOURNAL OF EXPERIMENTAL ZOOLOGY. PART A, COMPARATIVE EXPERIMENTAL BIOLOGY 2005; 303:209-16. [PMID: 15726632 DOI: 10.1002/jez.a.146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
The divergence of progeny from the same spawners of Cichlasoma nigrofasciatum into two groups by duration of embryogenesis and the level of motor activity was studied close to the end of the embryonic period. Free embryos were also studied. During the study, eggs were treated with agents, modifying the activity of catecholaminergic and cholinergic systems. 3-Hydroxytyramine and L-Tyrosine were found to exert a weak influence on embryonic motility. After hatching, these substances modify swimming performance of free embryos, approximating movements of fish at later stages. 6-Hydroxydopamine and, still more, alpha-Bungarotoxin, decrease embryonic motility and postpone the hatching. The influence of these substances on the development of embryo motility increases during early ontogenesis, as indicated by decreased concentration of the substance, necessary for adequate reaction. Neither L-Tyrosine nor 6-Hydroxydopamine influenced the divergence of the progeny into two groups. Injection of the perivitelline fluid with high concentration of hatching enzyme from pre-hatching embryos into the perivitelline space of earlier embryos was found to induce the appearance of rotation movements, typical for more advanced embryos. Changes of correlation between the miogenic and neurogenic motor activity during early development of fish are discussed.
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Affiliation(s)
- Igor V Nechaev
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow 117071, Russia.
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32
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Siebeck UE. Communication in coral reef fish: the role of ultraviolet colour patterns in damselfish territorial behaviour. Anim Behav 2004. [DOI: 10.1016/j.anbehav.2003.11.010] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Green BS. Embryogenesis and oxygen consumption in benthic egg clutches of a tropical clownfish, Amphiprion melanopus (Pomacentridae). Comp Biochem Physiol A Mol Integr Physiol 2004; 138:33-8. [PMID: 15165568 DOI: 10.1016/j.cbpb.2004.02.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2003] [Revised: 02/16/2004] [Accepted: 02/17/2004] [Indexed: 11/22/2022]
Abstract
Variation in size at hatching is common in demersal spawning organisms, suggesting that processes during embryonic development may be critical in determining growth and development. To examine critical periods during embryonic development in the demersal spawning reef fish Amphiprion melanopus, the rate of oxygen consumption within an egg clutch was compared to morphological changes in the embryos. Oxygen consumption was least on day 1 of development where organ differentiation had not begun (mean 1.73+/-0.34x10(-5) micromol O(2) egg(-1) s(-1)). Tail movement throughout the perivitelline fluid began on day 3 and is likely to assist in moving oxygen around the embryo, complementing diffusive transport. The appearance of haemoglobin in the blood corresponded to a peak in oxygen consumption on day 4, where the highest mean rate of oxygen consumption was recorded (6.73+/-0.82x10(-5) micromol O(2) egg(-1) s(-1)). This could be a critical period in development whereby risk of mortality is increased through increased embryo requirements at developmental thresholds.
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Affiliation(s)
- Bridget S Green
- School of Marine Biology and Aquaculture, James Cook University, Douglas, Townsville Qld 4811, Australia.
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