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Turnley MT, Hughes TA, Larsen RT, Hersey KR, Broadway MS, Chitwood MC, Fairbanks WS, Lonsinger RC, McMillan BR. A fine-scale examination of parturition timing in temperate ungulates. Ecol Evol 2024; 14:e11703. [PMID: 38962024 PMCID: PMC11222017 DOI: 10.1002/ece3.11703] [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: 03/13/2024] [Revised: 06/18/2024] [Accepted: 06/24/2024] [Indexed: 07/05/2024] Open
Abstract
Parturition timing has long been a topic of interest in ungulate research. However, few studies have examined parturition timing at fine scale (e.g., <1 day). Predator activity and environmental conditions can vary considerably with diel timing, which may result in selective pressure for parturition to occur during diel times that maximize the likelihood of neonate survival. We monitored parturition events and early-life survival of elk (Cervus canadensis) and mule deer (Odocoileus hemionus) in Utah, USA to better understand diel timing of parturition in temperate ungulates. Diel timing of parturition was moderately synchronous among conspecifics and influenced by environmental variables on the date of parturition. For elk, parturition events were most common during the morning crepuscular period and generally occurred later (i.e., closer to 12:00) when a relatively large proportion of the moon was illuminated. For mule deer, parturition events were most common during the diurnal period and generally occurred later (i.e., closer to 15:00) on cold, wet dates. Diel timing of parturition did not influence neonate survival, but larger datasets may be required to verify the apparent lack of influence. Although additional work could evaluate alternative variables that might affect parturition timing, our data provide an improved and finer scale understanding of reproductive ecology and phenology in ungulates.
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Affiliation(s)
- Matthew T. Turnley
- Department of Natural Resource Ecology and ManagementOklahoma State UniversityStillwaterOklahomaUSA
| | - Tabitha A. Hughes
- School of Natural ResourcesUniversity of Nebraska‐LincolnLincolnNebraskaUSA
| | - Randy T. Larsen
- Department of Plant and Wildlife SciencesBrigham Young UniversityProvoUtahUSA
| | - Kent R. Hersey
- Utah Division of Wildlife ResourcesSalt Lake CityUtahUSA
| | - Matthew S. Broadway
- Department of Natural Resource Ecology and ManagementOklahoma State UniversityStillwaterOklahomaUSA
| | - M. Colter Chitwood
- Department of Natural Resource Ecology and ManagementOklahoma State UniversityStillwaterOklahomaUSA
| | - W. Sue Fairbanks
- Department of Natural Resource Ecology and ManagementOklahoma State UniversityStillwaterOklahomaUSA
| | - Robert C. Lonsinger
- U.S. Geological Survey, Oklahoma Cooperative Fish and Wildlife Research UnitOklahoma State UniversityStillwaterOklahomaUSA
| | - Brock R. McMillan
- Department of Plant and Wildlife SciencesBrigham Young UniversityProvoUtahUSA
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2
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Aychew M, Girma Z. Population size and structure of beisa oryx and gerenuk in Geralle National Park, southeastern Ethiopia. Ecol Evol 2024; 14:e70008. [PMID: 39015878 PMCID: PMC11250413 DOI: 10.1002/ece3.70008] [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: 03/11/2024] [Revised: 06/18/2024] [Accepted: 07/02/2024] [Indexed: 07/18/2024] Open
Abstract
The study was conducted to determine the population size of endangered Oryx beisa (Rüppell, 1835), and near-threatened Litocranius walleri (Brooke, 1878) of uncertain global population estimates in Geralle National Park, southeastern Ethiopia. Systematic line transects were established with a transect length range of 2.3 to 6.8 km long (a total of 165.4 km long with a sighting distance of 150 m after truncation). The combination of AIC and chi-square p-values was used as model selection criteria for density/population size estimation in distance sampling software. The lowest AIC, ∆AIC (close to zero), and Chi-square tests (p-value > .05) were selected with adequate model fit. The minimum observation was 67 individuals of beisa oryx in the dry season. The maximum observation was 349 individuals of gerenuk during the wet season. The minimum detection probability of oryx was in the wet season (p â = 76 ± 26), and the minimum detection probability of gerenuk was (p â = 75 ± 1) in both seasons. The two-season pooled density analyzed for studied species indicated (0.85 ± 0.34, 1.24 ± 0.47, beisa oryx/km2), and (3.82 ± 0.6, 4.88 ± 0.7 gerenuk/km2) in dry and wet seasons, respectively. It can be concluded from the results of the study that GNP is home to previously undiscovered healthy populations of the endangered beisa oryx and near-threatened gerenuk. So it is recommended to undergo in-depth population studies, including other species available in the national park and their habitat components, so as to design sound, sustainable conservation measures for the wildlife resources in the area.
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Affiliation(s)
- Melkamu Aychew
- Geralle National Park, Ethiopian Wildlife Conservation AuthorityAddis AbabaEthiopia
| | - Zerihun Girma
- Department of Wildlife & Ecotourism ManagementWondo Genet College of Forestry & Natural Resource Hawassa UniversityShshemeneEthiopia
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3
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Ruiz-Cruz M, Torres-Granados C, Tena-Sempere M, Roa J. Central and peripheral mechanisms involved in the control of GnRH neuronal function by metabolic factors. Curr Opin Pharmacol 2023; 71:102382. [PMID: 37307655 DOI: 10.1016/j.coph.2023.102382] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/21/2023] [Accepted: 04/24/2023] [Indexed: 06/14/2023]
Abstract
Gonadotropin-releasing hormone (GnRH) neurons are the final output pathway for the brain control of reproduction. The activity of this neuronal population, mainly located at the preoptic area of the hypothalamus, is controlled by a plethora of metabolic signals. However, it has been documented that most of these signal impact on GnRH neurons through indirect neuronal circuits, Kiss1, proopiomelanocortin, and neuropeptide Y/agouti-related peptide neurons being some of the most prominent mediators. In this context, compelling evidence has been gathered in recent years on the role of a large range of neuropeptides and energy sensors in the regulation of GnRH neuronal activity through both direct and indirect mechanisms. The present review summarizes some of the most prominent recent advances in our understanding of the peripheral factors and central mechanisms involved in the metabolic control of GnRH neurons.
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Affiliation(s)
- Miguel Ruiz-Cruz
- Instituto Maimónides de Investigación Biomédica de Córdoba, Department of Cell Biology, Physiology and Immunology, University of Córdoba; Hospital Universitario Reina Sofia (IMIBIC/HURS), 14004 Córdoba, Spain
| | - Carmen Torres-Granados
- Instituto Maimónides de Investigación Biomédica de Córdoba, Department of Cell Biology, Physiology and Immunology, University of Córdoba; Hospital Universitario Reina Sofia (IMIBIC/HURS), 14004 Córdoba, Spain
| | - Manuel Tena-Sempere
- Instituto Maimónides de Investigación Biomédica de Córdoba, Department of Cell Biology, Physiology and Immunology, University of Córdoba; Hospital Universitario Reina Sofia (IMIBIC/HURS), 14004 Córdoba, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, 14004 Córdoba, Spain
| | - Juan Roa
- Instituto Maimónides de Investigación Biomédica de Córdoba, Department of Cell Biology, Physiology and Immunology, University of Córdoba; Hospital Universitario Reina Sofia (IMIBIC/HURS), 14004 Córdoba, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, 14004 Córdoba, Spain.
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Forti LR, Hepp F, de Souza JM, Protazio A, Szabo JK. Climate drives anuran breeding phenology in a continental perspective as revealed by citizen‐collected data. DIVERS DISTRIB 2022. [DOI: 10.1111/ddi.13610] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
| | - Fábio Hepp
- Laboratório de Anfíbios e Répteis, Departamento de Zoologia, Instituto de Biologia Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil
| | | | - Airan Protazio
- Instituto de Biologia Universidade Federal da Bahia Salvador Brazil
- Departamento de Ensino Instituto Federal de Educação, Ciência e Tecnologia da Bahia Irecê Brazil
| | - Judit K. Szabo
- Instituto de Biologia Universidade Federal da Bahia Salvador Brazil
- College of Engineering, IT and Environment Charles Darwin University Darwin Northern Territory Australia
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Nonlinear spatial and temporal decomposition provides insight for climate change effects on sub-Arctic herbivore populations. Oecologia 2022; 198:889-904. [PMID: 35325288 DOI: 10.1007/s00442-022-05150-7] [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: 10/23/2021] [Accepted: 03/06/2022] [Indexed: 10/18/2022]
Abstract
Global temperatures are increasing, affecting timing and availability of vegetation along with relationships between plants and their consumers. We examined the effect of population density, herd body condition in the previous year, elevation, plant productivity and phenology, snow, and winter onset on juvenile body mass in 63 semi-domesticated populations of Rangifer tarandus throughout Norway using spatiotemporal generalized additive models (GAMs) and varying coefficient models (VCMs). Optimal climate windows were calculated at both the regional and national level using a novel nonlinear climate window algorithm optimized for prediction. Spatial and temporal variation in effects of population and environmental predictors were considered using a model including covariates decomposed into spatial, temporal, and residual components. The performance of this decomposed model was compared to spatiotemporal GAMs and VCMs. The decomposed model provided the best fit and lowest prediction errors. A positive effect of herd body condition in the previous year explained most of the deviance in calf body mass, followed by a more complex effect of population density. A negative effect of timing of spring and positive effect of winter onset on juvenile body mass suggested that a snow free season was positive for juvenile body mass growth. Our findings suggest early spring onset and later winter permanent snow cover as reinforcers of early-life conditions which support more robust reindeer populations. Our methodological improvements for climate window analyses and effect size measures for decomposed variables provide important contributions to account for, measure, and interpret nonlinear relationships between climate and animal populations at large scales.
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Rosa LC, Dias ECS, Melo RS, Rosário CJRMD, Pereira FLC, Chung LBO, Anunciação ARDAD, Moraes Junior FDJ, Souza FA, Chaves RDM. The ovarian and uterine responses of Baixadeiro mares to prostaglandin synchronization during the dry and rainy seasons. Anim Reprod 2022; 19:e20200050. [PMID: 35154436 PMCID: PMC8826974 DOI: 10.1590/1984-3143-ar2020-0050] [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: 07/12/2021] [Accepted: 12/11/2021] [Indexed: 11/25/2022] Open
Abstract
This study aimed to evaluate the effect of synchronization with prostaglandin F2α in Baixadeiro mares during the rainy and dry seasons. Fourteen mares were synchronized by administering two doses of 1 mL prostaglandin PGF 2α and monitored by rectal palpation and ultrasound for the assessment of follicular development and uterine echotexture. Of this total, nine mares allowed the collection of blood, in which the blood was collected by venipuncture of the jugular vein to determine progesterone (P4) by ELISA. Mares showed no differences (P > 0.05) in weight, body score condition (BSC), tone, uterine edema, frequency of ovulation, synchronization interval, estrus, and the total number of follicles between periods. However, there was a difference in large increased follicle diameter (P < 0.05) during the dry season. The average concentrations of P4 in mares differed (P < 0.05) between the pre- and post-ovulatory phases for both seasons and after ovulation, with higher concentrations in the rainy season. Furthermore, statistical differences in daily light (P < 0.05) were observed between the dry and rainy periods. Thus, we conclude that mares from the genetic grouping Baixadeiro showed no reproductive seasonality, though there was a difference in luminosity between the rainy and dry seasons. The treatment with two doses of PGF 2α was effective in synchronizing the mares, promoting the return of estrus in the dry and rainy periods. The mares remaining cyclically active throughout the year provided there were appropriate forage availability and quality levels to allow for normal values of body weight and condition.
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7
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Brogi R, Merli E, Grignolio S, Chirichella R, Bottero E, Apollonio M. It is time to mate: population-level plasticity of wild boar reproductive timing and synchrony in a changing environment. Curr Zool 2021; 68:371-380. [PMID: 36090138 PMCID: PMC9450171 DOI: 10.1093/cz/zoab077] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2021] [Accepted: 09/13/2021] [Indexed: 11/12/2022] Open
Abstract
Abstract
On a population level, individual plasticity in reproductive phenology can provoke either anticipations or delays in the average reproductive timing in response to environmental changes. However, a rigid reliance on photoperiodism can constraint such plastic responses in populations inhabiting temperate latitudes. The regulation of breeding season length may represent a further tool for populations facing changing environments. Nonetheless, this skill was reported only for equatorial, nonphotoperiodic populations. Our goal was to evaluate whether species living in temperate regions and relying on photoperiodism to trigger their reproduction may also be able to regulate breeding season length. During 10 years, we collected 2,500 female reproductive traits of a mammal model species (wild boar Sus scrofa) and applied a novel analytical approach to reproductive patterns in order to observe population-level variations of reproductive timing and synchrony under different weather and resources availability conditions. Under favorable conditions, breeding seasons were anticipated and population synchrony increased (i.e., shorter breeding seasons). Conversely, poor conditions induced delayed and less synchronous (i.e., longer) breeding seasons. The potential to regulate breeding season length depending on environmental conditions may entail a high resilience of the population reproductive patterns against environmental changes, as highlighted by the fact that almost all mature females were reproductive every year.
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Affiliation(s)
- Rudy Brogi
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, Sassari I-07100, Italy
| | - Enrico Merli
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, Sassari I-07100, Italy
| | - Stefano Grignolio
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, Sassari I-07100, Italy
| | - Roberta Chirichella
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, Sassari I-07100, Italy
| | - Elisa Bottero
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, Sassari I-07100, Italy
| | - Marco Apollonio
- Department of Veterinary Medicine, University of Sassari, via Vienna 2, Sassari I-07100, Italy
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8
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Maternal effects in mammals: Broadening our understanding of offspring programming. Front Neuroendocrinol 2021; 62:100924. [PMID: 33992652 DOI: 10.1016/j.yfrne.2021.100924] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/18/2021] [Accepted: 05/11/2021] [Indexed: 12/17/2022]
Abstract
The perinatal period is a sensitive time in mammalian development that can have long-lasting consequences on offspring phenotype via maternal effects. Maternal effects have been most intensively studied with respect to two major conditions: maternal diet and maternal stress. In this review, we shift the focus by discussing five major additional maternal cues and their influence on offspring phenotype: maternal androgen levels, photoperiod (melatonin), microbiome, immune regulation, and milk composition. We present the key findings for each of these topics in mammals, their mechanisms of action, and how they interact with each other and with the maternal influences of diet and stress. We explore their impacts in the contexts of both predictive adaptive responses and the developmental origins of disease, identify knowledge gaps and research opportunities in the field, and place a particular emphasis on the application and consideration of these effects in non-model species and natural ecological systems.
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9
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Clauss M, Zerbe P, Bingaman Lackey L, Codron D, Müller DWH. Basic considerations on seasonal breeding in mammals including their testing by comparing natural habitats and zoos. Mamm Biol 2020. [DOI: 10.1007/s42991-020-00078-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AbstractSeasonal reproduction is common in mammals. Whereas specific conditions triggering a seasonal response can only be identified in controlled experiments, large-scale comparisons of reproduction in natural habitats and zoos can advance knowledge for taxa unavailable for experimentation. We outline how such a comparison can identify species whose seasonal physiology is linked to photoperiodic triggers, and those whose perceived seasonality in the wild is the consequence of fluctuating resources without a photoperiodic trigger. This concept groups species into those that do not change their aseasonal pattern between natural habitats and zoos because they are not constrained by resources in the wild, those that do not change a seasonal pattern between natural habitats and zoos because they are triggered by photoperiod irrespective of resources, and those that change from a more seasonal pattern in the natural habitat to an aseasonal pattern in zoos because the zoo environment alleviates resource limitations experienced in the wild. We explain how detailed comparisons of mating season timing in both environments can provide clues whether a specific daylength or a specific number of days after an equinox or solstice is the likely phototrigger for a taxon. We outline relationships between life history strategies and seasonality, with special focus on relative shortening of gestation periods in more seasonal mammals. Irrespective of whether such shortening results from the adaptive value of fitting a reproductive cycle within one seasonal cycle (minimizing ‘lost opportunity’), or from benefits deriving from separating birth and mating (to optimize resource use, or to reduce infanticide), reproductive seasonality may emerge as a relevant driver of life history acceleration. Comparisons of data from natural habitats and zoos will facilitate testing some of the resulting hypotheses.
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10
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Kasiringua E, Procheş Ş, Kopij G. Long-Term Population Dynamics of African Ungulates in Waterberg Plateau National Park, Namibia. POLISH JOURNAL OF ECOLOGY 2020. [DOI: 10.3161/15052249pje2019.67.4.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Evert Kasiringua
- Discipline of Geography, University of KwaZulu-Natal, Westville Campus, PB X54001, Durban 4000, South Africa
| | - Şerban Procheş
- Discipline of Geography, University of KwaZulu-Natal, Westville Campus, PB X54001, Durban 4000, South Africa
| | - Grzegorz Kopij
- Department of Integrated Environmental Science, University of Namibia, Ogongo Campus, Private Bag 5520 Oshakati, Namibia
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11
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Reproduction in female wild cattle: Influence of seasonality on ARTs. Theriogenology 2020; 150:396-404. [PMID: 32081408 DOI: 10.1016/j.theriogenology.2020.02.016] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Accepted: 02/08/2020] [Indexed: 12/31/2022]
Abstract
Wild cattle species, often considered less alluring than certain conservation-dependent species, have not attracted the same level of interest as the charismatic megafauna from the general public, private or corporate donors, and other funding agencies. Currently, most wild cattle populations are vulnerable or threatened with extinction. The implementation of reproductive technologies to maintain genetically healthy cattle populations in situ and ex situ has been considered for more than 30 years. Protocols developed for domestic cattle breeds have been used with some success in various wild cattle species. However, inherent differences in the natural life history of these species makes extrapolation of domestic cattle protocols difficult, and in some cases, minimally effective. Reproductive seasonality, driven by either photoperiod or nutritional resource availability, has significant influence on the success of assisted reproductive technologies (ARTs). This review focuses on the physiological processes that differ in breeding (ovulatory) and non-breeding (anovulatory) seasons in female cattle, and the potential methods used to overcome these challenges. Techniques to be discussed within the context of seasonality include: estrus synchronization and ovulation induction, ovarian superstimulation, artificial insemination (AI), multiple ovulation embryo transfer (MOET), and ovum pick-up (OPU) with in vitro fertilization (IVF) and embryo transfer (ET).
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12
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McNutt JW, Groom R, Woodroffe R. Ambient temperature provides an adaptive explanation for seasonal reproduction in a tropical mammal. J Zool (1987) 2019. [DOI: 10.1111/jzo.12712] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- J. W. McNutt
- Botswana Predator Conservation Trust Maun Botswana
| | - R. Groom
- Institute of Zoology London UK
- African Wildlife Conservation Fund Birchenough Bridge Zimbabwe
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13
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Maia KM, Souza ALP, Silva AM, Souza-Jr JBF, Costa LLM, Brandão FZ, Oliveira MF, Comizzoli P, Silva AR. Environmental effects on collared peccaries (Pecari tajacu) serum testosterone, testicular morphology, and semen quality in the Caatinga biome. Theriogenology 2018; 126:286-294. [PMID: 30597387 DOI: 10.1016/j.theriogenology.2018.12.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 12/14/2018] [Accepted: 12/20/2018] [Indexed: 12/30/2022]
Abstract
The objective of the study was to understand the influence of climatic variations in a semiarid environment on serum testosterone, testicular morphology and semen quality in collared peccaries (Pecari tajacu). Reproductive metrics (semen quality, testicular morphometry and testosterone serum profiles) of 10 mature males were measured monthly for 18 months. Meteorological data (rainfall, air temperature, relative humidity, wind speed and radiant heat load) also were recorded during the same period. Rainfall regimes were classified in different classes (Class 1: months with no rain; Class 2: months with up to 50 mm of rain; and Class 3: months with >50 mm of rain). Among rainfall classes, average air temperature (°C) and relative humidity (%) were different. Climatic changes between rainfall classes did not lead to overall variations of testicular size, testosterone production, and semen metrics. However, relative humidity recorded before semen collection (one day, one week, or over 51-55 days) was positively correlated (P < 0.05) with semen motility metrics (total motility, beat cross frequency and straightness) and sperm subpopulations (medium and static sperm), as well as with volume. Negative correlations (P < 0.05) were revealed between air temperature and the same semen motility patterns and volume. Additionally, radiant head load measured on the day of semen collection negatively influenced (P < 0.05) sperm straightness. This study demonstrates for the first time that no seasonal changes could be detected overt the 18-month period on the serum testosterone, testicular morphology and semen quality of collared peccaries raised in the Caatinga biome; however, it is expected that long term environmental changes will influence the reproductive physiology of species leaving in that habitat.
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Affiliation(s)
- K M Maia
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil
| | - A L P Souza
- Programa de Pós-Graduação em Biotecnologia, Universidade Federal do Ceará, Sobral, Brazil
| | - A M Silva
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil
| | - J B F Souza-Jr
- Laboratório de Biometeorologia, Biofísica Ambiental e Bem-Estar Animal (LABBEA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN, Brazil
| | - L L M Costa
- Laboratório de Biometeorologia, Biofísica Ambiental e Bem-Estar Animal (LABBEA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), Mossoró, RN, Brazil
| | - F Z Brandão
- Departamento de Patologia e Clínica Veterinária, Faculdade de Veterinária, Universidade Federal Fluminense (UFF), Rua Vital Brasil Filho, 64, 24320-340, Niteroi, RJ, Brazil
| | - M F Oliveira
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil
| | - P Comizzoli
- Smithsonian Conservation Biology Institute, National Zoological Park, P.O. Box 37012, MRC 5502, Washington, DC, 20008, USA
| | - A R Silva
- Laboratory of Animal Germplasm Conservation (LCGA), Departamento de Ciências Animais, Universidade Federal Rural do Semi-Árido (UFERSA), BR 110, Km 47, Costa e Silva, CEP: 59625-900, Mossoró, Brazil.
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14
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Hufenus R, Schiffmann C, Hatt JM, Müller DWH, Lackey LB, Clauss M, Zerbe P. Seasonality of reproduction in Asian elephantsElephas maximusand African elephantsLoxodonta africana: underlying photoperiodic cueing? Mamm Rev 2018. [DOI: 10.1111/mam.12133] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Rahel Hufenus
- Clinic for Zoo Animals; Exotic Pets and Wildlife; Vetsuisse Faculty; University of Zurich; Winterthurerstr. 260 8057 Zurich Switzerland
| | - Christian Schiffmann
- Clinic for Zoo Animals; Exotic Pets and Wildlife; Vetsuisse Faculty; University of Zurich; Winterthurerstr. 260 8057 Zurich Switzerland
| | - Jean-Michel Hatt
- Clinic for Zoo Animals; Exotic Pets and Wildlife; Vetsuisse Faculty; University of Zurich; Winterthurerstr. 260 8057 Zurich Switzerland
| | | | - Laurie Bingaman Lackey
- World Association of Zoos and Aquariums; IUCN Conservation Centre; Rue Mauverney 28 1196 Gland Switzerland
| | - Marcus Clauss
- Clinic for Zoo Animals; Exotic Pets and Wildlife; Vetsuisse Faculty; University of Zurich; Winterthurerstr. 260 8057 Zurich Switzerland
| | - Philipp Zerbe
- Clinic for Zoo Animals; Exotic Pets and Wildlife; Vetsuisse Faculty; University of Zurich; Winterthurerstr. 260 8057 Zurich Switzerland
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15
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Appleton RD, Van Horn RC, Noyce KV, Spady TJ, Swaisgood RR, Arcese P. Phenotypic plasticity in the timing of reproduction in Andean bears. J Zool (1987) 2018. [DOI: 10.1111/jzo.12553] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- R. D. Appleton
- Department of Forest and Conservation Sciences; University of British Columbia; Vancouver BC Canada
- Spectacled Bear Conservation Society; Batan Grande La Quinta; Lambayeque Peru
| | - R. C. Van Horn
- San Diego Zoo Institute for Conservation Research; Escondido CA USA
| | - K. V. Noyce
- International Association for Bear Research and Management; Warba MN USA
| | - T. J. Spady
- Department of Biological Sciences; California State University San Marcos; San Marcos CA USA
| | - R. R. Swaisgood
- San Diego Zoo Institute for Conservation Research; Escondido CA USA
| | - P. Arcese
- Department of Forest and Conservation Sciences; University of British Columbia; Vancouver BC Canada
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Wojtusik J, Brown JL, Pukazhenthi BS. Non-invasive hormonal characterization of the ovarian cycle, pregnancy, and seasonal anestrus of the female addra gazelle (Nanger dama ruficollis). Theriogenology 2017; 95:96-104. [PMID: 28460687 DOI: 10.1016/j.theriogenology.2017.02.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/20/2017] [Accepted: 02/27/2017] [Indexed: 11/19/2022]
Abstract
Non-invasive fecal hormone metabolite monitoring was used to characterize the estrous cycle, pregnancy, and seasonal anestrus of the critically endangered addra gazelle (Nanger dama ruficollis). With less than 250 animals remaining in the wild and ∼168 individuals managed in captivity, it is crucial to maintain sustainable populations. Progestogen and estrogen profiles were obtained from analysis of fecal samples collected approximately every other day, within varying intervals, over the course of 7 years (n = 8 adult females). Average estrous cycle length was 19.5 ± 0.4 days (range, 14-26 days), with a luteal phase length of 14.6 ± 1.2 days (range, 10-16 days), and an inter-luteal period of 5.2 ± 1.4 days (range, 2-7 days). Mean gestation length for six pregnancies was 200.7 ± 0.4 days (range, 200-202 days). Fecal progestogens increased at 12 weeks of gestation and remained elevated until parturition. Addra gazelle females exhibited a period of seasonal anestrus with consistently low progestogen concentrations and no cyclic activity from about September to March. Analysis of reproductive and climate records demonstrated a peak in U.S. births that coincided with maximal rainfall in the native habitat of the addra gazelle. Results show that estrous cycle, luteal phase, and inter-luteal phase lengths in addra are similar to those observed in other gazelle species, however, to our knowledge, this is the first study to demonstrate seasonal anestrus in the Nanger genus.
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Affiliation(s)
- Jessye Wojtusik
- Smithsonian Conservation Biology Institute, National Zoological Park, Center for Species Survival, 1500 Remount Rd., Front Royal, VA 22630, USA; George Mason University, Department of Environmental Science and Policy, 4400 University Dr., Fairfax, VA 22030, USA
| | - Janine L Brown
- Smithsonian Conservation Biology Institute, National Zoological Park, Center for Species Survival, 1500 Remount Rd., Front Royal, VA 22630, USA
| | - Budhan S Pukazhenthi
- Smithsonian Conservation Biology Institute, National Zoological Park, Center for Species Survival, 1500 Remount Rd., Front Royal, VA 22630, USA.
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