11 results on '"Gaëtan Guiller"'
Number of results to display per page
Search Results
2. Contribution of host species and pathogen clade to snake fungal disease hotspots in Europe
- Author
-
Gaëlle Blanvillain, Jeffrey M. Lorch, Nicolas Joudrier, Stanislaw Bury, Thibault Cuenot, Michael Franzen, Fernando Martínez-Freiría, Gaëtan Guiller, Bálint Halpern, Aleksandra Kolanek, Katarzyna Kurek, Olivier Lourdais, Alix Michon, Radka Musilová, Silke Schweiger, Barbara Szulc, Sylvain Ursenbacher, Oleksandr Zinenko, and Joseph R. Hoyt
- Subjects
Biology (General) ,QH301-705.5 - Abstract
Abstract Infectious diseases are influenced by interactions between host and pathogen, and the number of infected hosts is rarely homogenous across the landscape. Areas with elevated pathogen prevalence can maintain a high force of infection and may indicate areas with disease impacts on host populations. However, isolating the ecological processes that result in increases in infection prevalence and intensity remains a challenge. Here we elucidate the contribution of pathogen clade and host species in disease hotspots caused by Ophidiomyces ophidiicola, the pathogen responsible for snake fungal disease, in 21 species of snakes infected with multiple pathogen strains across 10 countries in Europe. We found isolated areas of disease hotspots in a landscape where infections were otherwise low. O. ophidiicola clade had important effects on transmission, and areas with multiple pathogen clades had higher host infection prevalence. Snake species further influenced infection, with most positive detections coming from species within the Natrix genus. Our results suggest that both host and pathogen identity are essential components contributing to increased pathogen prevalence.
- Published
- 2024
- Full Text
- View/download PDF
3. Rare genetic admixture and unidirectional gene flow between Vipera aspis and Vipera berus at their contact zone in western France
- Author
-
Valerie Zwahlen, Olivier Lourdais, Sylvain Ursenbacher, and Gaëtan Guiller
- Subjects
Animal Science and Zoology ,Ecology, Evolution, Behavior and Systematics - Abstract
Asp vipers (Vipera aspis) and adders (Vipera berus) coexist in the Loire-Atlantique department in France where the two species reach their respective range limits. This contact zone is of special interest since hybridization has been recently discovered there. We carried out extensive sampling to further investigate the hybrid status of morphologically typical individuals and to evaluate the proportion of genetically admixed individuals in this area. Using microsatellite markers, no hybrids with typical morphological traits of either asp vipers or adders were detected. All recently investigated individuals with intermediate morphological traits were shown to be hybrids. A rather low proportion of genetically admixed individuals (1.5-3%) and a very small number of supposed second-generation hybrids suggest reduced fertility of first-generation hybrids or low viability of their progeny. The investigation of mtDNA of newly sampled hybrids support the finding that hybridization only occurs between female V. aspis and male V. berus. Several possible explanations for the unidirectional hybridization are discussed and consequent future studies suggested.
- Published
- 2022
- Full Text
- View/download PDF
4. Hotspots for snake fungal disease across Europe are maintained by host and pathogen identity
- Author
-
Gaëlle Blanvillain, Jeffrey M. Lorch, Nicolas Joudrier, Stanislaw Bury, Thibault Cuenot, Michael Franzen, Fernando Martínez Freiría, Gaëtan Guiller, Bálint Halpern, Aleksandra Kolanek, Katarzyna Kurek, Olivier Lourdais, Alix Michon, Radka Musilová, Silke Schweiger, Barbara Szulc, Sylvain Ursenbacher, Oleksandr Zinenko, and Joseph R. Hoyt
- Abstract
Infectious diseases are influenced by interactions between host and pathogens in variable environments and are rarely homogenous across the landscape. Areas with elevated pathogen burden and transmission may indicate a disruption to steady-state disease dynamics. However, isolating processes that result in increases in infection prevalence and intensity remains a challenge. Here we elucidate the contribution of host species, and pathogen clade in disease hotspots. We examined broad-scale patterns of infection ofO. ophidiicola, the pathogen that causes snake fungal disease, in 21 species of snakes across 10 countries in Europe. Disease hotspots were evident across several regions in Europe, and our analyses revealed significant differences in infection based on host species and pathogen clade. Over 80% of positive detections were from host species in theNatrixgenus, indicating potential higher susceptibility in this group. The presence ofO. ophidiicolagenotypes that have been associated with more severe disease in North America, also resulted in high rates of infection compared to genotypes only described from Europe. Elevated infection prevalence was best explained by an interaction between host and pathogen identity which was not uniform across all species. More broadly, these findings present important mechanisms underlying disease hotspots across a disease endemic region.
- Published
- 2022
- Full Text
- View/download PDF
5. Diverse aging rates in ectothermic tetrapods provide insights for the evolution of aging and longevity
- Author
-
Beth A. Reinke, Hugo Cayuela, Fredric J. Janzen, Jean-François Lemaître, Jean-Michel Gaillard, A. Michelle Lawing, John B. Iverson, Ditte G. Christiansen, Iñigo Martínez-Solano, Gregorio Sánchez-Montes, Jorge Gutiérrez-Rodríguez, Francis L. Rose, Nicola Nelson, Susan Keall, Alain J. Crivelli, Theodoros Nazirides, Annegret Grimm-Seyfarth, Klaus Henle, Emiliano Mori, Gaëtan Guiller, Rebecca Homan, Anthony Olivier, Erin Muths, Blake R. Hossack, Xavier Bonnet, David S. Pilliod, Marieke Lettink, Tony Whitaker, Benedikt R. Schmidt, Michael G. Gardner, Marc Cheylan, Françoise Poitevin, Ana Golubović, Ljiljana Tomović, Dragan Arsovski, Richard A. Griffiths, Jan W. Arntzen, Jean-Pierre Baron, Jean-François Le Galliard, Thomas Tully, Luca Luiselli, Massimo Capula, Lorenzo Rugiero, Rebecca McCaffery, Lisa A. Eby, Venetia Briggs-Gonzalez, Frank Mazzotti, David Pearson, Brad A. Lambert, David M. Green, Nathalie Jreidini, Claudio Angelini, Graham Pyke, Jean-Marc Thirion, Pierre Joly, Jean-Paul Léna, Anton D. Tucker, Col Limpus, Pauline Priol, Aurélien Besnard, Pauline Bernard, Kristin Stanford, Richard King, Justin Garwood, Jaime Bosch, Franco L. Souza, Jaime Bertoluci, Shirley Famelli, Kurt Grossenbacher, Omar Lenzi, Kathleen Matthews, Sylvain Boitaud, Deanna H. Olson, Tim S. Jessop, Graeme R. Gillespie, Jean Clobert, Murielle Richard, Andrés Valenzuela-Sánchez, Gary M. Fellers, Patrick M. Kleeman, Brian J. Halstead, Evan H. Campbell Grant, Phillip G. Byrne, Thierry Frétey, Bernard Le Garff, Pauline Levionnois, John C. Maerz, Julian Pichenot, Kurtuluş Olgun, Nazan Üzüm, Aziz Avcı, Claude Miaud, Johan Elmberg, Gregory P. Brown, Richard Shine, Nathan F. Bendik, Lisa O’Donnell, Courtney L. Davis, Michael J. Lannoo, Rochelle M. Stiles, Robert M. Cox, Aaron M. Reedy, Daniel A. Warner, Eric Bonnaire, Kristine Grayson, Roberto Ramos-Targarona, Eyup Baskale, David Muñoz, John Measey, F. Andre de Villiers, Will Selman, Victor Ronget, Anne M. Bronikowski, David A. W. Miller, Northeastern Illinois University, Pennsylvania State University (Penn State), Penn State System, Department of Ecology and Evolution [Lausanne], Université de Lausanne = University of Lausanne (UNIL), Iowa State University (ISU), W. K. Kellogg Biological Station (KBS), Michigan State University [East Lansing], Michigan State University System-Michigan State University System, Laboratoire de Biométrie et Biologie Evolutive - UMR 5558 (LBBE), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Recherche en Informatique et en Automatique (Inria)-VetAgro Sup - Institut national d'enseignement supérieur et de recherche en alimentation, santé animale, sciences agronomiques et de l'environnement (VAS)-Centre National de la Recherche Scientifique (CNRS), Texas A&M University [College Station], Earlham College, Partenaires INRAE, Department of Evolutionary Biology and Environmental Studies, Universität Zürich [Zürich] = University of Zurich (UZH), Museo Nacional de Ciencias Naturales [Madrid] (MNCN), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Centro de Investigaciones Biológicas (CSIC), Department of Biological Sciences [Lubbock], Texas Tech University [Lubbock] (TTU), School of Biological Sciences [Wellington, New Zealand], Victoria University of Wellington, Tour du Valat, Research Institute for the conservation of Mediterranean Wetlands, Auteur indépendant, Department of Conservation Biology [UFZ Leipzig], Helmholtz Zentrum für Umweltforschung = Helmholtz Centre for Environmental Research (UFZ), Research Institute on Terrestrial Ecosystems [CNR, Italy] (IRET), Consiglio Nazionale delle Ricerche (CNR), Le Grand Momesson, Bouvron, France, Denison University, Fort Collins Science Center (FORT), US Geological Survey [Fort Collins], United States Geological Survey [Reston] (USGS)-United States Geological Survey [Reston] (USGS), University of Montana, Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Forest and Rangeland Ecosystem Science Center (FRESC), Info Fauna Karch 2000, Flinders University [Adelaide, Australia], Evolutionary Biology Unit, South Australian Museum, Université Paul-Valéry - Montpellier 3 (UPVM), University of Belgrade [Belgrade], Macedonian Ecological Society, University of Kent [Canterbury], Naturalis Biodiversity Center [Leiden], CEREEP-Ecotron Ile de France (UMS 3194), Département de Biologie - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris ), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Institute for Development, Ecology, Conservation and Cooperation [Rome, Italy], Rivers State University of Science and Technology, Université de Lomé [Togo], Museo Civico di Zoologia, U.S. Geological Survey, Forest and Rangeland Ecosystem Science Center, Wildlife Biology Program, Department of Wildlife Ecology and Conservation, University of Florida, Department of Biodiversity, Conservation and Attractions [Australia], Parks and Wildlife Service of Northern Territory, Colorado State University [Fort Collins] (CSU), Redpath Museum, McGill University = Université McGill [Montréal, Canada], Kunming Institute of Botany [CAS] (KIB), Chinese Academy of Sciences [Beijing] (CAS), Macquarie University, Association Objectifs Biodiversités (OBIOS), Équipe 4 - Écophysiologie, Comportement, Conservation (E2C), Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés (LEHNA), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Centre National de la Recherche Scientifique (CNRS), CSIRO, EcoSciences Precinct, StatiPOP, scientific consulting, Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UPVM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut Agro Montpellier, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Université de Montpellier (UM), Conservatoire d'Espaces Naturels de Nouvelle-Aquitaine, Ohio State University [Columbus] (OSU), Northern Illinois University, California Department of Fish and Wildlife, Universidad de Oviedo [Oviedo], Department of Biology [Mato Grosso], Universidade do Estado de Mato Grosso (UNEMAT), Escola Superior de Agricultura 'Luiz de Queiroz' (ESALQ), Universidade de São Paulo = University of São Paulo (USP), Royal Melbourne Institute of Technology University (RMIT University), University of the Highlands and Islands (UHI), Naturhistorisches Museum [Bern], USDA Forest Service Rocky Mountain Forest and Range Experiment Station, United States Department of Agriculture (USDA), Deakin University [Waurn Ponds], Palmerston North Research Centre, Plant & Food Research, Station d'écologie théorique et expérimentale (SETE), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Universidad Austral de Chile, ONG Ranita de Darwin, U.S Geological Survey, Patuxent Wildlife Research Center, SO Conte Anadromous Fish Laboratory, School of Earth and Environmental Sciences [Wollongong], Faculty of Science, Medicine and Health [Wollongong], University of Wollongong [Australia]-University of Wollongong [Australia], Université de Rennes (UNIV-RENNES), Office national des forêts (ONF), University of Georgia [USA], Centre de Recherche et de Formation en Eco-éthologie (2C2A-CERFE), Université de Reims Champagne-Ardenne (URCA), Adnan Menderes Üniversitesi, University College of Kristianstad, Watershed Protection Department, Cornell Lab of Ornithology [New York], Cornell University [New York], Indiana University School of Medicine, Indiana University System, University of Virginia, Auburn University (AU), University of Richmond, Ministerio de Ciencia, Tecnología y Medio Ambiente (CITMA), Pamukkale University, Stellenbosch University, Millsaps College, Éco-Anthropologie (EA), Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS), This study was supported by National Institutes of Health grant R01AG049416 (to A.M.B., F.J.J., and D.A.W.M.). H.C. was supported as a postdoctoral researcher by the Swiss National Science Foundation (grant no. 31003A_182265)., Office National des Forêts (ONF), University of Virginia [Charlottesville], Éco-Anthropologie (EAE), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Université Paul-Valéry - Montpellier 3 (UPVM)-École Pratique des Hautes Études (EPHE), Université de Toulouse (UT)-Université de Toulouse (UT)-Observatoire Midi-Pyrénées (OMP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Université de Rennes (UR), and Cornell Laboratory of Ornithology
- Subjects
life history ,demography ,Aging ,phenotype ,[SDV]Life Sciences [q-bio] ,Longevity ,tetrapod ,ectothermy ,phylogeny ,Amphibia ,Amphibians ,VERTEBRADOS ,evolution ,Animals ,animal ,Multidisciplinary ,nonhuman ,article ,Reptiles ,mortality ,Biological Evolution ,phylogenetics ,reptile ,GN ,[SDE]Environmental Sciences ,environmental temperature ,body size - Abstract
Comparative studies of mortality in the wild are necessary to understand the evolution of aging; yet, ectothermic tetrapods are underrepresented in this comparative landscape, despite their suitability for testing evolutionary hypotheses. We present a study of aging rates and longevity across wild tetrapod ectotherms, using data from 107 populations (77 species) of nonavian reptiles and amphibians. We test hypotheses of how thermoregulatory mode, environmental temperature, protective phenotypes, and pace of life history contribute to demographic aging. Controlling for phylogeny and body size, ectotherms display a higher diversity of aging rates compared with endotherms and include phylogenetically widespread evidence of negligible aging. Protective phenotypes and life-history strategies further explain macroevolutionary patterns of aging. Analyzing ectothermic tetrapods in a comparative context enhances our understanding of the evolution of aging.
- Published
- 2022
- Full Text
- View/download PDF
6. La prairie permanente non pâturée : un habitat souvent délaissé pour la conservation des Squamates du bocage
- Author
-
Gaëtan GUILLER and Jean-Pierre VACHER
- Subjects
General Engineering ,General Earth and Planetary Sciences ,General Environmental Science - Abstract
Les recommandations de gestion d’habitat en faveur des Squamates terrestres s’intéressent principalement aux éléments bordiers et délaissent souvent les habitats ouverts comme les prairies. L’observation visuelle et la surveillance régulière d’un réseau de plaques refuges positionnées sur les lisières et le centre d’une prairie permanente non pâturée ont permis de suivre une communauté de Squamates pendant une année au sein du département de la Loire-Atlantique. Nos résultats montrent qu’il existe des différences dans l’exploration de la prairie permanente non pâturée selon les espèces, le mode de thermorégulation, l’âge des individus et le moment de l’année. Les Lacertidae tendent à rester près des lisières, alors que les Serpents et les Orvets fragiles s’aventurent plus loin dans la prairie au cours du temps. Néanmoins, la richesse spécifique diminue lorsque la distance à la lisière augmente. Cette étude nous éclaire sur l’importance de la prise en compte des prairies permanentes non pâturées pour la conservation des Squamates en milieu bocager.
- Published
- 2022
- Full Text
- View/download PDF
7. How often do they do it? An in-depth analysis of the hybrid zone of two grass snake species (Natrix astreptophora and Natrix helvetica)
- Author
-
Philippe Geniez, Claudine Delmas, Nadine Schultze, Matthieu Berroneau, Marika Asztalos, Uwe Fritz, Carolin Kindler, Jérôme Legentilhomme, Flora Ihlow, and Gaëtan Guiller
- Subjects
0106 biological sciences ,0301 basic medicine ,biology ,Grass snake ,Zoology ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Natrix ,Natrix astreptophora ,03 medical and health sciences ,030104 developmental biology ,Hybrid zone ,Ecology, Evolution, Behavior and Systematics - Abstract
We examined the contact zone of two parapatric species of grass snake (Natrix astreptophora and Natrix helvetica) in southern France. To this end, we used comprehensive sampling, analysed mtDNA sequences and microsatellite loci, and built Species Distribution Models for current and past climatic conditions. The contact zone had established by the mid-Holocene during range expansions from glacial refuges in the Iberian Peninsula (N. astreptophora) and southern or western France (N. helvetica). The contact zone represents a narrow bimodal hybrid zone, with steep genetic transition from one taxon to the other and rare hybridization, supporting species status for N. astreptophora and N. helvetica. Our results suggest that the steepness of the clines is a more robust tool for species delimitation than cline width. In addition, we discovered in western France, beyond the hybrid zone, a remote population of N. helvetica with genetic signatures of hybridization with N. astreptophora, most likely the result of human-mediated long-distance dispersal. For N. helvetica, we identified a southern and a northern population cluster, connected by broad-scale gene flow in a unimodal hybrid zone running across France. This pattern either reflects genetic divergence caused by allopatry in two microrefuges and subsequent secondary contact or introgression of foreign alleles into the southern cluster.
- Published
- 2020
- Full Text
- View/download PDF
8. Water deprivation compromises maternal physiology and reproductive success in a cold and wet adapted snake
- Author
-
Mathias, Dezetter, Jean François, Le Galliard, Gaëtan, Guiller, Michaël, Guillon, Mathieu, Leroux-Coyau, Sandrine, Meylan, François, Brischoux, Fréderic, Angelier, and Olivier, Lourdais
- Subjects
reproduction ,water deprivation ,Dehydration ,fecundity ,AcademicSubjects/SCI00840 ,Research Article ,trade-off - Abstract
Droughts are becoming more intense and frequent with climate change. These extreme weather events can lead to mass mortality and reproduction failure, and therefore cause population declines. Understanding how the reproductive physiology of organisms is affected by water shortages will help clarify whether females can adjust their reproductive strategy to dry conditions or may fail to reproduce and survive. In this study, we investigated the consequences of a short period of water deprivation (2 weeks) during early pregnancy on the physiology and behaviour of a cold- and wet-adapted ectotherm (Vipera berus). We also examined water allocation to developing embryos and embryonic survival. Water-deprived females exhibited significant dehydration, physiological stress and loss of muscle mass. These effects of water deprivation on water balance and muscle loss were correlated with the number of developing embryos. While water-deprived females maintained water transfer to embryos at the expense of their own maintenance, water deprivation also led to embryonic mortality. Overall, water deprivation amplifies the reproductive costs of water allocation to support embryonic development. The deleterious impacts of water deprivation on female current reproductive performance and on potential survival and future reproduction could lead to severe population declines in this species.
- Published
- 2021
9. Water deprivation compromises maternal physiology and reproductive success in a cold and wet adapted snake Vipera berus
- Author
-
Frédéric Angelier, François Brischoux, Jean-François Le Galliard, Mathieu Leroux-Coyau, Mathias Dezetter, Gaëtan Guiller, Michaël Guillon, Sandrine Meylan, Olivier Lourdais, Institut d'écologie et des sciences de l'environnement de Paris (iEES Paris ), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), 1 Le Grand Momesson, 44130 Bouvron [France], ANR-17-CE02-0013,AQUATHERM,Rôles de la régulation hydrique et thermique dans les réponses écologiques au changement climatique(2017), Institut de Recherche pour le Développement (IRD)-Sorbonne Université (SU)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
- Subjects
0106 biological sciences ,Vipera berus ,Physiology ,media_common.quotation_subject ,fecundity ,Population ,Zoology ,Management, Monitoring, Policy and Law ,Trade-off ,010603 evolutionary biology ,01 natural sciences ,Maternal Physiology ,reproduction ,03 medical and health sciences ,Water balance ,water deprivation ,education ,030304 developmental biology ,Nature and Landscape Conservation ,media_common ,trade-off ,0303 health sciences ,education.field_of_study ,biology ,Reproductive success ,Dehydration ,Ecological Modeling ,biology.organism_classification ,6. Clean water ,13. Climate action ,Ectotherm ,[SDE]Environmental Sciences ,Reproduction - Abstract
Droughts are becoming more intense and frequent with climate change. These extreme weather events can lead to mass mortality and reproduction failure, and therefore cause population declines. Understanding how the reproductive physiology of organisms is affected by water shortages will help clarify whether females can adjust their reproductive strategy to dry conditions or may fail to reproduce and survive. In this study, we investigated the consequences of a short period of water deprivation (2 weeks) during early pregnancy on the physiology and behaviour of a cold- and wet-adapted ectotherm (Vipera berus). We also examined water allocation to developing embryos and embryonic survival. Water-deprived females exhibited significant dehydration, physiological stress and loss of muscle mass. These effects of water deprivation on water balance and muscle loss were correlated with the number of developing embryos. While water-deprived females maintained water transfer to embryos at the expense of their own maintenance, water deprivation also led to embryonic mortality. Overall, water deprivation amplifies the reproductive costs of water allocation to support embryonic development. The deleterious impacts of water deprivation on female current reproductive performance and on potential survival and future reproduction could lead to severe population declines in this species.
- Published
- 2021
- Full Text
- View/download PDF
10. Hydric 'costs' of reproduction: pregnancy increases evaporative water loss in the snake Vipera aspis
- Author
-
Bruno Michaud, Andréaz Dupoué, Gaëtan Guiller, Dale F. DeNardo, Michaël Guillon, Olivier Lourdais, Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Pierre et Marie Curie - Paris 6 (UPMC), School of Life Sciences, ASU, Arizona State University [Tempe] (ASU), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR), Centre d'études biologiques de Chizé (CEBC), Centre National de la Recherche Scientifique (CNRS), Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), and Institut National de la Recherche Agronomique (INRA)-La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
0106 biological sciences ,0301 basic medicine ,Physiology ,media_common.quotation_subject ,behavioral mitigation ,Biology ,010603 evolutionary biology ,01 natural sciences ,Biochemistry ,Sexual conflict ,03 medical and health sciences ,Water balance ,Viviparity, Nonmammalian ,medicine ,Viperidae ,viviparity ,Animals ,Vipera aspis ,media_common ,Pregnancy ,Ecology ,physiological trade-off ,Cost of reproduction ,medicine.disease ,biology.organism_classification ,Water Loss, Insensible ,Water resources ,030104 developmental biology ,Hydric soil ,[SDE]Environmental Sciences ,Animal Science and Zoology ,Female ,Reproduction ,water loss - Abstract
International audience; Water constraints can mediate evolutionary conflict either among individuals (e.g., parent-offspring conflict, sexual conflict) or within an individual (e.g., cost of reproduction). During pregnancy, water is of particular importance because the female provides all water needed for embryonic development and experiences important maternal shifts in behavior and physiology that, together, can compromise female water balance if water availability is limited. We examined the effect of pregnancy on evaporative water loss and microhabitat selection in a viviparous snake, the aspic viper. We found that both physiological (increased metabolism and body temperature) and morphological (body distension) changes contribute to an increased evaporative water loss in pregnant females. We also found that pregnant females in the wild select warmer and moister basking locations than nonreproductive females, likely to mitigate the conflict between thermal needs and water loss. Water resources likely induce significant reproductive constraints across diverse taxa and thus warrant further consideration in ecological research. From an evolutionary perspective, water constraints during reproduction may contribute to shaping reproductive effort.
- Published
- 2017
- Full Text
- View/download PDF
11. Microclimate preferences correlate with contrasted evaporative water loss in parapatric vipers at their contact zone
- Author
-
Michaël Guillon, Gaëtan Guiller, Dale F. DeNardo, Olivier Lourdais, Université de Poitiers, Centre d'Études Biologiques de Chizé - UMR 7372 (CEBC), Institut National de la Recherche Agronomique (INRA)-Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS), Le Grand Momesson, School of Life Sciences, Arizona State University [Tempe] (ASU), Centre d'études biologiques de Chizé (CEBC), Centre National de la Recherche Scientifique (CNRS), and Université de La Rochelle (ULR)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)
- Subjects
0106 biological sciences ,Vipera berus ,Climatic adaptation ,Microclimate ,Parapatric speciation ,010603 evolutionary biology ,01 natural sciences ,parapatrie ,03 medical and health sciences ,Water balance ,Vipera aspis ,thermorégulation ,Ecology, Evolution, Behavior and Systematics ,030304 developmental biology ,0303 health sciences ,biology ,Ecology ,Thermoregulation ,biology.organism_classification ,pertes hydriques par évaporation ,Ectotherm ,[SDE]Environmental Sciences ,sélection de microhabitat ,Animal Science and Zoology - Abstract
International audience; Les ectothermes terrestres utilisent principalement des moyens comportementaux pour réguler leur température corporelle et optimiser leurs performances. La thermorégulation peut cependant imposer des contraintes physiologiques et augmenter par exemple les pertes hydriques. La balance hydrique est influencée par des facteurs externes (p. ex. propriétés du microhabitat, contraintes environnementales) mais aussi des facteurs endogènes (p. ex. taux de perte hydrique par évaporation, tolérance à la déshydratation). Si la thermorégulation et la balance hydrique sont étroitement liées, le rôle la balance hydrique est souvent sous-considéré dans l'évaluation des adaptations climatiques et de la sensibilité aux changements globaux. Nous avons étudié deux espèces congénériques de vipères (la vipère aspic, Vipera aspis (L., 1758), et la vipère péliade, Vipera berus (L., 1758)) avec des affinités climatiques contrastées (sud-Européenne contra boréale). Ces deux espèces ont des répartitions parapatriques mais sont localement syntopiques dans des zones étroites ou une séparation par l'habitat semble exister. Nous avons comparé les pertes hydriques par évaporation (totales et cutanées) et mesuré les conditions thermiques et hydriques des microhabitats utilisés dans une zone de syntopie. L'espèce boréale (V. berus) présente des pertes hydriques supérieures (totales et cutanées) à (V. aspis). De façon conjointe, cette espèce sélectionne des microhabitats plus humides tout au long de l'année. L'humidité semble donc être une composante importante de la sélection de l'habitat et V. berus est probablement plus vulnérable aux changements de précipitation en limite sud de son aire de distribution.
- Published
- 2014
- Full Text
- View/download PDF
Catalog
Books, media, physical & digital resources
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.