Stratégie reproductrice d'une espèce de lézard à pontes multiples (Podarcis muralis) dans un environnement contraignant
type: Dataset
description: Living organisms are exposed to environmental fluctuations (including temperature) at the daily, seasonal or annual scale. In ectotherms, environmental temperature directly affects body temperature and thus the physiology, locomotory performance, activity and ultimately the fitness of individuals. Embryonic development is a very sensitive step to thermal fluctuations and ectotherms have deployed a variety of means to buffer its effects. In annual multiple clutches species, reproduction spread over an extended period during which the seasonal thermal conditions vary widely. These fluctuations can profoundly constrain the activity of the individuals and affect developmental trajectories. Determinants of reproductive success thus involve the consideration of environmental constraints as well as ontogéniques trajectories. Indeed, in indeterminate growth species, the nature of allocation trade-offs should strongly depends on the size and age of the individuals. Ontogenetic changes in strategies for resource allocation are expected to optimize reproductive success. In this thesis, we examined the reproductive strategies in a species with multiple clutches, the wall lizard (Podarcis muralis) in a thermally challenging context (oceanic climate, Central West of France). Using an experimental approach, we demonstrated the strong impact of thermal conditions on the quality of embryonic development and the importance of phenology (laying date) on individual trajectories. Early laying dates and incubation temperatures promote high survival of juveniles. The population monitoring initiated in 2006 has highlighted the importance of age and body size of females in the allocation trade-offs. Thus older individuals cease to allocate their resources in growth and encourage the capitalization of energy. This ontogenic shift supports a higher reproductive effort and a earlier engagement in reproduction. Energy constraints induced by reproduction have also been revealed by studying the s…
landing page: https://theses.hal.science/tel-00686826
keyword: compromis-dallocation
keyword: corticosterone
keyword: developpement-embryonnaire
keyword: ectotherme
keyword: infoeu-reposemanticsdoctoralthesis
keyword: plasticite-phenotypique
keyword: qualite-individuelle
keyword: sdeenvironmental-sciences
keyword: temperature
keyword: theses
keyword: trajectoire-ontogenique
issued: 2026-05-22T05:27:12.995345
modified: 2026-05-22T05:27:12.995351
language: fr
contact point: Organization
  fn: CCSD

test_moissonnage_selune
type: Agent

Stratégie reproductrice d'une espèce de lézard à pontes multiples (Podarcis muralis) dans un environnement contraignant
type: Distribution
format: HTML
access URL: https://theses.hal.science/tel-00686826
issued: 2026-05-22T05:27:13.005189
modified: 2026-05-22T05:27:12.971859