Fiche du document
2011
- doi: 10.1002/jez.693
- issn: 1932-5223
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/doi/10.1002/jez.693
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/pmid/21732546
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/eissn/1932-5231
Ce document est lié à :
info:eu-repo/semantics/altIdentifier/urn/urn:nbn:ch:serval-BIB_B352E2B2D6313
info:eu-repo/semantics/openAccess , Copying allowed only for non-profit organizations , https://serval.unil.ch/disclaimer
Sujets proches
Live-bearing reproduction ViviparousCiter ce document
J. Bleu et al., « Mating does not influence reproductive investment, in a viviparous lizard. », Serveur académique Lausannois, ID : 10.1002/jez.693
Métriques
Partage / Export
Résumé
Mating is crucial for females that reproduce exclusively sexually and should influence their investment into reproduction. Although reproductive adjustments in response to mate quality have been tested in a wide range of species, the effect of exposure to males and mating per se has seldom been studied. Compensatory mechanisms against the absence of mating may evolve more frequently in viviparous females, which pay higher direct costs of reproduction, due to gestation, than oviparous females. To test the existence of such mechanisms in a viviparous species, we experimentally manipulated the mating opportunity of viviparous female lizard, Lacerta (Zootoca) vivipara. We assessed the effect of mating on ovulation, postpartum body condition and parturition date, as well as on changes in locomotor performances and body temperatures during the breeding cycle. Female lizards ovulated spontaneously and mating had no influence on litter size, locomotor impairment or on selected body temperature. However, offspring production induced a more pronounced locomotor impairment and physical burden than the production of undeveloped eggs. Postpartum body condition and parturition dates were not different among females. This result suggests that gestation length is not determined by an embryonic signal. In the common lizard, viviparity is not associated with facultative ovulation and a control of litter size after ovulation, in response to the absence of mating.