Mating does not influence reproductive investment, in a viviparous lizard.
Détails
Etat: Public
Version: Final published version
ID Serval
serval:BIB_B352E2B2D631
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Mating does not influence reproductive investment, in a viviparous lizard.
Périodique
Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
ISSN
1932-5231 (Electronic)
ISSN-L
1932-5223
Statut éditorial
Publié
Date de publication
2011
Peer-reviewed
Oui
Volume
315
Numéro
8
Pages
458-464
Langue
anglais
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.
Mots-clé
Animals, Body Temperature, Egg Shell, Female, Litter Size, Lizards/physiology, Male, Ovulation, Reproduction/physiology, Sexual Behavior, Animal/physiology, Viviparity, Nonmammalian/physiology
Pubmed
Web of science
Open Access
Oui
Création de la notice
29/05/2011 22:05
Dernière modification de la notice
20/08/2019 16:21