Opportunity for sexual selection and effective population size in the lek-breeding European treefrog (Hyla arborea).

Détails

ID Serval
serval:BIB_C52CD731779F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Opportunity for sexual selection and effective population size in the lek-breeding European treefrog (Hyla arborea).
Périodique
Evolution
Auteur(s)
Broquet T., Jaquiéry J., Perrin N.
ISSN
1558-5646[electronic], 0014-3820[linking]
Statut éditorial
Publié
Date de publication
2009
Peer-reviewed
Oui
Volume
63
Numéro
3
Pages
674-683
Langue
anglais
Résumé
Sexual selection in lek-breeding species might drastically lower male effective population size, with potentially important consequences for evolutionary and conservation biology. Using field-monitoring and parental-assignment methods, we analyzed sex-specific variances in breeding success in a population of European treefrogs, to (1) help understanding the dynamics of genetic variance at sex-specific loci, and (2) better quantify the risk posed by genetic drift in this species locally endangered by habitat fragmentation. The variance in male mating success turned out to be markedly lower than values obtained from other amphibian species with polygamous mating systems. The ratio of effective breeding size to census breeding size was only slightly lower in males (0.44) than in females (0.57), in line with the patterns of genetic diversity previously reported from H. arborea sex chromosomes. Combining our results with data on age at maturity and adult survival, we show that the negative effect of the mating system is furthermore compensated by the effect of delayed maturity, so that the estimated instantaneous effective size broadly corresponded to census breeding size. We conclude that the lek-breeding system of treefrogs impacts only weakly the patterns of genetic diversity on sex-linked genes and the ability of natural populations to resist genetic drift.
Mots-clé
Animals, Anura/genetics, Ecosystem, Female, Male, Population Density, Sexual Behavior, Animal
Pubmed
Web of science
Open Access
Oui
Création de la notice
05/11/2008 12:24
Dernière modification de la notice
20/08/2019 16:40
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