Genetic and environmental effects on the covariation betweencolour polymorphism and a life history trait

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Etat: Public
Version: de l'auteur
ID Serval
serval:BIB_80A067964B38
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Genetic and environmental effects on the covariation betweencolour polymorphism and a life history trait
Périodique
Evolutionary Ecology Research
Auteur(s)
Roulin A., Bize P., Ravussin P.A., Broch L.
ISSN
1522-0613
Statut éditorial
Publié
Date de publication
2004
Peer-reviewed
Oui
Volume
6
Numéro
8
Pages
1253-1260
Langue
anglais
Résumé
Variation in coloration with a strong underlying genetic basis is frequently found within animal populations but little is known about its function. Covariation between colour polymorphism and life-history traits can arise because morphs perform differently among environments or because they possess alternative alleles coding for key life-history traits. To test these two hypotheses, we studied a population of tawny owls Strix aluco, a bird displaying red, brown and grey morphs. We assessed the colour morph of breeding females, swapped eggs or hatchlings between pairs of nests, and examined how body condition in 3-week-old nestlings covaries with coloration of foster and genetic mothers. Redder foster and genetic mothers produced young in better condition. Because in two other years we observed that greyish females produced offspring in better condition than those of red females, the present study suggests that colour polymorphism signals genetic and phenotypic adaptations to cope with a fluctuating environment.
Mots-clé
colour polymorphism, disruptive selection, ecological niche
Web of science
Création de la notice
24/01/2008 18:42
Dernière modification de la notice
20/08/2019 15:41
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