Viability of brown trout embryos positively linked to melanin-based but negatively to carotenoid-based colours of their fathers.

Détails

Ressource 1Télécharger: BIB_AB75D0670C8E.P001.pdf (293.71 [Ko])
Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_AB75D0670C8E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Viability of brown trout embryos positively linked to melanin-based but negatively to carotenoid-based colours of their fathers.
Périodique
Proceedings of the Royal Society B Biological Sciences
Auteur(s)
Wedekind C., Jacob A., Evanno G., Nusslé S., Müller R.
ISSN
0962-8452[print], 0962-8452[linking]
Statut éditorial
Publié
Date de publication
2008
Peer-reviewed
Oui
Volume
275
Numéro
1644
Pages
1737-1744
Langue
anglais
Résumé
'Good-genes' models of sexual selection predict significant additive genetic variation for fitness-correlated traits within populations to be revealed by phenotypic traits. To test this prediction, we sampled brown trout (Salmo trutta) from their natural spawning place, analysed their carotenoid-based red and melanin-based dark skin colours and tested whether these colours can be used to predict offspring viability. We produced half-sib families by in vitro fertilization, reared the resulting embryos under standardized conditions, released the hatchlings into a streamlet and identified the surviving juveniles 20 months later with microsatellite markers. Embryo viability was revealed by the sires' dark pigmentation: darker males sired more viable offspring. However, the sires' red coloration correlated negatively with embryo survival. Our study demonstrates that genetic variation for fitness-correlated traits is revealed by male colour traits in our study population, but contrary to predictions from other studies, intense red colours do not signal good genes.
Mots-clé
Animals, Carotenoids/physiology, Female, Genetic Variation, Male, Melanins/physiology, Pigmentation/physiology, Statistics, Nonparametric, Trout/embryology, Trout/genetics
Pubmed
Web of science
Open Access
Oui
Création de la notice
07/04/2008 17:50
Dernière modification de la notice
08/05/2019 23:33
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