Carotenoid-based colours reflect the stress response in the common lizard.
Détails
Etat: Public
Version: Final published version
Licence: Non spécifiée
ID Serval
serval:BIB_5E9AF04EFA9C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Carotenoid-based colours reflect the stress response in the common lizard.
Périodique
PLoS One
ISSN
1932-6203 (Electronic)
ISSN-L
1932-6203
Statut éditorial
Publié
Date de publication
2009
Peer-reviewed
Oui
Volume
4
Numéro
4
Pages
e5111
Langue
anglais
Résumé
Under chronic stress, carotenoid-based colouration has often been shown to fade. However, the ecological and physiological mechanisms that govern colouration still remain largely unknown. Colour changes may be directly induced by the stressor (for example through reduced carotenoid intake) or due to the activation of the physiological stress response (PSR, e.g. due to increased blood corticosterone concentrations). Here, we tested whether blood corticosterone concentration affected carotenoid-based colouration, and whether a trade-off between colouration and PSR existed. Using the common lizard (Lacerta vivipara), we correlatively and experimentally showed that elevated blood corticosterone levels are associated with increased redness of the lizard's belly. In this study, the effects of corticosterone did not depend on carotenoid ingestion, indicating the absence of a trade-off between colouration and PSR for carotenoids. While carotenoid ingestion increased blood carotenoid concentration, colouration was not modified. This suggests that carotenoid-based colouration of common lizards is not severely limited by dietary carotenoid intake. Together with earlier studies, these findings suggest that the common lizard's carotenoid-based colouration may be a composite trait, consisting of fixed (e.g. genetic) and environmentally elements, the latter reflecting the lizard's PSR.
Mots-clé
Animals, Carotenoids/metabolism, Chromatography, High Pressure Liquid, Color, Corticosterone/blood, Female, Lizards/physiology, Male, Pigments, Biological/metabolism, Spectrophotometry, Ultraviolet, Stress, Physiological
Pubmed
Web of science
Open Access
Oui
Création de la notice
12/11/2010 10:46
Dernière modification de la notice
17/09/2019 8:29