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Title

Carotenoid-Based Colours Reflect the Stress Response in the Common Lizard

AuthorsFitze, Patrick S. ; Cote, Julien; San José, Luis M. ; Meylan, Sandrine; Isaksson, Caroline; Andersson, Staffan; Rossi, Jean-Marc; Clobert, Jean
KeywordsCarotenoid-Based
Colouration
PSR
Lizard
Issue Date8-Apr-2009
PublisherPublic Library of Science
CitationPLoS ONE 4(4): e5111. (2009)
Abstract[Abstract] 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.
Description10 pages, 4 figures and 2 tables.
Publisher version (URL)http://dx.doi.org/10.1371/journal.pone.0005111
URIhttp://hdl.handle.net/10261/14128
DOI10.371/journal.pone.0005111
ISSN1932-6203
Appears in Collections:(MNCN) Artículos
(IPE) Artículos
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