Proximate mechanisms of variation in the carotenoid-based plumage coloration of nestling great tits (Parus major L.)
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چکیده
منابع مشابه
Proximate mechanisms of variation in the carotenoid-based plumage coloration of nestling great tits (Parus major L.).
Many vertebrates use carotenoid-based signals in social or sexual interactions. Honest signalling via carotenoids implies some limitation of carotenoid-based colour expression among phenotypes in the wild, and at least five limiting proximate mechanisms have been hypothesized. Limitation may arise by carotenoid-availability, genetic constraints, body condition, parasites, or detrimental effects...
متن کاملNo evidence for survival selection on carotenoid-based nestling coloration in great tits (Parus major).
In several vertebrate species evidence supports the hypothesis that carotenoid-based coloration of adults has evolved due to sexual selection. However, in some birds already the nestlings display carotenoid-based coloration. Because the nestling's body plumage is typically moulted before the first reproductive event, sexual selection cannot explain the evolution of these carotenoid-based traits...
متن کاملCarotenoid diet and nestling provisioning in urban and rural great tits Parus major
Considering the importance of dietary constraints for the widely held view of carotenoid pigmentation as an honest quality indicator, there is surprisingly little data on carotenoid availability in different natural diets or along environmental gradients. Here we investigate the carotenoid availability in the main diet of breeding great tits Parus major , living in urban and rural environments ...
متن کاملDissecting carotenoid from structural components of carotenoid-based coloration: a field experiment with great tits (Parus major).
Carotenoid-based yellowish to red plumage colors are widespread visual signals used in sexual and social communication. To understand their ultimate signaling functions, it is important to identify the proximate mechanism promoting variation in coloration. Carotenoid-based colors combine structural and pigmentary components, but the importance of the contribution of structural components to var...
متن کاملEffects of common origin and common environment on nestling plumage coloration in the great tit (Parus major).
Carotenoids cannot be synthesized by birds and thus have to be ingested with food, suggesting that carotenoid-based plumage coloration is environmentally determined. However signaling functions ascribed to plumage imply that plumage coloration is the outcome of an evolutionary process based on genetic variation. By means of a cross-fostering design we show significant effects of both a common r...
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ژورنال
عنوان ژورنال: Journal of Evolutionary Biology
سال: 2003
ISSN: 1010-061X,1420-9101
DOI: 10.1046/j.1420-9101.2003.00483.x