Title
Structural (UV) and carotenoid‐based plumage coloration signals for parental investment? Structural (UV) and carotenoid‐based plumage coloration signals for parental investment?
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
[Oxford] :Wiley-Blackwekk ,
Subject
Chemistry
Biology
Source (journal)
Ecology and evolution. - [Oxford], 2011, currens
Volume/pages
6(2016) :10 , p. 3269-3279
ISSN
2045-7758
ISI
000376646700019
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Parental care increases parental fitness through improved offspring condition and survival but comes at a cost for the caretaker(s). To increase life‐time fitness, caring parents are, therefore, expected to adjust their reproductive investment to current environmental conditions and parental capacities. The latter is thought to be signaled via ornamental traits of the bearer. We here investigated whether pre‐ and/or posthatching investment of blue tit (Cyanistes caeruleus) parents was related to ornamental plumage traits (UV crown coloration and carotenoid‐based plumage coloration) expressed by either the individual itself (i.e. good parent hypothesis) or its partner (i.e. differential allocation hypothesis). Our results show that neither prehatching (that is clutch size and offspring begging intensity) nor posthatching parental investment (provisioning rate, offspring body condition at fledging) was related to an individual's UV crown coloration or to that of its partner. Similar observations were made for carotenoid‐based plumage coloration, except for a consistent positive relationship between offspring begging intensity and maternal carotenoid‐based plumage coloration. This sex‐specific pattern likely reflects a maternal effect mediated via maternally derived egg substances, given that the relationship persisted when offspring were cross‐fostered. This suggests that females adjust their offspring's phenotype toward own phenotype, which may facilitate in particular mother‐offspring co‐adaptation. Overall, our results contribute to the current state of evidence that structural or pigment‐based plumage coloration of blue tits are inconsistently correlated with central life‐history traits.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/ada1fb/133702.pdf
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