Title
Birds receiving extra carotenoids keep singing during the sickness phase induced by inflammation Birds receiving extra carotenoids keep singing during the sickness phase induced by inflammation
Author
Faculty/Department
Faculty of Sciences. Biology
Faculty of Social Sciences. Instructional and Educational Sciences
Publication type
article
Publication
Berlin ,
Subject
Psychology
Chemistry
Biology
Source (journal)
Behavioral ecology and sociobiology. - Berlin
Volume/pages
69(2015) :6 , p. 1029-1037
ISSN
0340-5443
ISI
000354227000017
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Life history theory predicts that individuals have to trade-off resources between diverse energy-demanding activities, such as mounting an immune response and performing advertisement behaviour. The availability of immunomodulatory micronutrients can affect this trade-off. Carotenoids can upregulate both the humoral and cell-mediated immune response, but little is known about their effect on behavioural traits during the sickness phase induced by a common inflammation. To investigate whether dietary carotenoids can mitigate the severity of the sickness syndrome and promote fitness-related traits, we studied how the song rate of captive male European starlings (Sturnus vulgaris, Linnaeus 1758) receiving dietary carotenoids and coping with a challenge (lipopolysaccharide, LPS) mimicking a bacterial infection varied during the sickness phase and the subsequent recovery phase. We found that birds not provisioned with carotenoids and injected with LPS sang less than control birds during the sickness phase, but not during the recovery phase. Conversely, birds provided access to a carotenoid-enriched diet never decreased their song rate. Our results show that immune-challenged birds have to trade-off between mounting an immune response and advertising only when their access to dietary carotenoids is limited. No differences in song rate were observed between treatments during the recovery phase. Our study is the first to investigate the role of dietary carotenoids on a behavioural syndrome-like sickness and to show that providing a carotenoid-rich diet can alleviate the social costs associated with the occurrence of an inflammation.
E-info
https://repository.uantwerpen.be/docman/iruaauth/018d7e/47a95fdea3d.pdf
Full text (open access)
https://repository.uantwerpen.be/docman/irua/7cb498/10071.pdf
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