NDLI: Energetic and developmental costs of mounting an immune response in greenfinches (Carduelis chloris)

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Energetic and developmental costs of mounting an immune response in greenfinches (Carduelis chloris)

Content Provider	Springer Nature Link
Author	Amat, Juan A. Aguilera, Eduardo Visser, G. Henk
Copyright Year	2006
Abstract	It is assumed that there is a trade-off between the costs allocated to mounting an immune defence and those allocated to costly functions such as breeding and moulting. The physiological basis for this is that mounting an immune response to pathogen challenge has energetic and/or nutrient costs which may interfere with metabolic processes of the challenged individual. If the energetic costs of mounting an immune response are not too high, animals may face such costs by increasing their acquisition of food energy, suggesting that limited nutrients may be responsible for the costs of immune defence. We assessed the energetic and developmental costs of mounting an immune response in an experiment in captivity with first-year greenfinches (Carduelis chloris) challenged with sheep red blood cells and Brucella abortus. Antibody production against both antigens increased the daily energy expenditure (4.7%) of immune-challenged birds relative to control birds, although the difference was non-significant. We estimated that the maximum effect size supported by the data would be 9.9% higher in immune-challenged birds relative to control birds. We plucked the two outermost rectrices of each bird to assess the effects of the immune challenge on growth of the regenerated feathers. The immune challenge had no significant effect on the length of the regenerated rectrices. However, these feathers were more asymmetric in length in immune-challenged birds than in control birds. Although first-year male greenfinches paid a relatively low energetic cost when mounting an immune response, we suggest that immune-challenged individuals may have paid some costs over the long term based on the increased fluctuating asymmetry in the developing feathers.
Starting Page	282
Ending Page	287
Page Count	6
File Format	PDF
ISSN	09123814
Journal	Ecological Research
Volume Number	22
Issue Number	2
e-ISSN	14401703
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-08-17
Publisher Place	Tokyo
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carduelis chloris Energetic costs Fluctuating asymmetry Immune response Trade-offs Forestry Behavioural Sciences Evolutionary Biology Zoology Plant Sciences Ecology
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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