Document Detail

Relationship between avian growth rate and immune response depends on food availability.
MedLine Citation:
PMID:  17575041     Owner:  NLM     Status:  MEDLINE    
Life history theory predicts that when resources are limited growing organisms are likely to trade an immune response for competing demands of growth. To test this we examined the effect of energy intake on body mass increments and an immune response in hand-reared sand martin (Riparia riparia) nestlings. We subjected the nestlings to three different feeding regimes, mimicking the range of food availability in the wild, and then evaluated nestlings' immune response to phytohaemagglutinin (PHA). Direction of correlation between the magnitude of PHA-induced swelling response and body mass increments depended on food availability: it was negative when food was scarce and positive when resources were plentiful. There was no significant correlation between the two traits under intermediate feeding conditions. We conclude that the relative cost of immune function in young birds depends on food availability and, therefore, may be modified by external factors such as weather conditions or hatching asynchrony.
Paweł Brzek; Marek Konarzewski
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  210     ISSN:  0022-0949     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  2007 Jul 
Date Detail:
Created Date:  2007-06-18     Completed Date:  2007-09-07     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  2361-7     Citation Subset:  IM    
Department of Animal Ecology, University of Białystok, Swierkowa 20B, 15-950 Białystok, Poland.
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MeSH Terms
Birds / growth & development*,  immunology*
Body Weight
Energy Metabolism
Food Deprivation*
Phytohemagglutinins / immunology
Reg. No./Substance:

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