Document Detail

The effects of variable foraging conditions on common murre (Uria aalge) corticosterone concentrations and parental provisioning.
MedLine Citation:
PMID:  17991465     Owner:  NLM     Status:  MEDLINE    
This study investigated how total corticosterone concentrations, chick-feeding rates, and adult body mass changed with food availability from 1998 to 2000 in the same individually marked common murres (Uria aalge). Capelin, the main prey species, arrived inshore by the onset of murre chick hatching in 1998 and 1999 (prey match years); whereas in 2000, hatching began approximately 1 week before the capelin arrived inshore to spawn (prey mismatch year). Serum corticosterone concentrations were higher in the same individuals in the prey mismatch year than they were in either of the match years. Birds sampled before peak capelin spawning in the mismatch year had higher corticosterone levels than murres sampled after peak spawning. Murres with higher corticosterone levels had higher chick-feeding rates and less mass loss in the mismatch year (compared to the match year 1999) than birds with lower levels. Corticosterone levels did not differ between birds that had not foraged for at least 12 h (brooded chick overnight) and those that had, suggesting that short-term food deprivation did not affect corticosterone concentrations. Taken together, these findings suggest that the difference between years reflects a baseline shift in corticosterone levels, particularly in the high-quality birds that were able to increase both corticosterone concentrations and foraging effort.
Lesley M Doody; Sabina I Wilhelm; Donald W McKay; Carolyn J Walsh; Anne E Storey
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-09-21
Journal Detail:
Title:  Hormones and behavior     Volume:  53     ISSN:  0018-506X     ISO Abbreviation:  Horm Behav     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2008-01-01     Completed Date:  2008-04-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0217764     Medline TA:  Horm Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  140-8     Citation Subset:  IM    
Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada A1B 3X9.
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MeSH Terms
Birds / metabolism*
Body Composition / physiology
Corticosterone / metabolism*
Energy Metabolism / physiology
Feeding Behavior / physiology
Food Deprivation / physiology*
Longitudinal Studies
Maternal Behavior / physiology*
Nesting Behavior / physiology*
Paternal Behavior*
Statistics, Nonparametric
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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