Document Detail

The effects of temperature and artificial rain on the metabolism of American kestrels (Falco sparverius).
MedLine Citation:
PMID:  15556396     Owner:  NLM     Status:  MEDLINE    
The effect of rainfall on the metabolism of birds is poorly understood. We measured the metabolism as rate of oxygen consumption (VO2) of four male and four female American kestrels (Falco sparverius) using open-circuit respirometry. We measured VO2 during the spring at ambient temperatures (Ta) of 5, 10, 15, and 25 degrees C in air without rainfall and with simulated rainfall of 2.5 (low rainfall) and 6.1 cm h(-1) (high rainfall). Kestrel metabolism was significantly higher when exposed to the two rainfall levels compared to no rainfall. However, kestrel metabolism was not significantly different at the two rainfall levels. Body temperature (Tb) was significantly lower under high rainfall compared to low rainfall. In addition, under both rainfall levels Tb decreased with decreasing Ta. Calculated thermal conductance was significantly higher in kestrels exposed to rain compared to no rainfall. Kestrels may use sleeking behavior at high rainfall levels to decrease water penetration of the plumage. Daily energy expenditure (DEE) of kestrels exposed to rain may increase markedly, and kestrel energetics may be further exacerbated by wind that often accompanies natural rainstorms.
Glenn R Wilson; Sheldon J Cooper; James A Gessaman
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology     Volume:  139     ISSN:  1095-6433     ISO Abbreviation:  Comp. Biochem. Physiol., Part A Mol. Integr. Physiol.     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2004-11-23     Completed Date:  2005-04-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9806096     Medline TA:  Comp Biochem Physiol A Mol Integr Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  389-94     Citation Subset:  IM    
Department of Biology, Utah State University, Logan, UT 84322, USA.
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MeSH Terms
Falconiformes / metabolism*

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

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