Document Detail

Hematological condition indexes in greenfinches: effects of captivity and diurnal variation.
MedLine Citation:
PMID:  20078208     Owner:  NLM     Status:  MEDLINE    
Ecophysiological research aiming at explaining the causes and consequences of variation in individual condition, health state, and allostasis is traditionally performed on captive animals under controlled laboratory conditions. The question about how captivity per se affects studied parameters is therefore of central importance for generalizing the information gained from such studies. We addressed this question by comparing various indexes of physiological condition of wintering greenfinches sampled in the wild and kept in captivity for different time periods. Bringing wild greenfinches into captivity did not result in systematic alteration in nine of 12 physiological parameters studied. Captive birds had consistently lower plasma carotenoid and uric acid levels than wild ones. Variation in differential leukocyte counts did not reveal any signs of elevated stress of birds kept in captivity. These results indicate that for a number of physiological parameters, information obtained from captive animals can be generalized to natural situations. Variance in traits most closely related to physical exercise capacity (body mass and hematocrit) were much lower in the wild than in captivity. These findings suggest that under harsh environmental conditions experienced by wild birds (i.e., predation threat, scarce resources), traits such as hematocrit and body mass are fine tuned by physiological trade-offs.
Tuul Sepp; Elin Sild; Peeter H?rak
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Physiological and biochemical zoology : PBZ     Volume:  83     ISSN:  1537-5293     ISO Abbreviation:  Physiol. Biochem. Zool.     Publication Date:    2010 Mar-Apr
Date Detail:
Created Date:  2010-02-15     Completed Date:  2010-05-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100883369     Medline TA:  Physiol Biochem Zool     Country:  United States    
Other Details:
Languages:  eng     Pagination:  276-82     Citation Subset:  IM    
Institute of Ecology and Earth Sciences, Tartu University, Vanemuise 46, 51014 Tartu, Estonia.
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MeSH Terms
Animals, Laboratory / blood,  physiology
Animals, Wild / blood,  physiology
Body Size / physiology
Carotenoids / blood,  physiology
Circadian Rhythm / physiology*
Housing, Animal
Leukocyte Count / veterinary
Physical Conditioning, Animal / physiology
Songbirds / blood*,  physiology
Stress, Psychological / blood,  physiopathology
Triglycerides / blood,  physiology
Uric Acid / blood
Reg. No./Substance:
0/Triglycerides; 36-88-4/Carotenoids; 69-93-2/Uric Acid

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

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