Document Detail

Cardiorespiratory adjustments of homing pigeons to steady wind tunnel flight.
MedLine Citation:
PMID:  16081609     Owner:  NLM     Status:  MEDLINE    
We made detailed cardiorespiratory measurements from homing pigeons during quiet rest and steady wind tunnel flight. Our pigeons satisfied their 17.4-fold increase in oxygen consumption during flight with a 7.4-fold increase in cardiac output (Q) and a 2.4-fold increase in blood oxygen extraction. Q was increased primarily by increasing heart rate sixfold. Comparisons between our study and those from the only other detailed cardiorespiratory study on flying birds reveal a number of similarities and important differences. Although the avian allometric equations from this earlier study accurately predicted the flight Q of our pigeons, this was primarily due to due to compensating discrepancies in their heart rate and stroke volume predictions. Additionally, the measured heart mass (MH)-specific Q (Q/MH) of our pigeons during wind tunnel flight was about 22% lower than the estimated value. Compared to running mammals in previous studies, the 1.65-fold Q of our pigeons is consistent with their larger heart mass.
Grant W Peters; Dee A Steiner; Jason A Rigoni; Alexia D Mascilli; Robert W Schnepp; Steven P Thomas
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Journal of experimental biology     Volume:  208     ISSN:  0022-0949     ISO Abbreviation:  J. Exp. Biol.     Publication Date:  2005 Aug 
Date Detail:
Created Date:  2005-08-05     Completed Date:  2006-02-06     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0243705     Medline TA:  J Exp Biol     Country:  England    
Other Details:
Languages:  eng     Pagination:  3109-20     Citation Subset:  IM    
Department of Biological Sciences, Duquesne University, Pittsburgh, PA 15282, USA.
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MeSH Terms
Body Temperature
Cardiac Output / physiology
Columbidae / physiology*
Flight, Animal / physiology*
Heart / anatomy & histology*,  physiology
Heart Rate
Hydrogen-Ion Concentration
Organ Size
Oxygen / blood
Oxygen Consumption / physiology
Stroke Volume
Reg. No./Substance:

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