Measurement of maximum oxygen consumption in guinea fowl Numida meleagris indicates that birds and mammals display a similar diversity of aerobic scopes during running

Title:
Measurement of maximum oxygen consumption in guinea fowl Numida meleagris indicates that birds and mammals display a similar diversity of aerobic scopes during running
Creator:
Ellerby, David J. (Author)
Cleary, MaryEllen (Author)
Marsh, Richard L. (Author)
Buchanan, Cindy I. (Author)
Language:
English
Publisher:
University of Chicago
Copyright date:
2003
Type of resource:
Text
Genre:
Articles
Format:
electronic
Digital origin:
born digital
Abstract/Description:
Judgement of exercise performance in birds has been hampered by a paucity of data on maximal aerobic capacity. We measured the maximal rate of oxygen consumption (V̇o2,max) in running guinea fowl Numida meleagris, a bird that has been used in several previous studies of avian running. Mean V̇o2,max during level treadmill running was 97.5±3.7 mL O&8322; kg-1 min-1 (mean ± SEM, N=5). V̇o2,max was on average 6% higher when the birds ran uphill compared with the value during level running (paired t-test, P=0.041, N=5). The mean basal rate of oxygen consumption (V̇o2,bmr) of the same individuals was 7.9±0.5 mL kg-1 min-1.Mean factorial aerobic scope based on individually measured values of V̇o2,max and V̇o2,bmr was 13.2 ± 0.6 (mean ± SEM, N=5). This value was considerably lower than the factorial aerobic scope previously measured during running in Rhea americana, a large flightless ratite. The difference in factorial scope between these two running birds likely reflects the effects of body size as well as size-independent differences in the ability to deliver and use oxygen. These data confirm a previous prediction that birds have a diversity of factorial aerobic scopes similar to that exhibited by mammals.
Comments:
Originally published in Physiological and Biochemical Zoology 76(5):695-703, 2003. DOI: 10.1086/376430
Subjects and keywords:
Guineafowl -- Physiology
Mammals -- Physiology
birds
guinea fowl
Numida meleagris
oxygen consumption
running
Poultry or Avian Science
Zoology
Permanent Link:
http://hdl.handle.net/2047/d20000612

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