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Power and metabolic scope of bird flight: a phylogenetic analysis of biomechanical predictions

Hedenström, Anders LU (2008) In Journal of Comparative Physiology A 194(7). p.685-691
Abstract
For flying animals aerodynamic theory predicts that mechanical power required to fly scales as P proportional, variant m (7/6) in a series of isometric birds, and that the flight metabolic scope (P/BMR; BMR is basal metabolic rate) scales as P (scope) proportional, variant m (5/12). I tested these predictions by using phylogenetic independent contrasts from a set of 20 bird species, where flight metabolic rate was measured during laboratory conditions (mainly in wind tunnels). The body mass scaling exponent for P was 0.90, significantly lower than the predicted 7/6. This is partially due to the fact that real birds show an allometric scaling of wing span, which reduces flight cost. P (scope) was estimated using direct measurements of BMR... (More)
For flying animals aerodynamic theory predicts that mechanical power required to fly scales as P proportional, variant m (7/6) in a series of isometric birds, and that the flight metabolic scope (P/BMR; BMR is basal metabolic rate) scales as P (scope) proportional, variant m (5/12). I tested these predictions by using phylogenetic independent contrasts from a set of 20 bird species, where flight metabolic rate was measured during laboratory conditions (mainly in wind tunnels). The body mass scaling exponent for P was 0.90, significantly lower than the predicted 7/6. This is partially due to the fact that real birds show an allometric scaling of wing span, which reduces flight cost. P (scope) was estimated using direct measurements of BMR in combination with allometric equations. The body mass scaling of P (scope) ranged between 0.31 and 0.51 for three data sets, respectively, and none differed significantly from the prediction of 5/12. Body mass scaling exponents of P (scope) differed significantly from 0 in all cases, and so P (scope) showed a positive body mass scaling in birds in accordance with the prediction. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Bird flight energy cost - Metabolic scope - Aerodynamics - Phylogenetic contrasts - Scaling
in
Journal of Comparative Physiology A
volume
194
issue
7
pages
685 - 691
publisher
Springer
external identifiers
  • wos:000257374400008
  • scopus:46649109513
ISSN
1432-1351
DOI
10.1007/s00359-008-0345-z
language
English
LU publication?
yes
id
b3e68a2b-17e7-4a69-a91f-7bb67829eecd (old id 1169350)
date added to LUP
2009-01-14 10:42:01
date last changed
2017-11-12 03:50:27
@article{b3e68a2b-17e7-4a69-a91f-7bb67829eecd,
  abstract     = {For flying animals aerodynamic theory predicts that mechanical power required to fly scales as P proportional, variant m (7/6) in a series of isometric birds, and that the flight metabolic scope (P/BMR; BMR is basal metabolic rate) scales as P (scope) proportional, variant m (5/12). I tested these predictions by using phylogenetic independent contrasts from a set of 20 bird species, where flight metabolic rate was measured during laboratory conditions (mainly in wind tunnels). The body mass scaling exponent for P was 0.90, significantly lower than the predicted 7/6. This is partially due to the fact that real birds show an allometric scaling of wing span, which reduces flight cost. P (scope) was estimated using direct measurements of BMR in combination with allometric equations. The body mass scaling of P (scope) ranged between 0.31 and 0.51 for three data sets, respectively, and none differed significantly from the prediction of 5/12. Body mass scaling exponents of P (scope) differed significantly from 0 in all cases, and so P (scope) showed a positive body mass scaling in birds in accordance with the prediction.},
  author       = {Hedenström, Anders},
  issn         = {1432-1351},
  keyword      = {Bird flight energy cost - Metabolic scope - Aerodynamics - Phylogenetic contrasts - Scaling},
  language     = {eng},
  number       = {7},
  pages        = {685--691},
  publisher    = {Springer},
  series       = {Journal of Comparative Physiology A},
  title        = {Power and metabolic scope of bird flight: a phylogenetic analysis of biomechanical predictions},
  url          = {http://dx.doi.org/10.1007/s00359-008-0345-z},
  volume       = {194},
  year         = {2008},
}