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Gluttony in migratory waders - unprecedented energy assimilation rates in vertebrates

Kvist, Anders LU and Lindström, Åke LU (2003) In Oikos 103(2). p.397-402
Abstract
Maximum energy assimilation rate has been implicated as a constraint on maximal sustained energy expenditure, on biomass production, and in various behavioural and life history models. Data on the upper limit to energy assimilation rate are scarce, and the factors that set the limit remain poorly known. We studied migratory waders in captivity, given unlimited food supply around the clock. Many of these waders assimilated energy at rates of seven to ten times basal metabolism, exceeding maximum rates reported for vertebrates during periods of high energy demand, for example during reproduction and in extreme cold. One factor allowing the high energy assimilation rates may be that much of the assimilated energy is stored and not... (More)
Maximum energy assimilation rate has been implicated as a constraint on maximal sustained energy expenditure, on biomass production, and in various behavioural and life history models. Data on the upper limit to energy assimilation rate are scarce, and the factors that set the limit remain poorly known. We studied migratory waders in captivity, given unlimited food supply around the clock. Many of these waders assimilated energy at rates of seven to ten times basal metabolism, exceeding maximum rates reported for vertebrates during periods of high energy demand, for example during reproduction and in extreme cold. One factor allowing the high energy assimilation rates may be that much of the assimilated energy is stored and not concomitantly expended by muscles or other organs. The remarkable digestive capacity in waders is probably an adaptation to long and rapid migrations, putting a premium on high energy deposition rates. The upper limit to daily energy assimilation in vertebrates is clearly higher than hitherto believed, and food availability, total daily feeding time and, possibly, the fate of assimilated energy may be important factors to take into account when estimating limits to energy budgets in animals. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Oikos
volume
103
issue
2
pages
397 - 402
publisher
Wiley-Blackwell
external identifiers
  • wos:000186985700014
  • scopus:0345015419
ISSN
1600-0706
DOI
10.1034/j.1600-0706.2003.12259.x
language
English
LU publication?
yes
id
7d18fae7-2448-4740-b9c3-b9f61d1e7f65 (old id 137128)
date added to LUP
2007-06-25 12:15:58
date last changed
2018-01-07 06:22:50
@article{7d18fae7-2448-4740-b9c3-b9f61d1e7f65,
  abstract     = {Maximum energy assimilation rate has been implicated as a constraint on maximal sustained energy expenditure, on biomass production, and in various behavioural and life history models. Data on the upper limit to energy assimilation rate are scarce, and the factors that set the limit remain poorly known. We studied migratory waders in captivity, given unlimited food supply around the clock. Many of these waders assimilated energy at rates of seven to ten times basal metabolism, exceeding maximum rates reported for vertebrates during periods of high energy demand, for example during reproduction and in extreme cold. One factor allowing the high energy assimilation rates may be that much of the assimilated energy is stored and not concomitantly expended by muscles or other organs. The remarkable digestive capacity in waders is probably an adaptation to long and rapid migrations, putting a premium on high energy deposition rates. The upper limit to daily energy assimilation in vertebrates is clearly higher than hitherto believed, and food availability, total daily feeding time and, possibly, the fate of assimilated energy may be important factors to take into account when estimating limits to energy budgets in animals.},
  author       = {Kvist, Anders and Lindström, Åke},
  issn         = {1600-0706},
  language     = {eng},
  number       = {2},
  pages        = {397--402},
  publisher    = {Wiley-Blackwell},
  series       = {Oikos},
  title        = {Gluttony in migratory waders - unprecedented energy assimilation rates in vertebrates},
  url          = {http://dx.doi.org/10.1034/j.1600-0706.2003.12259.x},
  volume       = {103},
  year         = {2003},
}