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Are birds stressed during long-term flights? A wind-tunnel study on circulating corticosterone in the red knot

Jenni-Eiermann, Susanne; Hasselquist, Dennis LU ; Lindström, Åke LU ; Koolhaas, Anita and Piersma, Theunis (2009) In General and Comparative Endocrinology 164(2-3). p.101-106
Abstract
During endurance flight most birds do not feed and have to rely on their body reserves. Fat and protein is catabolised to meet the high energetic demands. Even though the hormonal regulation of migration is complex and not yet fully understood. the adrenocortical hormone corticosterone crystallizes to play a major role in controlling physiological traits in migratory birds during flight. However, results from field studies are partially equivocal, not least because data from birds during endurance flight are hard to get and present mostly a momentary shot. A wind-tunnel experiment offered the possibility to measure repeatedly under controlled conditions the effect of long flights on the stress hormone corticosterone. In a long-distance... (More)
During endurance flight most birds do not feed and have to rely on their body reserves. Fat and protein is catabolised to meet the high energetic demands. Even though the hormonal regulation of migration is complex and not yet fully understood. the adrenocortical hormone corticosterone crystallizes to play a major role in controlling physiological traits in migratory birds during flight. However, results from field studies are partially equivocal, not least because data from birds during endurance flight are hard to get and present mostly a momentary shot. A wind-tunnel experiment offered the possibility to measure repeatedly under controlled conditions the effect of long flights on the stress hormone corticosterone. In a long-distance migrating shorebird, the red knot Calidris canutus, we measured plasma concentrations of corticosterone within 3 min and after a restraint time of 30 min directly after 2 h and 10 h non-stop flights, respectively, and during rest. Baseline corticosterone levels were unchanged directly after the flights, indicating that endurance flight did not affect corticosterone levels. The adrenocortical response to restraint showed the typical rise in birds during rest, while birds after a 2 or 10 h flight substantially decreased plasma corticosterone concentrations. We suggest that the negative adrenocortical response to restraint after flight is part of the mechanism to reduce the proteolytic effect of corticosterone to save muscle protein and to avoid muscle damaging effects. (C) 2009 Elsevier Inc. All rights reserved. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Stress response, Corticosterone, Migration, Wind-tunnel, Endurance, flight
in
General and Comparative Endocrinology
volume
164
issue
2-3
pages
101 - 106
publisher
Elsevier
external identifiers
  • wos:000271500600001
  • scopus:70350020417
ISSN
0016-6480
DOI
10.1016/j.ygcen.2009.05.014
project
CAnMove
language
English
LU publication?
yes
id
58dc1749-454a-4d46-82ce-57551f3b2151 (old id 1520242)
date added to LUP
2009-12-28 10:19:05
date last changed
2017-02-26 03:36:49
@article{58dc1749-454a-4d46-82ce-57551f3b2151,
  abstract     = {During endurance flight most birds do not feed and have to rely on their body reserves. Fat and protein is catabolised to meet the high energetic demands. Even though the hormonal regulation of migration is complex and not yet fully understood. the adrenocortical hormone corticosterone crystallizes to play a major role in controlling physiological traits in migratory birds during flight. However, results from field studies are partially equivocal, not least because data from birds during endurance flight are hard to get and present mostly a momentary shot. A wind-tunnel experiment offered the possibility to measure repeatedly under controlled conditions the effect of long flights on the stress hormone corticosterone. In a long-distance migrating shorebird, the red knot Calidris canutus, we measured plasma concentrations of corticosterone within 3 min and after a restraint time of 30 min directly after 2 h and 10 h non-stop flights, respectively, and during rest. Baseline corticosterone levels were unchanged directly after the flights, indicating that endurance flight did not affect corticosterone levels. The adrenocortical response to restraint showed the typical rise in birds during rest, while birds after a 2 or 10 h flight substantially decreased plasma corticosterone concentrations. We suggest that the negative adrenocortical response to restraint after flight is part of the mechanism to reduce the proteolytic effect of corticosterone to save muscle protein and to avoid muscle damaging effects. (C) 2009 Elsevier Inc. All rights reserved.},
  author       = {Jenni-Eiermann, Susanne and Hasselquist, Dennis and Lindström, Åke and Koolhaas, Anita and Piersma, Theunis},
  issn         = {0016-6480},
  keyword      = {Stress response,Corticosterone,Migration,Wind-tunnel,Endurance,flight},
  language     = {eng},
  number       = {2-3},
  pages        = {101--106},
  publisher    = {Elsevier},
  series       = {General and Comparative Endocrinology},
  title        = {Are birds stressed during long-term flights? A wind-tunnel study on circulating corticosterone in the red knot},
  url          = {http://dx.doi.org/10.1016/j.ygcen.2009.05.014},
  volume       = {164},
  year         = {2009},
}