Du är här

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

Författare:
Publiceringsår: 2009
Språk: Engelska
Sidor: 101-106
Publikation/Tidskrift/Serie: General and Comparative Endocrinology
Volym: 164
Nummer: 2-3
Dokumenttyp: Artikel
Förlag: Elsevier Science

Sammanfattning

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.

Disputation

Nyckelord

  • Biology and Life Sciences
  • Stress response
  • Corticosterone
  • Migration
  • Wind-tunnel
  • Endurance
  • flight

Övriga

Published
  • CAnMove
Yes
  • Molecular Ecology and Evolution Lab
  • ISSN: 0016-6480

Box 117, 221 00 LUND
Telefon 046-222 00 00 (växel)
Telefax 046-222 47 20
lu [at] lu [dot] se

 

Fakturaadress: Box 188, 221 00 LUND
Organisationsnummer: 202100-3211
Om webbplatsen