Recovery from Swimming-Induced Hypothermia in King Penguins: Effects of Nutritional Condition

Hdl Handle:
http://hdl.handle.net/10142/40467
Title:
Recovery from Swimming-Induced Hypothermia in King Penguins: Effects of Nutritional Condition
Authors:
Halsey, Lewis G.; Handrich, Y.; Rey, B.; Fahlman, A.; Woakes, A.J.; Butler, P.J.
Abstract:
We investigated changes in the rate of oxygen consumption ( ) and body temperature of wild king penguins (Aptenodytes ˙ Vo2 patagonicus) in different nutritional conditions during recovery after exposure to cold water. Over time, birds undertook an identical experiment three times, each characterized by different nutritional conditions: (1) having recently completed a foraging trip, (2) after fasting for many days, and (3) having been refed one meal after the fast. The experiments consisted of a 2-h session in a water channel followed by a period of recovery in a respirometer chamber on land. Refed birds recovered significantly more quickly than fed birds, in terms of both time to reach resting on land and time to reach recovery of lower ˙ Vo2 abdominal temperature. Previous work found that when penguins are in cold water, abdominal temperatures decrease less in refed birds than in fed or fasted birds, suggesting that refed birds may be vasoconstricting the periphery while perfusing the gut region to access nutrients. This, alongside an increased resting , seems the most reasonable explanation for why ˙ Vo2 refed birds recovered more quickly subsequent to cold-water exposure in this study; that is, vasoconstriction of the insulative periphery meant that they lost less heat generated by the body core.
Journal:
Physiological and Biochemical Zoology
Issue Date:
2008
URI:
http://hdl.handle.net/10142/40467
DOI:
10.1086/589546
Type:
Article
Language:
en
ISSN:
15222152; 15375293
Appears in Collections:
Department of Life Sciences Collection

Full metadata record

DC FieldValue Language
dc.contributor.authorHalsey, Lewis G.-
dc.contributor.authorHandrich, Y.-
dc.contributor.authorRey, B.-
dc.contributor.authorFahlman, A.-
dc.contributor.authorWoakes, A.J.-
dc.contributor.authorButler, P.J.-
dc.date.accessioned2008-11-07T09:31:10Z-
dc.date.available2008-11-07T09:31:10Z-
dc.date.issued2008-
dc.identifier.issn15222152-
dc.identifier.issn15375293-
dc.identifier.doi10.1086/589546-
dc.identifier.urihttp://hdl.handle.net/10142/40467-
dc.description.abstractWe investigated changes in the rate of oxygen consumption ( ) and body temperature of wild king penguins (Aptenodytes ˙ Vo2 patagonicus) in different nutritional conditions during recovery after exposure to cold water. Over time, birds undertook an identical experiment three times, each characterized by different nutritional conditions: (1) having recently completed a foraging trip, (2) after fasting for many days, and (3) having been refed one meal after the fast. The experiments consisted of a 2-h session in a water channel followed by a period of recovery in a respirometer chamber on land. Refed birds recovered significantly more quickly than fed birds, in terms of both time to reach resting on land and time to reach recovery of lower ˙ Vo2 abdominal temperature. Previous work found that when penguins are in cold water, abdominal temperatures decrease less in refed birds than in fed or fasted birds, suggesting that refed birds may be vasoconstricting the periphery while perfusing the gut region to access nutrients. This, alongside an increased resting , seems the most reasonable explanation for why ˙ Vo2 refed birds recovered more quickly subsequent to cold-water exposure in this study; that is, vasoconstriction of the insulative periphery meant that they lost less heat generated by the body core.en
dc.description.provenanceSubmitted by Pat Simons (p.simons@roehampton.ac.uk) on 2008-11-07T09:08:55Z No. of bitstreams: 1 Halsey et al (2008) Recovery from hypothermia in kings.pdf: 169158 bytes, checksum: a63b73abec50de8b4970a1bd913b49c8 (MD5)en
dc.description.provenanceApproved for entry into archive by Pat Simons(p.simons@roehampton.ac.uk) on 2008-11-07T09:31:09Z (GMT) No. of bitstreams: 1 Halsey et al (2008) Recovery from hypothermia in kings.pdf: 169158 bytes, checksum: a63b73abec50de8b4970a1bd913b49c8 (MD5)en
dc.description.provenanceMade available in DSpace on 2008-11-07T09:31:10Z (GMT). No. of bitstreams: 1 Halsey et al (2008) Recovery from hypothermia in kings.pdf: 169158 bytes, checksum: a63b73abec50de8b4970a1bd913b49c8 (MD5) Previous issue date: 2008en
dc.language.isoenen
dc.subjectKing penguinsen
dc.subjectbody temperatureen
dc.subjectoxygen comsumptionen
dc.subjectfastingen
dc.subjectnutritionen
dc.titleRecovery from Swimming-Induced Hypothermia in King Penguins: Effects of Nutritional Conditionen
dc.typeArticleen
dc.identifier.journalPhysiological and Biochemical Zoologyen
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