Dive durations in pinnipeds and seabirds
Many endothermic divers regularly exceed the theoretical limit to the duration of aerobic dives, suggesting that assumptions about either the oxygen storage capacity of tissues or the metabolic rate of divers are wrong. This study examined the frequency distributions of dive durations in five specie...
Published in: | Canadian Journal of Zoology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
1996
|
Subjects: | |
Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/dive-durations-in-pinnipeds-and-seabirds(123ac41b-3eb3-4aa4-8551-d91ac236a60c).html https://doi.org/10.1139/z96-187 http://www.scopus.com/inward/record.url?scp=0029664170&partnerID=8YFLogxK |
id |
ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/123ac41b-3eb3-4aa4-8551-d91ac236a60c |
---|---|
record_format |
openpolar |
spelling |
ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/123ac41b-3eb3-4aa4-8551-d91ac236a60c 2024-09-09T19:09:01+00:00 Dive durations in pinnipeds and seabirds Boyd, I. L. Croxall, J. P. 1996 https://research-portal.st-andrews.ac.uk/en/researchoutput/dive-durations-in-pinnipeds-and-seabirds(123ac41b-3eb3-4aa4-8551-d91ac236a60c).html https://doi.org/10.1139/z96-187 http://www.scopus.com/inward/record.url?scp=0029664170&partnerID=8YFLogxK eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/dive-durations-in-pinnipeds-and-seabirds(123ac41b-3eb3-4aa4-8551-d91ac236a60c).html info:eu-repo/semantics/restrictedAccess Boyd , I L & Croxall , J P 1996 , ' Dive durations in pinnipeds and seabirds ' , Canadian Journal of Zoology , vol. 74 , no. 9 , pp. 1696-1705 . https://doi.org/10.1139/z96-187 article 1996 ftunstandrewcris https://doi.org/10.1139/z96-187 2024-06-19T23:59:57Z Many endothermic divers regularly exceed the theoretical limit to the duration of aerobic dives, suggesting that assumptions about either the oxygen storage capacity of tissues or the metabolic rate of divers are wrong. This study examined the frequency distributions of dive durations in five species of endothermic divers from the island of South Georgia, South Atlantic. The theoretical aerobic dive time (TADT), calculated from average field metabolic rates, was exceeded regularly by all species except the Antarctic fur seal (<6% of dives). In contrast, the gentoo penguin exceeded its TADT in 69% of dives and the elephant seal in 91%. The frequency distributions of dive durations were bimodal, most especially in the penguins, with one mode below the TADT and another above the TADT, suggesting two different physiological strategics for diving. Interspecific allometric comparisons of dive durations in endothermic divers showed that, in general, relative dive durations in seabirds were greater than in pinnipeds. Dive durations in pinnipeds scaled approximately to field metabolic rate, whereas in seabirds they scaled most closely to flipper surface area, suggesting that they may be partly limited by the rate and degree of conduction of heat to the water. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Elephant Seal Gentoo penguin University of St Andrews: Research Portal Antarctic The Antarctic Canadian Journal of Zoology 74 9 1696 1705 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
description |
Many endothermic divers regularly exceed the theoretical limit to the duration of aerobic dives, suggesting that assumptions about either the oxygen storage capacity of tissues or the metabolic rate of divers are wrong. This study examined the frequency distributions of dive durations in five species of endothermic divers from the island of South Georgia, South Atlantic. The theoretical aerobic dive time (TADT), calculated from average field metabolic rates, was exceeded regularly by all species except the Antarctic fur seal (<6% of dives). In contrast, the gentoo penguin exceeded its TADT in 69% of dives and the elephant seal in 91%. The frequency distributions of dive durations were bimodal, most especially in the penguins, with one mode below the TADT and another above the TADT, suggesting two different physiological strategics for diving. Interspecific allometric comparisons of dive durations in endothermic divers showed that, in general, relative dive durations in seabirds were greater than in pinnipeds. Dive durations in pinnipeds scaled approximately to field metabolic rate, whereas in seabirds they scaled most closely to flipper surface area, suggesting that they may be partly limited by the rate and degree of conduction of heat to the water. |
format |
Article in Journal/Newspaper |
author |
Boyd, I. L. Croxall, J. P. |
spellingShingle |
Boyd, I. L. Croxall, J. P. Dive durations in pinnipeds and seabirds |
author_facet |
Boyd, I. L. Croxall, J. P. |
author_sort |
Boyd, I. L. |
title |
Dive durations in pinnipeds and seabirds |
title_short |
Dive durations in pinnipeds and seabirds |
title_full |
Dive durations in pinnipeds and seabirds |
title_fullStr |
Dive durations in pinnipeds and seabirds |
title_full_unstemmed |
Dive durations in pinnipeds and seabirds |
title_sort |
dive durations in pinnipeds and seabirds |
publishDate |
1996 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/dive-durations-in-pinnipeds-and-seabirds(123ac41b-3eb3-4aa4-8551-d91ac236a60c).html https://doi.org/10.1139/z96-187 http://www.scopus.com/inward/record.url?scp=0029664170&partnerID=8YFLogxK |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Elephant Seal Gentoo penguin |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Elephant Seal Gentoo penguin |
op_source |
Boyd , I L & Croxall , J P 1996 , ' Dive durations in pinnipeds and seabirds ' , Canadian Journal of Zoology , vol. 74 , no. 9 , pp. 1696-1705 . https://doi.org/10.1139/z96-187 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/dive-durations-in-pinnipeds-and-seabirds(123ac41b-3eb3-4aa4-8551-d91ac236a60c).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1139/z96-187 |
container_title |
Canadian Journal of Zoology |
container_volume |
74 |
container_issue |
9 |
container_start_page |
1696 |
op_container_end_page |
1705 |
_version_ |
1809823302914408448 |