Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus )
Seasonal changes in daily energy expenditure (DEE) and its key underlying components (costs of resting metabolic rate (RMR), thermoregulation, activity, and growth) were measured to determine seasonal energy requirements, bioenergetic priorities, and potential times of year when unpredicted episodes...
Published in: | Canadian Journal of Zoology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2015
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/cjz-2014-0313 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0313 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0313 |
id |
crcansciencepubl:10.1139/cjz-2014-0313 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/cjz-2014-0313 2024-04-28T08:41:31+00:00 Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus ) Dalton, A.J.M. Rosen, D.A.S. Trites, A.W. 2015 http://dx.doi.org/10.1139/cjz-2014-0313 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0313 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0313 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 93, issue 8, page 635-644 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2015 crcansciencepubl https://doi.org/10.1139/cjz-2014-0313 2024-04-09T06:56:25Z Seasonal changes in daily energy expenditure (DEE) and its key underlying components (costs of resting metabolic rate (RMR), thermoregulation, activity, and growth) were measured to determine seasonal energy requirements, bioenergetic priorities, and potential times of year when unpredicted episodes of nutritional stress would have their greatest effect on female northern fur seals (Callorhinus ursinus (L., 1758)). The mean (±SD) DEE of six captive juvenile female fur seals was 527.8 ± 65.7 kJ·kg −1 ·d −1 and fluctuated seasonally (lower during summer and winter, and up to 20% greater in spring and fall). RMR also changed significantly with season and was higher in the fall (potentially due to moulting or anticipated migratory activity). However, changes in RMR did not follow the same seasonal trend as those of DEE. The largest component of DEE was RMR (∼80%, on average), followed by the cost of activity (which may have driven some of the seasonal variations in DEE). In contrast, the energetic costs associated with growth and thermoregulation appeared negligible within the scope of overall energy expenditures. Elevated innate costs of RMR and higher growth rates in the fall and summer, respectively, suggest that inadequate nutrition could comparatively have greater negative effects on female fur seals during these seasons. Article in Journal/Newspaper Callorhinus ursinus Northern fur seal Canadian Science Publishing Canadian Journal of Zoology 93 8 635 644 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Dalton, A.J.M. Rosen, D.A.S. Trites, A.W. Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus ) |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Seasonal changes in daily energy expenditure (DEE) and its key underlying components (costs of resting metabolic rate (RMR), thermoregulation, activity, and growth) were measured to determine seasonal energy requirements, bioenergetic priorities, and potential times of year when unpredicted episodes of nutritional stress would have their greatest effect on female northern fur seals (Callorhinus ursinus (L., 1758)). The mean (±SD) DEE of six captive juvenile female fur seals was 527.8 ± 65.7 kJ·kg −1 ·d −1 and fluctuated seasonally (lower during summer and winter, and up to 20% greater in spring and fall). RMR also changed significantly with season and was higher in the fall (potentially due to moulting or anticipated migratory activity). However, changes in RMR did not follow the same seasonal trend as those of DEE. The largest component of DEE was RMR (∼80%, on average), followed by the cost of activity (which may have driven some of the seasonal variations in DEE). In contrast, the energetic costs associated with growth and thermoregulation appeared negligible within the scope of overall energy expenditures. Elevated innate costs of RMR and higher growth rates in the fall and summer, respectively, suggest that inadequate nutrition could comparatively have greater negative effects on female fur seals during these seasons. |
format |
Article in Journal/Newspaper |
author |
Dalton, A.J.M. Rosen, D.A.S. Trites, A.W. |
author_facet |
Dalton, A.J.M. Rosen, D.A.S. Trites, A.W. |
author_sort |
Dalton, A.J.M. |
title |
Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus ) |
title_short |
Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus ) |
title_full |
Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus ) |
title_fullStr |
Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus ) |
title_full_unstemmed |
Resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( Callorhinus ursinus ) |
title_sort |
resting metabolic rate and activity: key components of seasonal variation in daily energy expenditure for the northern fur seal ( callorhinus ursinus ) |
publisher |
Canadian Science Publishing |
publishDate |
2015 |
url |
http://dx.doi.org/10.1139/cjz-2014-0313 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2014-0313 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2014-0313 |
genre |
Callorhinus ursinus Northern fur seal |
genre_facet |
Callorhinus ursinus Northern fur seal |
op_source |
Canadian Journal of Zoology volume 93, issue 8, page 635-644 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjz-2014-0313 |
container_title |
Canadian Journal of Zoology |
container_volume |
93 |
container_issue |
8 |
container_start_page |
635 |
op_container_end_page |
644 |
_version_ |
1797571791060729856 |