Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>)
Abstract Changes in Arctic ice conditions have raised concerns regarding potential impacts on energy expenditure and food requirements of walruses. Modeling the repercussions of environmental changes requires accurate species‐specific measures of bioenergetic expenditures. This is particularly true...
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crwiley:10.1111/mms.12743 2023-12-03T10:18:07+01:00 Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>) Rosen, David A. S. Natural Sciences and Engineering Research Council of Canada 2020 http://dx.doi.org/10.1111/mms.12743 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12743 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12743 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 37, issue 1, page 162-172 ISSN 0824-0469 1748-7692 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2020 crwiley https://doi.org/10.1111/mms.12743 2023-11-09T13:20:11Z Abstract Changes in Arctic ice conditions have raised concerns regarding potential impacts on energy expenditure and food requirements of walruses. Modeling the repercussions of environmental changes requires accurate species‐specific measures of bioenergetic expenditures. This is particularly true for walruses, who have a unique anatomy and foraging ecology from other pinnipeds. This study measured resting metabolic rate (RMR) and subsurface swimming metabolism in two juvenile walruses over a 13‐month period. The walruses had relatively low RMR compared to studies of other young pinnipeds. RMR was greater for the male than the female, as expected given its larger size; the reverse was true on a mass‐specific basis. There was also considerable variability in RMR for each walrus during the year that could not be accounted for by changes in body mass. Metabolism while swimming was about twice RMR, and locomotor costs were higher than generally predicted for other marine mammals. The lower calculated swimming efficiency may reflect the fact that walruses are not “high velocity” pursuit predators. The estimates of metabolic expenditure obtained in this study for young walruses are invaluable for quantifying the energetic consequences of behavioral changes induced by environmental shifts in the wild. Article in Journal/Newspaper Arctic Odobenus rosmarus walrus* Wiley Online Library (via Crossref) Arctic Marine Mammal Science 37 1 162 172 |
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Open Polar |
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Wiley Online Library (via Crossref) |
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crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Rosen, David A. S. Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>) |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract Changes in Arctic ice conditions have raised concerns regarding potential impacts on energy expenditure and food requirements of walruses. Modeling the repercussions of environmental changes requires accurate species‐specific measures of bioenergetic expenditures. This is particularly true for walruses, who have a unique anatomy and foraging ecology from other pinnipeds. This study measured resting metabolic rate (RMR) and subsurface swimming metabolism in two juvenile walruses over a 13‐month period. The walruses had relatively low RMR compared to studies of other young pinnipeds. RMR was greater for the male than the female, as expected given its larger size; the reverse was true on a mass‐specific basis. There was also considerable variability in RMR for each walrus during the year that could not be accounted for by changes in body mass. Metabolism while swimming was about twice RMR, and locomotor costs were higher than generally predicted for other marine mammals. The lower calculated swimming efficiency may reflect the fact that walruses are not “high velocity” pursuit predators. The estimates of metabolic expenditure obtained in this study for young walruses are invaluable for quantifying the energetic consequences of behavioral changes induced by environmental shifts in the wild. |
author2 |
Natural Sciences and Engineering Research Council of Canada |
format |
Article in Journal/Newspaper |
author |
Rosen, David A. S. |
author_facet |
Rosen, David A. S. |
author_sort |
Rosen, David A. S. |
title |
Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>) |
title_short |
Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>) |
title_full |
Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>) |
title_fullStr |
Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>) |
title_full_unstemmed |
Resting and swimming metabolic rates in juvenile walruses (<scp> Odobenus rosmarus </scp>) |
title_sort |
resting and swimming metabolic rates in juvenile walruses (<scp> odobenus rosmarus </scp>) |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1111/mms.12743 https://onlinelibrary.wiley.com/doi/pdf/10.1111/mms.12743 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/mms.12743 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Odobenus rosmarus walrus* |
genre_facet |
Arctic Odobenus rosmarus walrus* |
op_source |
Marine Mammal Science volume 37, issue 1, page 162-172 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/mms.12743 |
container_title |
Marine Mammal Science |
container_volume |
37 |
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1 |
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162 |
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172 |
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1784265093377163264 |