The relationship between foraging behaviour and energy expenditure in Antarctic fur seals
By using time-depth recorders to measure diving activity and the doubly-labelled water method to determine energy expenditure, the relationship between foraging behaviour and energy expenditure was investigated in nine Antarctic fur seal females rearing pups. At-sea metabolic rate (MR) (mean of 634±...
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ftdeakinunifig:oai:figshare.com:article/20845867 2024-06-23T07:47:26+00:00 The relationship between foraging behaviour and energy expenditure in Antarctic fur seals John Arnould IL Boyd JR Speakman 1996-08-01T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30100677 https://figshare.com/articles/journal_contribution/The_relationship_between_foraging_behaviour_and_energy_expenditure_in_Antarctic_fur_seals/20845867 unknown http://hdl.handle.net/10536/DRO/DU:30100677 https://figshare.com/articles/journal_contribution/The_relationship_between_foraging_behaviour_and_energy_expenditure_in_Antarctic_fur_seals/20845867 All Rights Reserved Uncategorised value Text Journal contribution 1996 ftdeakinunifig 2024-06-06T02:05:01Z By using time-depth recorders to measure diving activity and the doubly-labelled water method to determine energy expenditure, the relationship between foraging behaviour and energy expenditure was investigated in nine Antarctic fur seal females rearing pups. At-sea metabolic rate (MR) (mean of 634±04 W · kg -1 4.6 times predicted BMR) was positively correlated to foraging trip duration (mean of 4.21 ± 0.54 days: r 2 - 0 5. P < 0.04). There were no relationships between MR and the total number of dives, the total time spent diving or the total vertical distance travelled during the foraging trip. There was, however, a close negative sigmoidal relationship (r 2 = 0.93) between at-sea MR and the proportion of time at sea spent diving. This measure of diving behaviour may provide a useful, inexpensive means of estimating foraging energy expenditure in this species and possibly in other otariids. The rate of diving (m · h -1 ) was also negatively related to at-sea MR (r 2 = 0.69, P < 0.005). Body mass gain during a foraging trip had a positive relationship to the time spent at sea (r 2 = 0.58, P < 0.02) and the total amount of energy expended while at sea (r 2 = 0.72, P < 0.004) such that, while females undertaking long trips have higher metabolic rates, the energetic efficiency with which females gain mass is independent of the time spent at sea. Therefore, within the range of conditions observed, there is no apparent energetic advantage for females in undertaking foraging trips of any particular duration. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals DRO - Deakin Research Online Antarctic |
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DRO - Deakin Research Online |
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Uncategorised value John Arnould IL Boyd JR Speakman The relationship between foraging behaviour and energy expenditure in Antarctic fur seals |
topic_facet |
Uncategorised value |
description |
By using time-depth recorders to measure diving activity and the doubly-labelled water method to determine energy expenditure, the relationship between foraging behaviour and energy expenditure was investigated in nine Antarctic fur seal females rearing pups. At-sea metabolic rate (MR) (mean of 634±04 W · kg -1 4.6 times predicted BMR) was positively correlated to foraging trip duration (mean of 4.21 ± 0.54 days: r 2 - 0 5. P < 0.04). There were no relationships between MR and the total number of dives, the total time spent diving or the total vertical distance travelled during the foraging trip. There was, however, a close negative sigmoidal relationship (r 2 = 0.93) between at-sea MR and the proportion of time at sea spent diving. This measure of diving behaviour may provide a useful, inexpensive means of estimating foraging energy expenditure in this species and possibly in other otariids. The rate of diving (m · h -1 ) was also negatively related to at-sea MR (r 2 = 0.69, P < 0.005). Body mass gain during a foraging trip had a positive relationship to the time spent at sea (r 2 = 0.58, P < 0.02) and the total amount of energy expended while at sea (r 2 = 0.72, P < 0.004) such that, while females undertaking long trips have higher metabolic rates, the energetic efficiency with which females gain mass is independent of the time spent at sea. Therefore, within the range of conditions observed, there is no apparent energetic advantage for females in undertaking foraging trips of any particular duration. |
format |
Article in Journal/Newspaper |
author |
John Arnould IL Boyd JR Speakman |
author_facet |
John Arnould IL Boyd JR Speakman |
author_sort |
John Arnould |
title |
The relationship between foraging behaviour and energy expenditure in Antarctic fur seals |
title_short |
The relationship between foraging behaviour and energy expenditure in Antarctic fur seals |
title_full |
The relationship between foraging behaviour and energy expenditure in Antarctic fur seals |
title_fullStr |
The relationship between foraging behaviour and energy expenditure in Antarctic fur seals |
title_full_unstemmed |
The relationship between foraging behaviour and energy expenditure in Antarctic fur seals |
title_sort |
relationship between foraging behaviour and energy expenditure in antarctic fur seals |
publishDate |
1996 |
url |
http://hdl.handle.net/10536/DRO/DU:30100677 https://figshare.com/articles/journal_contribution/The_relationship_between_foraging_behaviour_and_energy_expenditure_in_Antarctic_fur_seals/20845867 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30100677 https://figshare.com/articles/journal_contribution/The_relationship_between_foraging_behaviour_and_energy_expenditure_in_Antarctic_fur_seals/20845867 |
op_rights |
All Rights Reserved |
_version_ |
1802651527874084864 |