Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour
The behaviour of southern elephant seals from Kerguelen Island (4950′S, 7030′E) was investigated in relation to the oceanographic regions of the Southern Ocean. The oceanographic and the seal behaviour data, including location and diving activity, were collected using a new generation of satellite-r...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Language: | English |
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Pergamon-Elsevier Science Ltd
2007
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Online Access: | https://eprints.utas.edu.au/4146/ https://eprints.utas.edu.au/4146/1/4146.pdf https://doi.org/10.1016/j.dsr2.2006.11.005 |
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ftunivtasmania:oai:eprints.utas.edu.au:4146 2023-05-15T13:36:46+02:00 Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour Bailleul, F Charrassin, JB Ezraty, R Girard-Ardhuin, F McMahon, CR Field, IC Guinet, C 2007-02 application/pdf https://eprints.utas.edu.au/4146/ https://eprints.utas.edu.au/4146/1/4146.pdf https://doi.org/10.1016/j.dsr2.2006.11.005 en eng Pergamon-Elsevier Science Ltd https://eprints.utas.edu.au/4146/1/4146.pdf Bailleul, F, Charrassin, JB, Ezraty, R, Girard-Ardhuin, F, McMahon, CR, Field, IC and Guinet, C 2007 , 'Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour' , Deep-Sea Research Part II, vol. 54, no. 3-4 , pp. 343-355 , doi:10.1016/j.dsr2.2006.11.005 <http://dx.doi.org/10.1016/j.dsr2.2006.11.005>. 300802 Wildlife and Habitat Management Marine ecology Temperature profiles Benthic environment Pelagic environment Diving Behaviour Mirounga leonina Article PeerReviewed 2007 ftunivtasmania https://doi.org/10.1016/j.dsr2.2006.11.005 2020-05-30T07:18:00Z The behaviour of southern elephant seals from Kerguelen Island (4950′S, 7030′E) was investigated in relation to the oceanographic regions of the Southern Ocean. The oceanographic and the seal behaviour data, including location and diving activity, were collected using a new generation of satellite-relayed devices measuring and transmitting pressure, temperature, and salinity along with locations. Dive duration, maximum diving depth, time spent at the bottom of the dives, and shape of dive profiles were compared between male and female seals, and were related to the oceanographic characteristics of areas prospected by the seals. Most animals travelled to the Antarctic shelf. However, during winter, adult females travelled away from the continent, remained and foraged within the marginal sea-ice zone, while juvenile males remained within the pack ice to forage mainly on the Antarctic shelf. Therefore, as the ice expanded females appeared to shift from benthic to pelagic foraging farther north, while males continued to forage almost exclusively benthically on the continental shelf. This difference is likely related to the different energetic requirements between the two sexes, but also may be related to pregnant females having to return to Kerguelen in early spring in order to give birth and successfully raise their pups, while males can remain in the ice. Our results show an important link between elephant seals and Antarctic sea ice and suggest that changes in sea-ice conditions could strongly affect the behaviour of this species. Article in Journal/Newspaper Antarc* Antarctic Elephant Seals Mirounga leonina Sea ice Southern Elephant Seals Southern Ocean University of Tasmania: UTas ePrints Antarctic Southern Ocean The Antarctic Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) Deep Sea Research Part II: Topical Studies in Oceanography 54 3-4 343 355 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
300802 Wildlife and Habitat Management Marine ecology Temperature profiles Benthic environment Pelagic environment Diving Behaviour Mirounga leonina |
spellingShingle |
300802 Wildlife and Habitat Management Marine ecology Temperature profiles Benthic environment Pelagic environment Diving Behaviour Mirounga leonina Bailleul, F Charrassin, JB Ezraty, R Girard-Ardhuin, F McMahon, CR Field, IC Guinet, C Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour |
topic_facet |
300802 Wildlife and Habitat Management Marine ecology Temperature profiles Benthic environment Pelagic environment Diving Behaviour Mirounga leonina |
description |
The behaviour of southern elephant seals from Kerguelen Island (4950′S, 7030′E) was investigated in relation to the oceanographic regions of the Southern Ocean. The oceanographic and the seal behaviour data, including location and diving activity, were collected using a new generation of satellite-relayed devices measuring and transmitting pressure, temperature, and salinity along with locations. Dive duration, maximum diving depth, time spent at the bottom of the dives, and shape of dive profiles were compared between male and female seals, and were related to the oceanographic characteristics of areas prospected by the seals. Most animals travelled to the Antarctic shelf. However, during winter, adult females travelled away from the continent, remained and foraged within the marginal sea-ice zone, while juvenile males remained within the pack ice to forage mainly on the Antarctic shelf. Therefore, as the ice expanded females appeared to shift from benthic to pelagic foraging farther north, while males continued to forage almost exclusively benthically on the continental shelf. This difference is likely related to the different energetic requirements between the two sexes, but also may be related to pregnant females having to return to Kerguelen in early spring in order to give birth and successfully raise their pups, while males can remain in the ice. Our results show an important link between elephant seals and Antarctic sea ice and suggest that changes in sea-ice conditions could strongly affect the behaviour of this species. |
format |
Article in Journal/Newspaper |
author |
Bailleul, F Charrassin, JB Ezraty, R Girard-Ardhuin, F McMahon, CR Field, IC Guinet, C |
author_facet |
Bailleul, F Charrassin, JB Ezraty, R Girard-Ardhuin, F McMahon, CR Field, IC Guinet, C |
author_sort |
Bailleul, F |
title |
Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour |
title_short |
Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour |
title_full |
Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour |
title_fullStr |
Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour |
title_full_unstemmed |
Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour |
title_sort |
southern elephant seals from kerguelen island confronted by antarctic sea ice. changes in movements and in diving behaviour |
publisher |
Pergamon-Elsevier Science Ltd |
publishDate |
2007 |
url |
https://eprints.utas.edu.au/4146/ https://eprints.utas.edu.au/4146/1/4146.pdf https://doi.org/10.1016/j.dsr2.2006.11.005 |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Antarctic Southern Ocean The Antarctic Kerguelen Kerguelen Island |
geographic_facet |
Antarctic Southern Ocean The Antarctic Kerguelen Kerguelen Island |
genre |
Antarc* Antarctic Elephant Seals Mirounga leonina Sea ice Southern Elephant Seals Southern Ocean |
genre_facet |
Antarc* Antarctic Elephant Seals Mirounga leonina Sea ice Southern Elephant Seals Southern Ocean |
op_relation |
https://eprints.utas.edu.au/4146/1/4146.pdf Bailleul, F, Charrassin, JB, Ezraty, R, Girard-Ardhuin, F, McMahon, CR, Field, IC and Guinet, C 2007 , 'Southern elephant seals from Kerguelen Island confronted by Antarctic Sea ice. Changes in movements and in diving behaviour' , Deep-Sea Research Part II, vol. 54, no. 3-4 , pp. 343-355 , doi:10.1016/j.dsr2.2006.11.005 <http://dx.doi.org/10.1016/j.dsr2.2006.11.005>. |
op_doi |
https://doi.org/10.1016/j.dsr2.2006.11.005 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
54 |
container_issue |
3-4 |
container_start_page |
343 |
op_container_end_page |
355 |
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1766083740736421888 |