Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions
Southern elephant seals, Mirounga leonina, undertake large-scale oceanic movements to access favourable foraging areas. Successful foraging areas of elephant seals from the Kerguelen Islands are investigated here in relation to oceanographic parameters. Movements and diving activity of the seals as...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1038.1110 2023-05-15T13:34:30+02:00 Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions Frédéric Bailleul Jean-Benoît Charrassin Pascal Monestiez Fabien Roquet Martin Biuw Christophe Guinet The Pennsylvania State University CiteSeerX Archives 2007 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.1110 http://www.cebc.cnrs.fr/publipdf/2007/BPTRS362.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.1110 http://www.cebc.cnrs.fr/publipdf/2007/BPTRS362.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cebc.cnrs.fr/publipdf/2007/BPTRS362.pdf text 2007 ftciteseerx 2020-03-08T01:18:20Z Southern elephant seals, Mirounga leonina, undertake large-scale oceanic movements to access favourable foraging areas. Successful foraging areas of elephant seals from the Kerguelen Islands are investigated here in relation to oceanographic parameters. Movements and diving activity of the seals as well as oceanographic data were collected through a new generation of satellite relayed devices measuring and transmitting locations, pressure, temperature and salinity. For the first time, we have associated foraging behaviour, determined by high increased sinuosity in tracks, and dive density (i.e. number of dives performed per kilometre covered), and changes in body condition, determined by variations in drift rate obtained from drift dives, to identify the oceanographic conditions of successful foraging zones for this species. Two main sectors, one close to the Antarctic continent and the other along the Polar Front (PF), where both foraging activity and body condition increase, seem to be of particular interest for the seals. Within these regions, some seals tended to focus their foraging activity on zones with particular temperature signatures. Along the Antarctic continent, some seals targeted colder waters on the sea bottom during benthic dives, while at the PF the favourable zones tended to be warmer. The possible negative effect of colder waters in Antarctic on the swimming performances of potential fish or squid prey could explain the behaviour of elephant seals in these zones, while warmer waters within the PF could correspond to the optimal conditions for potential myctophid prey of elephant seals. Text Antarc* Antarctic Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seals Unknown Antarctic Kerguelen Kerguelen Islands The Antarctic |
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Open Polar |
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ftciteseerx |
language |
English |
description |
Southern elephant seals, Mirounga leonina, undertake large-scale oceanic movements to access favourable foraging areas. Successful foraging areas of elephant seals from the Kerguelen Islands are investigated here in relation to oceanographic parameters. Movements and diving activity of the seals as well as oceanographic data were collected through a new generation of satellite relayed devices measuring and transmitting locations, pressure, temperature and salinity. For the first time, we have associated foraging behaviour, determined by high increased sinuosity in tracks, and dive density (i.e. number of dives performed per kilometre covered), and changes in body condition, determined by variations in drift rate obtained from drift dives, to identify the oceanographic conditions of successful foraging zones for this species. Two main sectors, one close to the Antarctic continent and the other along the Polar Front (PF), where both foraging activity and body condition increase, seem to be of particular interest for the seals. Within these regions, some seals tended to focus their foraging activity on zones with particular temperature signatures. Along the Antarctic continent, some seals targeted colder waters on the sea bottom during benthic dives, while at the PF the favourable zones tended to be warmer. The possible negative effect of colder waters in Antarctic on the swimming performances of potential fish or squid prey could explain the behaviour of elephant seals in these zones, while warmer waters within the PF could correspond to the optimal conditions for potential myctophid prey of elephant seals. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Frédéric Bailleul Jean-Benoît Charrassin Pascal Monestiez Fabien Roquet Martin Biuw Christophe Guinet |
spellingShingle |
Frédéric Bailleul Jean-Benoît Charrassin Pascal Monestiez Fabien Roquet Martin Biuw Christophe Guinet Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions |
author_facet |
Frédéric Bailleul Jean-Benoît Charrassin Pascal Monestiez Fabien Roquet Martin Biuw Christophe Guinet |
author_sort |
Frédéric Bailleul |
title |
Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions |
title_short |
Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions |
title_full |
Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions |
title_fullStr |
Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions |
title_full_unstemmed |
Successful foraging zones of southern elephant seals from the Kerguelen Islands in relation to oceanographic conditions |
title_sort |
successful foraging zones of southern elephant seals from the kerguelen islands in relation to oceanographic conditions |
publishDate |
2007 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.1110 http://www.cebc.cnrs.fr/publipdf/2007/BPTRS362.pdf |
geographic |
Antarctic Kerguelen Kerguelen Islands The Antarctic |
geographic_facet |
Antarctic Kerguelen Kerguelen Islands The Antarctic |
genre |
Antarc* Antarctic Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seals |
genre_facet |
Antarc* Antarctic Elephant Seals Kerguelen Islands Mirounga leonina Southern Elephant Seals |
op_source |
http://www.cebc.cnrs.fr/publipdf/2007/BPTRS362.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.1110 http://www.cebc.cnrs.fr/publipdf/2007/BPTRS362.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766053754207993856 |