Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean
13 pages International audience Diving activity, foraging locations and pup provisioning behaviour of 10 female Antarctic fur seals (Arctocephalus gazella) were examined with respect to a range of oceanographic parameters (sea surface temperature, chlorophyll distribution and bathymetry) at the Kerg...
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Online Access: | https://hal.science/hal-00189762 https://doi.org/10.1016/S1054-3139(03)00101-2 |
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ftunivnantes:oai:HAL:hal-00189762v1 2023-05-15T13:37:48+02:00 Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean Lea, Marie-Anne Dubroca, Laurent Antartic Wildlife Research Unit School of Zoology, University of Tasmania Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) 2003 https://hal.science/hal-00189762 https://doi.org/10.1016/S1054-3139(03)00101-2 en eng HAL CCSD Oxford University Press (OUP) info:eu-repo/semantics/altIdentifier/doi/10.1016/S1054-3139(03)00101-2 hal-00189762 https://hal.science/hal-00189762 doi:10.1016/S1054-3139(03)00101-2 ISSN: 1054-3139 EISSN: 1095-9289 ICES Journal of Marine Science https://hal.science/hal-00189762 ICES Journal of Marine Science, 2003, 60, pp.1-13. ⟨10.1016/S1054-3139(03)00101-2⟩ Antarctic fur seal diving oceanography Polar Frontal Zone provisioning spatial scale [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society info:eu-repo/semantics/article Journal articles 2003 ftunivnantes https://doi.org/10.1016/S1054-3139(03)00101-2 2023-02-08T08:18:31Z 13 pages International audience Diving activity, foraging locations and pup provisioning behaviour of 10 female Antarctic fur seals (Arctocephalus gazella) were examined with respect to a range of oceanographic parameters (sea surface temperature, chlorophyll distribution and bathymetry) at the Kerguelen Archipelago in the southern Indian Ocean in February 2000. A multivariate analysis of the environmental parameters at each of the nightly foraging locations indicated the existence of two ecoregions within the foraging range of the seals. Five seals actively foraged in oceanic waters (1870 m) with relatively warm surface water (5.4C) to the north and east of the colony (ecoregion 1), while four others travelled to the southeast (ecoregion 2) to waters typical of the surface expression of the Polar Front (3.7C) located over the continental shelf break (597 m). Only one seal foraged in both regions. Diving behaviour, parameterised on a nightly basis using seven variables, clearly differed between regions, with the diving activity in the warmer ecoregion 1 being characterised by deep dives (55 m), and relatively little time spent diving (47%). Conversely, dives within ecoregion 2 were, on average, to shallower depths (34.5 m), and proportionately more time was spent diving (54%). Despite differences in environmental conditions encountered and associated differences in diving activity, the foraging success of mothers, in terms of daily pup mass gain per foraging cycle, was similar in both ecoregions. The study highlights the use of multivariate analysis in categorising the foraging zones and behaviour of Antarctic fur seals. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Université de Nantes: HAL-UNIV-NANTES Antarctic Kerguelen Indian ICES Journal of Marine Science 60 5 990 1002 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Antarctic fur seal diving oceanography Polar Frontal Zone provisioning spatial scale [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society |
spellingShingle |
Antarctic fur seal diving oceanography Polar Frontal Zone provisioning spatial scale [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society Lea, Marie-Anne Dubroca, Laurent Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean |
topic_facet |
Antarctic fur seal diving oceanography Polar Frontal Zone provisioning spatial scale [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society |
description |
13 pages International audience Diving activity, foraging locations and pup provisioning behaviour of 10 female Antarctic fur seals (Arctocephalus gazella) were examined with respect to a range of oceanographic parameters (sea surface temperature, chlorophyll distribution and bathymetry) at the Kerguelen Archipelago in the southern Indian Ocean in February 2000. A multivariate analysis of the environmental parameters at each of the nightly foraging locations indicated the existence of two ecoregions within the foraging range of the seals. Five seals actively foraged in oceanic waters (1870 m) with relatively warm surface water (5.4C) to the north and east of the colony (ecoregion 1), while four others travelled to the southeast (ecoregion 2) to waters typical of the surface expression of the Polar Front (3.7C) located over the continental shelf break (597 m). Only one seal foraged in both regions. Diving behaviour, parameterised on a nightly basis using seven variables, clearly differed between regions, with the diving activity in the warmer ecoregion 1 being characterised by deep dives (55 m), and relatively little time spent diving (47%). Conversely, dives within ecoregion 2 were, on average, to shallower depths (34.5 m), and proportionately more time was spent diving (54%). Despite differences in environmental conditions encountered and associated differences in diving activity, the foraging success of mothers, in terms of daily pup mass gain per foraging cycle, was similar in both ecoregions. The study highlights the use of multivariate analysis in categorising the foraging zones and behaviour of Antarctic fur seals. |
author2 |
Antartic Wildlife Research Unit School of Zoology, University of Tasmania Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Lea, Marie-Anne Dubroca, Laurent |
author_facet |
Lea, Marie-Anne Dubroca, Laurent |
author_sort |
Lea, Marie-Anne |
title |
Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean |
title_short |
Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean |
title_full |
Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean |
title_fullStr |
Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean |
title_full_unstemmed |
Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean |
title_sort |
fine-scale linkages between the diving behaviour of antarctic fur seals and oceanographic features in the southern indian ocean |
publisher |
HAL CCSD |
publishDate |
2003 |
url |
https://hal.science/hal-00189762 https://doi.org/10.1016/S1054-3139(03)00101-2 |
geographic |
Antarctic Kerguelen Indian |
geographic_facet |
Antarctic Kerguelen Indian |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella |
op_source |
ISSN: 1054-3139 EISSN: 1095-9289 ICES Journal of Marine Science https://hal.science/hal-00189762 ICES Journal of Marine Science, 2003, 60, pp.1-13. ⟨10.1016/S1054-3139(03)00101-2⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/S1054-3139(03)00101-2 hal-00189762 https://hal.science/hal-00189762 doi:10.1016/S1054-3139(03)00101-2 |
op_doi |
https://doi.org/10.1016/S1054-3139(03)00101-2 |
container_title |
ICES Journal of Marine Science |
container_volume |
60 |
container_issue |
5 |
container_start_page |
990 |
op_container_end_page |
1002 |
_version_ |
1766097843710328832 |