Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean
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 souther...
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Online Access: | https://eprints.utas.edu.au/9808/ https://eprints.utas.edu.au/9808/1/ICES_Lea_Dubroca_2003.pdf https://doi.org/10.1016/S1054-3139(03)00101-2 |
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ftunivtasmania:oai:eprints.utas.edu.au:9808 2023-05-15T13:36:47+02:00 Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean Lea, M-A Dubroca, L 2003 application/pdf https://eprints.utas.edu.au/9808/ https://eprints.utas.edu.au/9808/1/ICES_Lea_Dubroca_2003.pdf https://doi.org/10.1016/S1054-3139(03)00101-2 en eng https://eprints.utas.edu.au/9808/1/ICES_Lea_Dubroca_2003.pdf Lea, M-A and Dubroca, L 2003 , 'Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean' , ICES Journal of Marine Science, vol. 60, no. 5 , pp. 990-1002 , doi:10.1016/S1054-3139(03)00101-2 <http://dx.doi.org/10.1016/S1054-3139(03)00101-2>. cc_utas Antarctic fur seal diving oceanography Polar Frontal Zone provisioning spatial scale Article PeerReviewed 2003 ftunivtasmania https://doi.org/10.1016/S1054-3139(03)00101-2 2020-05-30T07:23:30Z 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 University of Tasmania: UTas ePrints Antarctic Kerguelen Indian ICES Journal of Marine Science 60 5 990 1002 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Antarctic fur seal diving oceanography Polar Frontal Zone provisioning spatial scale |
spellingShingle |
Antarctic fur seal diving oceanography Polar Frontal Zone provisioning spatial scale Lea, M-A Dubroca, L 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 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Lea, M-A Dubroca, L |
author_facet |
Lea, M-A Dubroca, L |
author_sort |
Lea, M-A |
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 |
publishDate |
2003 |
url |
https://eprints.utas.edu.au/9808/ https://eprints.utas.edu.au/9808/1/ICES_Lea_Dubroca_2003.pdf 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_relation |
https://eprints.utas.edu.au/9808/1/ICES_Lea_Dubroca_2003.pdf Lea, M-A and Dubroca, L 2003 , 'Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean' , ICES Journal of Marine Science, vol. 60, no. 5 , pp. 990-1002 , doi:10.1016/S1054-3139(03)00101-2 <http://dx.doi.org/10.1016/S1054-3139(03)00101-2>. |
op_rights |
cc_utas |
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_ |
1766083912067448832 |