Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean
Abstract 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 th...
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Oxford University Press (OUP)
2003
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Online Access: | http://dx.doi.org/10.1016/s1054-3139(03)00101-2 http://academic.oup.com/icesjms/article-pdf/60/5/990/29120192/60-5-990.pdf |
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croxfordunivpr:10.1016/s1054-3139(03)00101-2 2024-04-07T07:47:54+00:00 Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean Lea, Mary-Anne Dubroca, Laurent 2003 http://dx.doi.org/10.1016/s1054-3139(03)00101-2 http://academic.oup.com/icesjms/article-pdf/60/5/990/29120192/60-5-990.pdf en eng Oxford University Press (OUP) ICES Journal of Marine Science volume 60, issue 5, page 990-1002 ISSN 1095-9289 1054-3139 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2003 croxfordunivpr https://doi.org/10.1016/s1054-3139(03)00101-2 2024-03-08T03:00:03Z Abstract 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 (5.4°C) 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 (3.7°C) 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 Seals Arctocephalus gazella Oxford University Press Antarctic Kerguelen Indian ICES Journal of Marine Science 60 5 990 1002 |
institution |
Open Polar |
collection |
Oxford University Press |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography Lea, Mary-Anne Dubroca, Laurent Fine-scale linkages between the diving behaviour of Antarctic fur seals and oceanographic features in the southern Indian Ocean |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract 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 (5.4°C) 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 (3.7°C) 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, Mary-Anne Dubroca, Laurent |
author_facet |
Lea, Mary-Anne Dubroca, Laurent |
author_sort |
Lea, Mary-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 |
Oxford University Press (OUP) |
publishDate |
2003 |
url |
http://dx.doi.org/10.1016/s1054-3139(03)00101-2 http://academic.oup.com/icesjms/article-pdf/60/5/990/29120192/60-5-990.pdf |
geographic |
Antarctic Kerguelen Indian |
geographic_facet |
Antarctic Kerguelen Indian |
genre |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella |
op_source |
ICES Journal of Marine Science volume 60, issue 5, page 990-1002 ISSN 1095-9289 1054-3139 |
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_ |
1795675096504860672 |