Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands
Marine top-predators such as marine mammals forage in a heterogeneous environment according to their energetic requirements and to the variation in environmental characteristics. In this study, the behaviour of breeding females in 2 sympatric fur seal species, Antarctic fur seal Arctocephalus gazell...
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ftdeakinunifig:oai:figshare.com:article/20559414 2023-05-15T14:05:21+02:00 Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands F Bailleul S Luque L Dubroca John Arnould C Guinet 2005-06-02T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30008867 https://figshare.com/articles/journal_contribution/Differences_in_foraging_strategy_and_maternal_behaviour_between_two_sympatric_fur_seal_species_at_the_Crozet_Islands/20559414 unknown http://hdl.handle.net/10536/DRO/DU:30008867 https://figshare.com/articles/journal_contribution/Differences_in_foraging_strategy_and_maternal_behaviour_between_two_sympatric_fur_seal_species_at_the_Crozet_Islands/20559414 All Rights Reserved Oceanography Ecology Zoology activity budget spatial distribution environmental features otariidea Arctocephalus gazella Arctocephalus tropicalis Science & Technology Life Sciences & Biomedicine Physical Sciences Marine & Freshwater Biology Environmental Sciences & Ecology TRACKED KING PENGUINS ARCTOCEPHALUS-GAZELLA SURFACE TEMPERATURES DIVING ACTIVITY TROPICALIS ENERGETICS VARIABILITY POPULATION DYNAMICS Text Journal contribution 2005 ftdeakinunifig 2022-11-17T23:08:50Z Marine top-predators such as marine mammals forage in a heterogeneous environment according to their energetic requirements and to the variation in environmental characteristics. In this study, the behaviour of breeding females in 2 sympatric fur seal species, Antarctic fur seal Arctocephalus gazella and Subantarctic fur seal A. tropicalis , was investigated in relation to foraging effort. Foraging effort was hypothesised to be greater in Antarctic fur seal than in Subantarctic fur seal due to their shorter lactation period. Using satellite telemetry, time-depth recorders and satellite images of sea-surface temperature and chlorophyll a concentration, the foraging grounds, the at-sea activity budgets and the environmental features were determined for both species breeding on the Crozet Archipelago. Foraging cycle duration was similar for the 2 species, and the seals exhibited similar at-sea activity budgets. Only the proportion of time spent at sea was higher in Antarctic fur seals. Separate foraging areas were identified for the 2 species. Antarctic fur seal distribution was related to bathymetric features, while we did not find any direct relationship between chlorophyll a concentration and seal foraging areas. Our results suggest that Antarctic fur seals tend to respond to the higher needs of their pups by having a higher foraging efficiency and concentrating their foraging activity in the most productive areas. Other Non-Article Part of Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Crozet Islands King Penguins DRO - Deakin Research Online Antarctic |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Oceanography Ecology Zoology activity budget spatial distribution environmental features otariidea Arctocephalus gazella Arctocephalus tropicalis Science & Technology Life Sciences & Biomedicine Physical Sciences Marine & Freshwater Biology Environmental Sciences & Ecology TRACKED KING PENGUINS ARCTOCEPHALUS-GAZELLA SURFACE TEMPERATURES DIVING ACTIVITY TROPICALIS ENERGETICS VARIABILITY POPULATION DYNAMICS |
spellingShingle |
Oceanography Ecology Zoology activity budget spatial distribution environmental features otariidea Arctocephalus gazella Arctocephalus tropicalis Science & Technology Life Sciences & Biomedicine Physical Sciences Marine & Freshwater Biology Environmental Sciences & Ecology TRACKED KING PENGUINS ARCTOCEPHALUS-GAZELLA SURFACE TEMPERATURES DIVING ACTIVITY TROPICALIS ENERGETICS VARIABILITY POPULATION DYNAMICS F Bailleul S Luque L Dubroca John Arnould C Guinet Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands |
topic_facet |
Oceanography Ecology Zoology activity budget spatial distribution environmental features otariidea Arctocephalus gazella Arctocephalus tropicalis Science & Technology Life Sciences & Biomedicine Physical Sciences Marine & Freshwater Biology Environmental Sciences & Ecology TRACKED KING PENGUINS ARCTOCEPHALUS-GAZELLA SURFACE TEMPERATURES DIVING ACTIVITY TROPICALIS ENERGETICS VARIABILITY POPULATION DYNAMICS |
description |
Marine top-predators such as marine mammals forage in a heterogeneous environment according to their energetic requirements and to the variation in environmental characteristics. In this study, the behaviour of breeding females in 2 sympatric fur seal species, Antarctic fur seal Arctocephalus gazella and Subantarctic fur seal A. tropicalis , was investigated in relation to foraging effort. Foraging effort was hypothesised to be greater in Antarctic fur seal than in Subantarctic fur seal due to their shorter lactation period. Using satellite telemetry, time-depth recorders and satellite images of sea-surface temperature and chlorophyll a concentration, the foraging grounds, the at-sea activity budgets and the environmental features were determined for both species breeding on the Crozet Archipelago. Foraging cycle duration was similar for the 2 species, and the seals exhibited similar at-sea activity budgets. Only the proportion of time spent at sea was higher in Antarctic fur seals. Separate foraging areas were identified for the 2 species. Antarctic fur seal distribution was related to bathymetric features, while we did not find any direct relationship between chlorophyll a concentration and seal foraging areas. Our results suggest that Antarctic fur seals tend to respond to the higher needs of their pups by having a higher foraging efficiency and concentrating their foraging activity in the most productive areas. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
F Bailleul S Luque L Dubroca John Arnould C Guinet |
author_facet |
F Bailleul S Luque L Dubroca John Arnould C Guinet |
author_sort |
F Bailleul |
title |
Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands |
title_short |
Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands |
title_full |
Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands |
title_fullStr |
Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands |
title_full_unstemmed |
Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands |
title_sort |
differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the crozet islands |
publishDate |
2005 |
url |
http://hdl.handle.net/10536/DRO/DU:30008867 https://figshare.com/articles/journal_contribution/Differences_in_foraging_strategy_and_maternal_behaviour_between_two_sympatric_fur_seal_species_at_the_Crozet_Islands/20559414 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Crozet Islands King Penguins |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Crozet Islands King Penguins |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30008867 https://figshare.com/articles/journal_contribution/Differences_in_foraging_strategy_and_maternal_behaviour_between_two_sympatric_fur_seal_species_at_the_Crozet_Islands/20559414 |
op_rights |
All Rights Reserved |
_version_ |
1766277180405317632 |