Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands
10 pages International audience 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, Antarct...
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Online Access: | https://hal.science/hal-00187298 https://doi.org/10.3354/meps293273 |
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ftunivnantes:oai:HAL:hal-00187298v1 2023-05-15T13:37:48+02:00 Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands Bailleul, Frédéric Luque, Sebastian P. Dubroca, Laurent Arnoult, John P.Y. Guinet, Christophe Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Department of Biology Memorial University School of Biological and Chemical Sciences Deakin University Burwood 2005 https://hal.science/hal-00187298 https://doi.org/10.3354/meps293273 en eng HAL CCSD Inter Research info:eu-repo/semantics/altIdentifier/doi/10.3354/meps293273 hal-00187298 https://hal.science/hal-00187298 doi:10.3354/meps293273 ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00187298 Marine Ecology Progress Series, 2005, 293, pp.273-282. ⟨10.3354/meps293273⟩ Activity budget Spatial distribution Environmental features Otariidea Arctocephalus gazella Arctocephalus tropicalis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2005 ftunivnantes https://doi.org/10.3354/meps293273 2023-02-08T08:23:10Z 10 pages International audience 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Crozet Islands Université de Nantes: HAL-UNIV-NANTES Antarctic Marine Ecology Progress Series 293 273 282 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Activity budget Spatial distribution Environmental features Otariidea Arctocephalus gazella Arctocephalus tropicalis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Activity budget Spatial distribution Environmental features Otariidea Arctocephalus gazella Arctocephalus tropicalis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes Bailleul, Frédéric Luque, Sebastian P. Dubroca, Laurent Arnoult, John P.Y. Guinet, Christophe Differences in foraging strategy and maternal behaviour between two sympatric fur seal species at the Crozet Islands |
topic_facet |
Activity budget Spatial distribution Environmental features Otariidea Arctocephalus gazella Arctocephalus tropicalis [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDE.ES]Environmental Sciences/Environmental and Society [SDE.MCG]Environmental Sciences/Global Changes |
description |
10 pages International audience 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. |
author2 |
Centre d'Études Biologiques de Chizé (CEBC) Centre National de la Recherche Scientifique (CNRS) Department of Biology Memorial University School of Biological and Chemical Sciences Deakin University Burwood |
format |
Article in Journal/Newspaper |
author |
Bailleul, Frédéric Luque, Sebastian P. Dubroca, Laurent Arnoult, John P.Y. Guinet, Christophe |
author_facet |
Bailleul, Frédéric Luque, Sebastian P. Dubroca, Laurent Arnoult, John P.Y. Guinet, Christophe |
author_sort |
Bailleul, Frédéric |
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 |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00187298 https://doi.org/10.3354/meps293273 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Crozet Islands |
genre_facet |
Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Crozet Islands |
op_source |
ISSN: 0171-8630 EISSN: 1616-1599 Marine Ecology Progress Series https://hal.science/hal-00187298 Marine Ecology Progress Series, 2005, 293, pp.273-282. ⟨10.3354/meps293273⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.3354/meps293273 hal-00187298 https://hal.science/hal-00187298 doi:10.3354/meps293273 |
op_doi |
https://doi.org/10.3354/meps293273 |
container_title |
Marine Ecology Progress Series |
container_volume |
293 |
container_start_page |
273 |
op_container_end_page |
282 |
_version_ |
1766097867310628864 |