Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems
The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (49 degrees 07 'S, 70 degrees 45 'E), Kerguelen Island in February 1998. Eleven females were fitted with a satellite transmitter and time-depth recorder. The 2 data sets were combined in order...
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ftarchimer:oai:archimer.ifremer.fr:35843 2023-05-15T13:50:50+02:00 Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems Guinet, Christophe Dubroca, L Lea, Ma Goldsworthy, S Cherel, Yan Duhamel, Guy Bonadonna, F Donnay, Jp 2001-09-10 application/pdf https://archimer.ifremer.fr/doc/00247/35843/34354.pdf https://doi.org/10.3354/meps219251 https://archimer.ifremer.fr/doc/00247/35843/ eng eng Inter-research https://archimer.ifremer.fr/doc/00247/35843/34354.pdf doi:10.3354/meps219251 https://archimer.ifremer.fr/doc/00247/35843/ Inter-Research 2001 info:eu-repo/semantics/openAccess restricted use Marine Ecology Progress Series (0171-8630) (Inter-research), 2001-09-10 , Vol. 219 , P. 251-264 Antarctic fur seal diet oceanographic conditions foraging geographic information system text Publication info:eu-repo/semantics/article 2001 ftarchimer https://doi.org/10.3354/meps219251 2021-09-23T20:25:44Z The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (49 degrees 07 'S, 70 degrees 45 'E), Kerguelen Island in February 1998. Eleven females were fitted with a satellite transmitter and time-depth recorder. The 2 data sets were combined in order to locate diving activity of the seals. The occurrence of fish in the diet of the seals was investigated by the identification of otoliths in 55 scats collected at the breeding colony during the study period. Oceanographic variables were measured simultaneously by direct sampling and satellite remote sensing. The mesopelagic fish community was sampled at 20 stations along 4 transects, where epipelagic trawls were conducted at night at 50 ni depth. We then investigated, using geographic information systems, the relationship between the spatial distribution of diving activity of the seals and oceanographic variables (sea surface temperature, surface chlorophyll concentration, prey distribution and bathymetry) at the same spatio-temporal scale. An inverse relationship was found between the main fish species preyed on by the fur seals and those sampled in trawl nets. However, diving activity of the seals was significantly related to oceanographic conditions, forage fish distribution and distance from the colony, although these relationships changed with the spatial scale investigated, A probabilistic model was developed for the distribution of diving activity, which predicted where females,should concentrate their foraging activity according to the oceanographic conditions of the year, and where breeding colonies should be located. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seal Antarctic Fur Seals Arctocephalus gazella Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Cap Noir ENVELOPE(70.452,70.452,-49.069,-49.069) Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) Marine Ecology Progress Series 219 251 264 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
Antarctic fur seal diet oceanographic conditions foraging geographic information system |
spellingShingle |
Antarctic fur seal diet oceanographic conditions foraging geographic information system Guinet, Christophe Dubroca, L Lea, Ma Goldsworthy, S Cherel, Yan Duhamel, Guy Bonadonna, F Donnay, Jp Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems |
topic_facet |
Antarctic fur seal diet oceanographic conditions foraging geographic information system |
description |
The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (49 degrees 07 'S, 70 degrees 45 'E), Kerguelen Island in February 1998. Eleven females were fitted with a satellite transmitter and time-depth recorder. The 2 data sets were combined in order to locate diving activity of the seals. The occurrence of fish in the diet of the seals was investigated by the identification of otoliths in 55 scats collected at the breeding colony during the study period. Oceanographic variables were measured simultaneously by direct sampling and satellite remote sensing. The mesopelagic fish community was sampled at 20 stations along 4 transects, where epipelagic trawls were conducted at night at 50 ni depth. We then investigated, using geographic information systems, the relationship between the spatial distribution of diving activity of the seals and oceanographic variables (sea surface temperature, surface chlorophyll concentration, prey distribution and bathymetry) at the same spatio-temporal scale. An inverse relationship was found between the main fish species preyed on by the fur seals and those sampled in trawl nets. However, diving activity of the seals was significantly related to oceanographic conditions, forage fish distribution and distance from the colony, although these relationships changed with the spatial scale investigated, A probabilistic model was developed for the distribution of diving activity, which predicted where females,should concentrate their foraging activity according to the oceanographic conditions of the year, and where breeding colonies should be located. |
format |
Article in Journal/Newspaper |
author |
Guinet, Christophe Dubroca, L Lea, Ma Goldsworthy, S Cherel, Yan Duhamel, Guy Bonadonna, F Donnay, Jp |
author_facet |
Guinet, Christophe Dubroca, L Lea, Ma Goldsworthy, S Cherel, Yan Duhamel, Guy Bonadonna, F Donnay, Jp |
author_sort |
Guinet, Christophe |
title |
Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems |
title_short |
Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems |
title_full |
Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems |
title_fullStr |
Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems |
title_full_unstemmed |
Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems |
title_sort |
spatial distribution of foraging in female antarctic fur seals arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems |
publisher |
Inter-research |
publishDate |
2001 |
url |
https://archimer.ifremer.fr/doc/00247/35843/34354.pdf https://doi.org/10.3354/meps219251 https://archimer.ifremer.fr/doc/00247/35843/ |
long_lat |
ENVELOPE(70.452,70.452,-49.069,-49.069) ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Antarctic Cap Noir Kerguelen Kerguelen Island |
geographic_facet |
Antarctic Cap Noir Kerguelen Kerguelen Island |
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 |
Marine Ecology Progress Series (0171-8630) (Inter-research), 2001-09-10 , Vol. 219 , P. 251-264 |
op_relation |
https://archimer.ifremer.fr/doc/00247/35843/34354.pdf doi:10.3354/meps219251 https://archimer.ifremer.fr/doc/00247/35843/ |
op_rights |
Inter-Research 2001 info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3354/meps219251 |
container_title |
Marine Ecology Progress Series |
container_volume |
219 |
container_start_page |
251 |
op_container_end_page |
264 |
_version_ |
1766254135157456896 |