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 (4907S, 7045E), 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 th...
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ftunivtasecite:oai:ecite.utas.edu.au:22362 2023-05-15T13:59:07+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, C Dubroca, L Lea, MA Goldsworthy, S Cherel, Y Duhamel, G Bonadonna, F Donnay, JP 2001 application/pdf http://www.int-res.com/abstracts/meps/v219/p251-264/ https://doi.org/10.3354/meps219251 http://ecite.utas.edu.au/22362 en eng Inter-Research http://ecite.utas.edu.au/22362/1/Guinet_MEPS_2001.pdf http://dx.doi.org/10.3354/meps219251 Guinet, C and Dubroca, L and Lea, MA and Goldsworthy, S and Cherel, Y and Duhamel, G and Bonadonna, F and 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, Marine Ecology Progress Series, 219 pp. 251-264. ISSN 0171-8630 (2001) [Refereed Article] http://ecite.utas.edu.au/22362 Environmental Sciences Environmental Science and Management Wildlife and Habitat Management Refereed Article PeerReviewed 2001 ftunivtasecite https://doi.org/10.3354/meps219251 2019-12-13T21:04:19Z The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (4907S, 7045E), 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 m 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 Seals Arctocephalus gazella eCite UTAS (University of Tasmania) 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 |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management |
spellingShingle |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management Guinet, C Dubroca, L Lea, MA Goldsworthy, S Cherel, Y Duhamel, G 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 |
Environmental Sciences Environmental Science and Management Wildlife and Habitat Management |
description |
The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (4907S, 7045E), 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 m 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, C Dubroca, L Lea, MA Goldsworthy, S Cherel, Y Duhamel, G Bonadonna, F Donnay, JP |
author_facet |
Guinet, C Dubroca, L Lea, MA Goldsworthy, S Cherel, Y Duhamel, G Bonadonna, F Donnay, JP |
author_sort |
Guinet, C |
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 |
http://www.int-res.com/abstracts/meps/v219/p251-264/ https://doi.org/10.3354/meps219251 http://ecite.utas.edu.au/22362 |
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 Seals Arctocephalus gazella |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella |
op_relation |
http://ecite.utas.edu.au/22362/1/Guinet_MEPS_2001.pdf http://dx.doi.org/10.3354/meps219251 Guinet, C and Dubroca, L and Lea, MA and Goldsworthy, S and Cherel, Y and Duhamel, G and Bonadonna, F and 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, Marine Ecology Progress Series, 219 pp. 251-264. ISSN 0171-8630 (2001) [Refereed Article] http://ecite.utas.edu.au/22362 |
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_ |
1766267514299351040 |