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- W2099731950 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 219:251-264 (2001) - doi:10.3354/meps219251 Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems Christophe Guinet1,*, Laurent Dubroca1, Mary Anne Lea2, Simon Goldsworthy2, Yves Cherel1, Guy Duhamel3, Francesco Bonadonna1, Jean-Paul Donnay4 1Centre d¹Etudes Biologiques de Chizé, Centre National de la Recherche Scientifique, 79360 Villiers en Bois, France 2Antarctic Wildlife Research Unit, Zoology Department, University of Tasmania, GPO Box 252-05 Hobart, Tasmania 7001, Australia 3Museum National d¹Histoire Naturelle, Laboratoire d¹Ichtyologie Générale et Appliquée, 43 rue Cuvier, 75231 Paris Cedex 05, France 4Departement de Géomatique, Laboratoire SURFACES, Université de Liege, 7 place du 20 Aout (A1), 4000 Liege, Belgium *E-mail: guinet@cebc.cnrs.fr ABSTRACT: The distribution of foraging activity for female Antarctic fur seals was investigated at Cap Noir (49°07¹S, 70°45¹E), 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. KEY WORDS: Antarctic fur seal · Diet · Oceanographic conditions · Foraging · Geographic Information System Full text in pdf format PreviousNextExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 219. Online publication date: September 10, 2001 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2001 Inter-Research." @default.
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- W2099731950 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" @default.
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