FN Archimer Export Format
PT J
TI Spatial distribution of foraging in female Antarctic fur seals Arctocephalus gazella in relation to oceanographic variables: a scale-dependent approach using geographic information systems
BT 
AF GUINET, Christophe
   DUBROCA, L
   LEA, MA
   GOLDSWORTHY, S
   CHEREL, Yan
   DUHAMEL, Guy
   BONADONNA, F
   DONNAY, JP
AS 1:1;2:1;3:2;4:2;5:1;6:3;7:1;8:4;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 CNRS, Ctr Etude Biol Chize, F-79360 Villiers En Bois, France.
   Univ Tasmania, Dept Zool, Antarctic Wildlife Res Unit, Hobart, Tas 7001, Australia.
   Museum Natl Hist Nat, Ichtyol Gen & Appl Lab, F-75231 Paris 05, France.
   Univ Liege, Dept Geomat, Lab Surfaces, B-4000 Liege, Belgium.
C2 CNRS, FRANCE
   UNIV TASMANIA, AUSTRALIA
   MNHN, FRANCE
   UNIV LIEGE, BELGIUM
SI AUTRE
SE AUTRE
IF 1.903
TC 170
UR https://archimer.ifremer.fr/doc/00247/35843/34354.pdf
LA English
DT Article
CR ICHTYOKER
   OISO - OCÉAN INDIEN SERVICE D'OBSERVATION
BO La Curieuse
DE ;Antarctic fur seal;diet;oceanographic conditions;foraging;geographic information system
AB 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.
PY 2001
PD SEP
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-research
VL 219
UT 000171439300021
BP 251
EP 264
DI 10.3354/meps219251
ID 35843
ER

EF