Data

Diet and Foraging Area of Antarctic Fur Seals at Heard Island

Australian Antarctic Data Centre
BURTON, HARRY
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.4225/15/5812874d9ab36&rft.title=Diet and Foraging Area of Antarctic Fur Seals at Heard Island&rft.identifier=10.4225/15/5812874d9ab36&rft.publisher=Australian Antarctic Data Centre&rft.description=Antarctic Fur Seals from Heard Island fed mainly on fish, but the prey species changed both seasonally and inter-annually. The majority of prey were pelagic myctophids characteristic of deep oceanic water, and were generally taken in autumn and winter. The only other fish taken in significant numbers was Champsocephalus gunnari which was mostly taken from late winter through early autumn when it was co-dominant in the diet with the Krefftichthys anderssoni. Males and females foraged in different localities and in different parts of the water column. Males foraged mainly to the south of Heard Island in winter usually diving deep by day, feeding on scattering layers. In summer males also fed on the shelf, presumably to the north and east of Heard Island on K. anderssoni at shallow depths primarily at night. Although diet studies provided little evidence of feeding on crustaceans, diving data indicate that some males may travel to Antarctic waters in winter to feed on krill. The fields in this dataset are: Months Species Scats Time foraging Number of Dives Time Submerged (minutes) Mean Dive Duration (minutes) Maximum Depth (metres)&rft.creator=BURTON, HARRY &rft.date=2000&rft.coverage=northlimit=-52.96022; southlimit=-53.20439; westlimit=73.23761; eastLimit=73.84735; projection=WGS84&rft.coverage=northlimit=-52.96022; southlimit=-53.20439; westlimit=73.23761; eastLimit=73.84735; projection=WGS84&rft_rights=This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_466 when using these data.&rft_subject=biota&rft_subject=oceans&rft_subject=ANIMALS/VERTEBRATES&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=MAMMALS&rft_subject=SEALS/SEA LIONS/WALRUSES&rft_subject=CARNIVORES&rft_subject=DEPTH&rft_subject=DIVE DURATION&rft_subject=FORAGING&rft_subject=FUR SEALS&rft_subject=FISH&rft_subject=HEARD ISLAND&rft_subject=NUMBER OF DIVES&rft_subject=MONTHS&rft_subject=SCATS&rft_subject=SOUTHERN OCEAN&rft_subject=SPECIES&rft_subject=TIME FORAGING&rft_subject=TIME SUBMERGED&rft_subject=VISUAL OBSERVATIONS&rft_subject=FIELD SURVEYS&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=GEOGRAPHIC REGION > POLAR&rft_subject=OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS&rft_place=Hobart&rft.type=dataset&rft.language=English Access the data
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This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_466 when using these data.

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Brief description

Antarctic Fur Seals from Heard Island fed mainly on fish, but the prey species changed both seasonally and inter-annually. The majority of prey were pelagic myctophids characteristic of deep oceanic water, and were generally taken in autumn and winter. The only other fish taken in significant numbers was Champsocephalus gunnari which was mostly taken from late winter through early autumn when it was co-dominant in the diet with the Krefftichthys anderssoni. Males and females foraged in different localities and in different parts of the water column. Males foraged mainly to the south of Heard Island in winter usually diving deep by day, feeding on scattering layers. In summer males also fed on the shelf, presumably to the north and east of Heard Island on K. anderssoni at shallow depths primarily at night. Although diet studies provided little evidence of feeding on crustaceans, diving data indicate that some males may travel to Antarctic waters in winter to feed on krill. The fields in this dataset are: Months Species Scats Time foraging Number of Dives Time Submerged (minutes) Mean Dive Duration (minutes) Maximum Depth (metres)

Issued: 2000-07-28

Data time period: 1992-02-01 to 1993-03-31

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73.84735,-52.96022 73.84735,-53.20439 73.23761,-53.20439 73.23761,-52.96022 73.84735,-52.96022

73.54248,-53.082305

text: northlimit=-52.96022; southlimit=-53.20439; westlimit=73.23761; eastLimit=73.84735; projection=WGS84

Subjects
ANIMALS/VERTEBRATES | BIOLOGICAL CLASSIFICATION | CARNIVORES | DEPTH | DIVE DURATION | EARTH SCIENCE | FIELD SURVEYS | FISH | FORAGING | FUR SEALS | GEOGRAPHIC REGION > POLAR | HEARD ISLAND | MAMMALS | MONTHS | NUMBER OF DIVES | OCEAN > SOUTHERN OCEAN | OCEAN > SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS | SCATS | SEALS/SEA LIONS/WALRUSES | SOUTHERN OCEAN | SPECIES | TIME FORAGING | TIME SUBMERGED | VISUAL OBSERVATIONS | biota | oceans |

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AU-ANL:PEAU : http://nla.gov.au/nla.party-617536

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