Diet and Foraging Area of Antarctic Fur Seals at Heard Island
Collections were made on a monthly basis from February 1992 through to March 1993. In winter, scats were only collected on new snow because it was difficult to determine the age of scats exposed by frequent snow thaws. Antarctic Fur Seals from Heard Island fed mainly on fish, but the prey species ch...
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Australian Ocean Data Network
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Online Access: | https://researchdata.ands.org.au/diet-foraging-area-heard-island/685832 https://data.aad.gov.au/metadata/records/ASAC_466 https://data.aad.gov.au/eds/1004/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=466 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_466 |
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ftands:oai:ands.org.au::685832 2023-05-15T13:46:55+02:00 Diet and Foraging Area of Antarctic Fur Seals at Heard Island AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) Spatial: northlimit=-52.96022; southlimit=-53.20439; westlimit=73.23761; eastLimit=73.84735 Temporal: From 1992-02-01 to 1993-03-31 https://researchdata.ands.org.au/diet-foraging-area-heard-island/685832 https://data.aad.gov.au/metadata/records/ASAC_466 https://data.aad.gov.au/eds/1004/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=466 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_466 unknown Australian Ocean Data Network https://researchdata.ands.org.au/diet-foraging-area-heard-island/685832 2f2662a7-ed02-40b8-b873-dd1e8f8f2391 https://data.aad.gov.au/metadata/records/ASAC_466 https://data.aad.gov.au/eds/1004/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=466 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_466 https://data.aad.gov.au biota oceans ANIMALS/VERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION MAMMALS SEALS/SEA LIONS/WALRUSES CARNIVORES DEPTH DIVE DURATION FORAGING FUR SEALS FISH HEARD ISLAND NUMBER OF DIVES MONTHS SCATS SOUTHERN OCEAN SPECIES TIME FORAGING TIME SUBMERGED VISUAL OBSERVATIONS FIELD SURVEYS AMD/AU CEOS AMD OCEAN > GEOGRAPHIC REGION > POLAR SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS dataset ftands 2020-01-05T21:06:42Z Collections were made on a monthly basis from February 1992 through to March 1993. In winter, scats were only collected on new snow because it was difficult to determine the age of scats exposed by frequent snow thaws. 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) Dataset Antarc* Antarctic Antarctic Fur Seals Heard Island McDonald Islands Southern Ocean walrus* Research Data Australia (Australian National Data Service - ANDS) Antarctic Heard ENVELOPE(73.510,73.510,-53.117,-53.117) Heard Island Heard Island ENVELOPE(73.510,73.510,-53.117,-53.117) McDonald Islands ENVELOPE(72.600,72.600,-53.033,-53.033) Southern Ocean ENVELOPE(73.23761,73.84735,-52.96022,-53.20439) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
biota oceans ANIMALS/VERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION MAMMALS SEALS/SEA LIONS/WALRUSES CARNIVORES DEPTH DIVE DURATION FORAGING FUR SEALS FISH HEARD ISLAND NUMBER OF DIVES MONTHS SCATS SOUTHERN OCEAN SPECIES TIME FORAGING TIME SUBMERGED VISUAL OBSERVATIONS FIELD SURVEYS AMD/AU CEOS AMD OCEAN > GEOGRAPHIC REGION > POLAR SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS |
spellingShingle |
biota oceans ANIMALS/VERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION MAMMALS SEALS/SEA LIONS/WALRUSES CARNIVORES DEPTH DIVE DURATION FORAGING FUR SEALS FISH HEARD ISLAND NUMBER OF DIVES MONTHS SCATS SOUTHERN OCEAN SPECIES TIME FORAGING TIME SUBMERGED VISUAL OBSERVATIONS FIELD SURVEYS AMD/AU CEOS AMD OCEAN > GEOGRAPHIC REGION > POLAR SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS Diet and Foraging Area of Antarctic Fur Seals at Heard Island |
topic_facet |
biota oceans ANIMALS/VERTEBRATES EARTH SCIENCE BIOLOGICAL CLASSIFICATION MAMMALS SEALS/SEA LIONS/WALRUSES CARNIVORES DEPTH DIVE DURATION FORAGING FUR SEALS FISH HEARD ISLAND NUMBER OF DIVES MONTHS SCATS SOUTHERN OCEAN SPECIES TIME FORAGING TIME SUBMERGED VISUAL OBSERVATIONS FIELD SURVEYS AMD/AU CEOS AMD OCEAN > GEOGRAPHIC REGION > POLAR SOUTHERN OCEAN > HEARD AND MCDONALD ISLANDS |
description |
Collections were made on a monthly basis from February 1992 through to March 1993. In winter, scats were only collected on new snow because it was difficult to determine the age of scats exposed by frequent snow thaws. 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) |
author2 |
AADC (originator) AU/AADC > Australian Antarctic Data Centre, Australia (resourceProvider) |
format |
Dataset |
title |
Diet and Foraging Area of Antarctic Fur Seals at Heard Island |
title_short |
Diet and Foraging Area of Antarctic Fur Seals at Heard Island |
title_full |
Diet and Foraging Area of Antarctic Fur Seals at Heard Island |
title_fullStr |
Diet and Foraging Area of Antarctic Fur Seals at Heard Island |
title_full_unstemmed |
Diet and Foraging Area of Antarctic Fur Seals at Heard Island |
title_sort |
diet and foraging area of antarctic fur seals at heard island |
publisher |
Australian Ocean Data Network |
url |
https://researchdata.ands.org.au/diet-foraging-area-heard-island/685832 https://data.aad.gov.au/metadata/records/ASAC_466 https://data.aad.gov.au/eds/1004/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=466 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_466 |
op_coverage |
Spatial: northlimit=-52.96022; southlimit=-53.20439; westlimit=73.23761; eastLimit=73.84735 Temporal: From 1992-02-01 to 1993-03-31 |
long_lat |
ENVELOPE(73.510,73.510,-53.117,-53.117) ENVELOPE(73.510,73.510,-53.117,-53.117) ENVELOPE(72.600,72.600,-53.033,-53.033) ENVELOPE(73.23761,73.84735,-52.96022,-53.20439) |
geographic |
Antarctic Heard Heard Island Heard Island McDonald Islands Southern Ocean |
geographic_facet |
Antarctic Heard Heard Island Heard Island McDonald Islands Southern Ocean |
genre |
Antarc* Antarctic Antarctic Fur Seals Heard Island McDonald Islands Southern Ocean walrus* |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Heard Island McDonald Islands Southern Ocean walrus* |
op_source |
https://data.aad.gov.au |
op_relation |
https://researchdata.ands.org.au/diet-foraging-area-heard-island/685832 2f2662a7-ed02-40b8-b873-dd1e8f8f2391 https://data.aad.gov.au/metadata/records/ASAC_466 https://data.aad.gov.au/eds/1004/download https://secure3.aad.gov.au/proms/public/projects/report_project_public.cfm?project_no=466 http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_466 |
_version_ |
1766245647187443712 |