Data

Winter Foraging Locations Of Southern Ocean Predators - sub-Antarctic islands

Name: Winter Foraging Locations Of Southern Ocean Predators - sub-Antarctic islands
Published: 2008-06-13

Australian Antarctic Data Centre

HINDELL, MARK A. ; LEA, MARY-ANNE

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ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=info:doi10.26179/5bb6ef4045b29&rft.title=Winter Foraging Locations Of Southern Ocean Predators - sub-Antarctic islands&rft.identifier=10.26179/5bb6ef4045b29&rft.publisher=Australian Antarctic Data Centre&rft.description=Metadata record for data expected from ASAC Project 2940 See the link below for public details on this project. Public: The extent of Antarctic winter sea-ice influences all aspects of the Antarctic marine food-web. We will use natural variations in inter-annual ice extent, to assess how a key component of that ecosystem, the predators, use the sea ice zone. Core foraging areas and dietary signals for a key Antarctic predator (Antarctic fur seal) will be identified. We will use newly developed, technology to track the animals, and stable isotopes to examine tropic linkages. Combined with satellite-derived sea-ice data, this will lead to the development of a model to predict how changing sea-ice patterns will influence Antarctic marine predator communities. Project Objectives: 1. Use large samples of newly-developed (and tested) animal-borne miniature geolocating light level recorders to population level information on the spatial extent of movements of Antarctic fur seals, thereby quantifying the extent of the use of the winter pack-ice and associated waters by these abundant predators. 2. To quantify how changes in winter ice extent influence the location of core foraging areas for this species. 3. To develop models to investigate how changing ice conditions in the future will influence the movements of this species and to examine a range of climate-change scenarios. Taken from the 2007-2008 Progress Report: No field work was conducted at Macquarie Island in the last 12 months. This was due to the decision by the state government to not issue permits for the work. With the help of our colleagues from BAS we did however manage to deploy 20 GLS light loggers on Antarctic fur seals at South Georgia. Taken from the 2008-2009 Progress Report: Objective 1 has been revised to the study of Antarctic fur seals only (see below). Research is progressing well with 78 animals tracked in 2008 and a further 80 expected in 2009. Objectives 2 and 3 will follow once field data is available for both years (May 2010). Isotopic analysis of blood and whisker samples for the 2008 season will commence in May 2009 once samples have been received. Taken from the 2010-2011 Progress Report: Public summary of the season progress: This study has quantified the response of the Antarctic fur seal (Arctocephalus gazella) to inter-annual variation in oceanographic and winter ice conditions. We have measured the winter spatial foraging patterns of 66 adult females from three circum-Antarctic populations over two years (2008, 2009) during 114 trips to sea, while simultaneously recording in situ water temperature. Stable isotope analysis of fur seal blood and whisker samples indicates that adult females feed on a range of lower (krill) to higher (fish and squid) trophic levels across their winter range. Broad-scale habitat preferences across the range of the species indicate the importance of shelf, ice edge, frontal and oceanic and continental upwelling features in determining winter foraging movements.&rft.creator=HINDELL, MARK A. &rft.creator=LEA, MARY-ANNE &rft.date=2008&rft.coverage=northlimit=-45.0; southlimit=-70.0; westlimit=-180.0; eastLimit=180.0; projection=WGS84&rft.coverage=northlimit=-45.0; southlimit=-70.0; westlimit=-180.0; eastLimit=180.0; 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_2940 when using these data.&rft_subject=biota&rft_subject=oceans&rft_subject=PENGUINS&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/VERTEBRATES&rft_subject=BIRDS&rft_subject=SEALS/SEA LIONS/WALRUSES&rft_subject=MAMMALS&rft_subject=CARNIVORES&rft_subject=FOOD-WEB DYNAMICS&rft_subject=BIOSPHERE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=ECOSYSTEM FUNCTIONS&rft_subject=EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS&rft_subject=EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > COASTAL&rft_subject=EARTH SCIENCE > BIOSPHERE > ECOSYSTEMS > MARINE ECOSYSTEMS > PELAGIC&rft_subject=SEA ICE&rft_subject=CRYOSPHERE&rft_subject=ISLANDS&rft_subject=TERRESTRIAL ECOSYSTEMS&rft_subject=King Penguin&rft_subject=Macaroni Penguin&rft_subject=Antarctic Fur Seals&rft_subject=GLS Light Logger&rft_subject=Iles Kerguelen&rft_subject=Foraging&rft_subject=GPS > Global Positioning System&rft_subject=FIELD SURVEYS&rft_subject=FIELD INVESTIGATION&rft_subject=LABORATORY&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=OCEAN > ATLANTIC OCEAN > SOUTH ATLANTIC OCEAN > SOUTH GEORGIA ISLAND&rft_subject=OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND&rft_subject=GEOGRAPHIC REGION > POLAR&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_2940 when using these data.

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Brief description

Metadata record for data expected from ASAC Project 2940 See the link below for public details on this project.

Public:
The extent of Antarctic winter sea-ice influences all aspects of the Antarctic marine food-web. We will use natural variations in inter-annual ice extent, to assess how a key component of that ecosystem, the predators, use the sea ice zone. Core foraging areas and dietary signals for a key Antarctic predator (Antarctic fur seal) will be identified. We will use newly developed, technology to track the animals, and stable isotopes to examine tropic linkages. Combined with satellite-derived sea-ice data, this will lead to the development of a model to predict how changing sea-ice patterns will influence Antarctic marine predator communities.

Project Objectives:
1. Use large samples of newly-developed (and tested) animal-borne miniature geolocating light level recorders to population level information on the spatial extent of movements of Antarctic fur seals, thereby quantifying the extent of the use of the winter pack-ice and associated waters by these abundant predators.
2. To quantify how changes in winter ice extent influence the location of core foraging areas for this species.
3. To develop models to investigate how changing ice conditions in the future will influence the movements of this species and to examine a range of climate-change scenarios.

Taken from the 2007-2008 Progress Report:
No field work was conducted at Macquarie Island in the last 12 months. This was due to the decision by the state government to not issue permits for the work.

With the help of our colleagues from BAS we did however manage to deploy 20 GLS light loggers on Antarctic fur seals at South Georgia.

Taken from the 2008-2009 Progress Report:
Objective 1 has been revised to the study of Antarctic fur seals only (see below). Research is progressing well with 78 animals tracked in 2008 and a further 80 expected in 2009.
Objectives 2 and 3 will follow once field data is available for both years (May 2010).
Isotopic analysis of blood and whisker samples for the 2008 season will commence in May 2009 once samples have been received.

Taken from the 2010-2011 Progress Report:
Public summary of the season progress:
This study has quantified the response of the Antarctic fur seal (Arctocephalus gazella) to inter-annual variation in oceanographic and winter ice conditions. We have measured the winter spatial foraging patterns of 66 adult females from three circum-Antarctic populations over two years (2008, 2009) during 114 trips to sea, while simultaneously recording in situ water temperature. Stable isotope analysis of fur seal blood and whisker samples indicates that adult females feed on a range of lower (krill) to higher (fish and squid) trophic levels across their winter range. Broad-scale habitat preferences across the range of the species indicate the importance of shelf, ice edge, frontal and oceanic and continental upwelling features in determining winter foraging movements.

Issued: 2008-06-13

Data time period: 2007-09-30 to 2011-03-31

This dataset is part of a larger collection

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text: northlimit=-45.0; southlimit=-70.0; westlimit=-180.0; eastLimit=180.0; projection=WGS84

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

Identifiers

global : 065126f3-d075-48e3-b782-e87f545238a2
DOI : 10.26179/5bb6ef4045b29
Local : ASAC_2940
URI : https://data.aad.gov.au/metadata/records/ASAC_2940
URI : https://data.aad.gov.au/metadata/records/ASAC_2940

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