Data

Prey species found within Hooker Sea Lion scats

Australian Antarctic Data Centre
MCMAHON, CLIVE
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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:doi10.26179/5b88a32da31ac&rft.title=Prey species found within Hooker Sea Lion scats&rft.identifier=10.26179/5b88a32da31ac&rft.publisher=Australian Antarctic Data Centre&rft.description=This dataset is a collection of presence-absence and %occurrence data of prey species found within scats of Hooker Sea Lions. The data are presented in an excel spreadsheet. Samples were collected from 54 scats. From the abstract of the referenced paper: Scats were collected from itinerant male Hooker's sea lions, Phocarctos hookeri, at Macquarie Island and the un-eroded faunal remains used to assess the diet. Un-eroded sagittal otoliths were used to identify teleost fish and to calculate fish size. Prey items included 14 taxa of teleost fish, cephalopods, gastropods, crustaceans and fur seals. Fish constituted the primary component of the diet. Prey species previously uncommon in the diet of seals and penguins around Macquarie Island were commonly eaten by Hooker's sea lions. The sub-Antarctic horse fish (Zanclorhynchus spinifer) and the Patagonian tooth fish (Dissostichus eleginoides) were the two most abundant species and occurred in 62.5% and 41.7% of all scats respectively. There were no age specific and individual differences in the diet of sea lions. Seasonal variances in diet were absent. Small plastic fragments (diameter ~ 1mm) were only found in association with Electrona subaspera otoliths. Some overlap was seen between the diet of itinerant male Hooker's sea lions and the commercial fisheries that currently occur around Macquarie Island. This work was completed as part of ASAC project 2265 (ASAC_2265).&rft.creator=MCMAHON, CLIVE &rft.date=2006&rft.coverage=northlimit=-54.48; southlimit=-54.79; westlimit=158.76; eastLimit=158.965; projection=WGS84&rft.coverage=northlimit=-54.48; southlimit=-54.79; westlimit=158.76; eastLimit=158.965; 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=hookers_sea_lion_scats when using these data.&rft_subject=biota&rft_subject=oceans&rft_subject=EXCRETION RATES&rft_subject=EARTH SCIENCE&rft_subject=BIOSPHERE&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=ECOSYSTEM FUNCTIONS&rft_subject=SPECIES PREDATION&rft_subject=SPECIES/POPULATION INTERACTIONS&rft_subject=SEALS/SEA LIONS/WALRUSES&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=ANIMALS/VERTEBRATES&rft_subject=MAMMALS&rft_subject=CARNIVORES&rft_subject=Hooker's sea lion&rft_subject=Macquarie Island&rft_subject=scats&rft_subject=faeces&rft_subject=prey&rft_subject=fish&rft_subject=species&rft_subject=VISUAL OBSERVATIONS&rft_subject=LABORATORY&rft_subject=FIELD INVESTIGATION&rft_subject=OCEAN > SOUTHERN OCEAN&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=hookers_sea_lion_scats when using these data.

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These data are available for download from the provided URL. A copy of the referenced paper is also available for download from the provided URL to AAD staff only.

Brief description

This dataset is a collection of presence-absence and %occurrence data of prey species found within scats of Hooker Sea Lions. The data are presented in an excel spreadsheet. Samples were collected from 54 scats. From the abstract of the referenced paper: Scats were collected from itinerant male Hooker's sea lions, Phocarctos hookeri, at Macquarie Island and the un-eroded faunal remains used to assess the diet. Un-eroded sagittal otoliths were used to identify teleost fish and to calculate fish size. Prey items included 14 taxa of teleost fish, cephalopods, gastropods, crustaceans and fur seals. Fish constituted the primary component of the diet. Prey species previously uncommon in the diet of seals and penguins around Macquarie Island were commonly eaten by Hooker's sea lions. The sub-Antarctic horse fish (Zanclorhynchus spinifer) and the Patagonian tooth fish (Dissostichus eleginoides) were the two most abundant species and occurred in 62.5% and 41.7% of all scats respectively. There were no age specific and individual differences in the diet of sea lions. Seasonal variances in diet were absent. Small plastic fragments (diameter ~ 1mm) were only found in association with Electrona subaspera otoliths. Some overlap was seen between the diet of itinerant male Hooker's sea lions and the commercial fisheries that currently occur around Macquarie Island. This work was completed as part of ASAC project 2265 (ASAC_2265).

Issued: 2006-11-29

Data time period: 1996-11-01 to 1997-11-30

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158.965,-54.48 158.965,-54.79 158.76,-54.79 158.76,-54.48 158.965,-54.48

158.8625,-54.635

text: northlimit=-54.48; southlimit=-54.79; westlimit=158.76; eastLimit=158.965; projection=WGS84

Subjects
ANIMALS/VERTEBRATES | BIOLOGICAL CLASSIFICATION | BIOSPHERE | CARNIVORES | EARTH SCIENCE | ECOLOGICAL DYNAMICS | ECOSYSTEM FUNCTIONS | EXCRETION RATES | FIELD INVESTIGATION | GEOGRAPHIC REGION > POLAR | Hooker's sea lion | LABORATORY | MAMMALS | Macquarie Island | OCEAN > SOUTHERN OCEAN | OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND | SEALS/SEA LIONS/WALRUSES | SPECIES PREDATION | SPECIES/POPULATION INTERACTIONS | VISUAL OBSERVATIONS | biota | faeces | fish | oceans | prey | scats | species |

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

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