Data

Subset of data from the TAGS database of known age seals - Leopard Seals

Australian Antarctic Division
Burton, H., McMahon, C. and van den Hoff, J. ; BURTON, HARRY ; MCMAHON, CLIVE ; VAN DEN HOFF, JOHN
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:doi10.4225/15/5b347f46b2f6f&rft.title=Subset of data from the TAGS database of known age seals - Leopard Seals&rft.identifier=10.4225/15/5b347f46b2f6f&rft.publisher=Australian Antarctic Data Centre&rft.description=This database is a compendium of histories of known age seals (leopard) from observations across the Southern Ocean but primarily focussed on Macquarie Island. Although the following information pertains to Elephant Seals, it is assumed similar procedures were undertaken with the Leopard Seals between 1957 and 1999:At Macquarie Island 1000 seals were weighed per annum between 1993-2003 at birth and individually marked with two plastic flipper tags in the inter-digital webbing of their hind flippers. These tagged seals were weighed again at weaning, when length, girth, fat depth, and flipper measurements were made. Three weeks after weaning 2000 seals were permanently and individually marked by hot-iron branding. Recaptures and re-weighings of these known aged individuals were used to calculate growth and age-specific survival of the seals.Similar data were collected from elephant seals between 1950 and 1965 when seals were individually marked by hot-iron branding. Mark-recapture data from these cohorts were used to assess the demography of the declining population. Length and mass data were also collected for these cohorts and were used, for the first time, to assess the growth of individual seals without killing them.The database was held by the Australian Antarctic Data Centre, but was taken offline due to maintenance problems. A snapshot of the database was taken in June 2018 and stored in an access database.This work was completed as part of ASAC project 90.Progress Code: completedStatement: Observations are approximately 95% accurate. Errors in observation and entry possible where animals are misplaced.&rft.creator=Burton, H., McMahon, C. and van den Hoff, J. &rft.creator=BURTON, HARRY &rft.creator=MCMAHON, CLIVE &rft.creator=VAN DEN HOFF, JOHN &rft.date=2018&rft.coverage=westlimit=158.76; southlimit=-54.79; eastlimit=158.965; northlimit=-54.48&rft.coverage=westlimit=158.76; southlimit=-54.79; eastlimit=158.965; northlimit=-54.48&rft_rights=These data had been held in an online database, but that application has since been removed from the live pages of the Australian Antarctic Data Centre. An extract of the database was taken in June, 2018 and has been attached to this metadata record. It is publicly available for download from the provided URL.&rft_rights=Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/legalcode&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=TAGS_Leopard_Seals when using these data.&rft_rights=This metadata record is publicly available.&rft_subject=biota&rft_subject=oceans&rft_subject=EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES&rft_subject=MACQUARIE ISLAND&rft_subject=LEOPARD SEAL&rft_subject=VISUAL OBSERVATIONS&rft_subject=FIELD SURVEYS&rft_subject=OBIS > OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM&rft_subject=COML > CENSUS OF MARINE LIFE&rft_subject=AMD/AU&rft_subject=CEOS&rft_subject=AMD&rft_subject=OCEAN > SOUTHERN OCEAN&rft_subject=OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND&rft_subject=GEOGRAPHIC REGION > POLAR&rft.type=dataset&rft.language=English Access the data
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Attribution 4.0 International (CC BY 4.0)
https://creativecommons.org/licenses/by/4.0/legalcode

These data had been held in an online database, but that application has since been removed from the live pages of the Australian Antarctic Data Centre. An extract of the database was taken in June, 2018 and has been attached to this metadata record. It is publicly available for download from the provided URL.

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=TAGS_Leopard_Seals when using these data.

This metadata record is publicly available.

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Full description

This database is a compendium of histories of known age seals (leopard) from observations across the Southern Ocean but primarily focussed on Macquarie Island. Although the following information pertains to Elephant Seals, it is assumed similar procedures were undertaken with the Leopard Seals between 1957 and 1999:

"At Macquarie Island 1000 seals were weighed per annum between 1993-2003 at birth and individually marked with two plastic flipper tags in the inter-digital webbing of their hind flippers. These tagged seals were weighed again at weaning, when length, girth, fat depth, and flipper measurements were made. Three weeks after weaning 2000 seals were permanently and individually marked by hot-iron branding. Recaptures and re-weighings of these known aged individuals were used to calculate growth and age-specific survival of the seals.

Similar data were collected from elephant seals between 1950 and 1965 when seals were individually marked by hot-iron branding. Mark-recapture data from these cohorts were used to assess the demography of the declining population. Length and mass data were also collected for these cohorts and were used, for the first time, to assess the growth of individual seals without killing them."

The database was held by the Australian Antarctic Data Centre, but was taken offline due to maintenance problems. A snapshot of the database was taken in June 2018 and stored in an access database.

This work was completed as part of ASAC project 90.

Lineage

Progress Code: completed
Statement: Observations are approximately 95% accurate. Errors in observation and entry possible where animals are misplaced.

Data time period: 1957-06-27 to 1999-10-26

This dataset is part of a larger collection

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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: westlimit=158.76; southlimit=-54.79; eastlimit=158.965; northlimit=-54.48

Subjects
AMD | AMD/AU | CEOS | COML > CENSUS OF MARINE LIFE | EARTH SCIENCE > BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > MAMMALS > CARNIVORES > SEALS/SEA LIONS/WALRUSES | FIELD SURVEYS | GEOGRAPHIC REGION > POLAR | LEOPARD SEAL | MACQUARIE ISLAND | OBIS > OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM | OCEAN > SOUTHERN OCEAN | OCEAN > SOUTHERN OCEAN > MACQUARIE ISLAND | VISUAL OBSERVATIONS | biota | oceans |

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Other Information
Download the June 2018 snapshot of the Seal Tagging Database (GET DATA)

url : https://data.aad.gov.au/eds/4686/download

Public information for ASAC project 90 (PROJECT HOME PAGE)

url : https://projects.aad.gov.au/search_projects_results.cfm?project_no=90

Citation reference for this metadata record and dataset (VIEW RELATED INFORMATION)

url : http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=TAGS_Leopard_Seals

Identifiers
ACN 633 798 857