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Seal database of known-age animals Entry ID: TAGS |
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Summary
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Abstract:
This database is a compendium of histories of known age seals (Weddell and Southern elephant) from observations across the Southern Ocean but focussed on Macquarie Island, Marion Island, Heard Island, Mawson and the Vestfold Hills. 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. At Marion Island all the elephant seals have been individually marked with two plastic flipper tags in their rear flippers. Recaptures of these seals were used to compare survival at Marion and Macquarie Islands. At Heard Island, seals were branded between 1949-1953. Seal length was measured in feet and inches. Recaptures of seals were made up until 1955, and growth and age-specific survival was calculated. Survival data from Heard Island were compared with concurrent data from Macquarie Island. The database is held by the Australian Antarctic Data Centre. This work was completed as part of ASAC project 90. |
Related URL
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Link:
GET DATA
Description: Seal Tagging Database Link: VIEW PROJECT HOME PAGE Description: Public information for ASAC project 90 Link: VIEW RELATED INFORMATION Description: Citation reference for this metadata record and dataset |
Geographic Coverage
| N: -42.0 | S: -68.0 | E: -80.0 | W: 35.0 |
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Temporal Coverage
| Start Date: 1950-01-01 |
Location Keywords
Science Keywords
| BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES [Definition] |
| BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >MAMMALS [Definition] |
ISO Topic Category
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BIOTA
OCEANS |
Project
| OBIS >OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM [Information] |
| COML >CENSUS OF MARINE LIFE [Information] |
Quality
| Observations are approximately 95% accurate. Errors in observation and entry possible where animals are misplaced. |
Access Constraints
| The database is held by the Australian Antarctic Data Centre. Contact the investigator for access. |
Use Constraints
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This data set conforms to the PICCCBY Attribution License (http://creativecommons.org/licenses/by/3.0/). Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=TAGS when using these data. |
Keywords
| MACQUARIE ISLAND |
| MARION ISLAND |
| MAWSON |
| SOUTHERN ELEPHANT SEAL |
| VESTFOLD HILLS |
| WEDDELL SEAL |
Data Set Progress
| IN WORK |
Data Center
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Australian Antarctic Data Centre, Australia
[Information]
Data Center URL: http://data.aad.gov.au
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Distribution
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Distribution_Media:
HTTP
Fees: Free |
Personnel
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HARRY
BURTON Role: INVESTIGATOR Email: harry.burton at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia |
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CLIVE
MCMAHON Role: INVESTIGATOR Email: c.r.mcmahon at swansea.ac.uk Contact Address: University of Wales Swansea Singleton Park City: Swansea Province or State: Wales Postal Code: SA2 8PP Country: United Kingdom |
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JOHN
VAN DEN HOFF Role: TECHNICAL CONTACT Phone: +61 3 6232 3447 Fax: +61 3 6232 3351 Email: john_van at aad.gov.au Contact Address: Australian Antarctic Division 203 Channel Highway City: Kingston Province or State: Tasmania Postal Code: 7050 Country: Australia |
Creation and Review Dates
DIF Creation Date:
2000-05-08
Last DIF Revision Date:
2012-01-12
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