Seal database of known-age animals
Entry ID: TAGS
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 was held by the Australian Antarctic Data Centre, but was taken offline due to maintenance problems. A snapshot of the database was taken in January 2015 and stored in an access database.
This work was completed as part of ASAC project 90.
View Related Information
Description: Download the January 2015 snapshot of the Seal Tagging Database
Link: View Related Information
Description: Public information for ASAC project 90
Link: View Related Information
Description: Citation reference for this metadata record and dataset
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Data Set Citation
Burton, H., McMahon, C. and van den Hoff, J.
Dataset Title: Seal database of known-age animals
Dataset Series Name: CAASM Metadata
Dataset Publisher: Australian Antarctic Data Centre
Online Resource: https://data.aad.gov.au/aadc/metadata/metadata_redirect.cfm?md=/AMD...
|Start Date: 1950-01-01|
|Stop Date: 2015-01-31|
|BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES [Definition]|
|BIOLOGICAL CLASSIFICATION >ANIMALS/VERTEBRATES >MAMMALS [Definition]|
ISO Topic Category
|OBIS >OCEAN BIOGEOGRAPHIC INFORMATION SYSTEM [Information]|
|COML >CENSUS OF MARINE LIFE [Information]|
|Observations are approximately 95% accurate. Errors in observation and entry possible where animals are misplaced.|
|A snapshot copy of the database taken in January 2015, but it is not publicly available for download. For access, contact the Australian Antarctic Data Centre.|
This data set conforms to the PICCCBY Attribution License|
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.
|SOUTHERN ELEPHANT SEAL|
Data Set Progress
|Australian Antarctic Division|
Australian Antarctic Data Centre, Australia
Data Center URL: http://data.aad.gov.au
Email: c.r.mcmahon at swansea.ac.uk
University of Wales Swansea
Province or State: Wales
Postal Code: SA2 8PP
Country: United Kingdom
VAN DEN HOFF |
Role: TECHNICAL CONTACT
Phone: +61 3 6232 3447
Fax: +61 3 6232 3351
Email: john_van at aad.gov.au
Australian Antarctic Division
203 Channel Highway
Province or State: Tasmania
Postal Code: 7050