Data

Southern elephant seal demography

University of Tasmania, Australia

Volzke, Sophia ; McMahon, Clive ; Wotherspoon, Simon

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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:doi10.25959/W2SC-E717&rft.title=Southern elephant seal demography&rft.identifier=10.25959/W2SC-E717&rft.description=The Southern Ocean has been disproportionately affected by climate change and is therefore an ideal place to study the influence of changing environmental conditions on ecosystems. Changes in the demography of predator populations are indicators of broader shifts in food-web structure, but long-term data are required to study these effects. Southern elephant seals (Mirounga leonina) from Macquarie Island have consistently decreased in population size while all other major populations across the Southern Ocean have recently stabilised or are increasing. Two long-term mark-recapture studies (1956-1967 and 1993-2009) have monitored this population, which provides an opportunity to investigate demographic performance over a range of climatic conditions. This provides insights on individual vital rates of known-age seals from Macquarie Island over extensively long timeseries.Maintenance and Update Frequency: notPlannedStatement: Between 1951–1965 and 1993–1999 weaned Southern Elephant Seals were captured and marked permanently by hot iron branding. Seals were recorded in regular re-sights varying from daily isthmus searches during the breeding season to ad-hoc sightings outside of active monitoring. Biological data from individual short-term scientific projects include information on the physical condition for a sub-set of pups and adult seals. This record includes the code and materials for analytical tools used to study climate influences on individual survival.&rft.creator=Volzke, Sophia &rft.creator=McMahon, Clive &rft.creator=Wotherspoon, Simon &rft.date=2020&rft.coverage=westlimit=158.7634; southlimit=-54.7864; eastlimit=158.9571; northlimit=-54.478&rft.coverage=westlimit=158.7634; southlimit=-54.7864; eastlimit=158.9571; northlimit=-54.478&rft_rights=The data described in this record are the intellectual property of the University of Tasmania through the Institute for Marine and Antarctic Studies.&rft_rights= http://creativecommons.org/licenses/by/4.0/&rft_rights=http://i.creativecommons.org/l/by/4.0/88x31.png&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Graphic&rft_rights=Creative Commons Attribution 4.0 International License&rft_rights=http://creativecommons.org/international/&rft_rights=WWW:LINK-1.0-http--related&rft_rights=WWW:LINK-1.0-http--related&rft_rights=License Text&rft_rights=Cite data as: Volzke, S., McMahon, C., & Wotherspoon, S. (2023). Southern elephant seal demography [Data set]. Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS). https://doi.org/10.25959/W2SC-E717&rft_rights=Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0&rft_subject=biota&rft_subject=mark-recapture studies&rft_subject=demographic modelling&rft_subject=predator demography&rft_subject=resight effort&rft_subject=Macquarie Island&rft_subject=breeding population&rft_subject=Mirounga leonina&rft_subject=southern elephant seal&rft_subject=capital breeder&rft_subject=predator ecology&rft_subject=ANIMAL ECOLOGY AND BEHAVIOR&rft_subject=EARTH SCIENCE&rft_subject=AGRICULTURE&rft_subject=ANIMAL SCIENCE&rft_subject=EARTH SCIENCE | BIOSPHERE | ECOSYSTEMS | MARINE ECOSYSTEMS&rft_subject=CLIMATE INDICATORS&rft_subject=Offshore Islands (Australia) | Offshore Islands (Australia) | Macquarie Island&rft.type=dataset&rft.language=English Access the data

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The data described in this record are the intellectual property of the University of Tasmania through the Institute for Marine and Antarctic Studies.

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Cite data as: Volzke, S., McMahon, C., & Wotherspoon, S. (2023). Southern elephant seal demography [Data set]. Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS). https://doi.org/10.25959/W2SC-E717

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Brief description

The Southern Ocean has been disproportionately affected by climate change and is therefore an ideal place to study the influence of changing environmental conditions on ecosystems. Changes in the demography of predator populations are indicators of broader shifts in food-web structure, but long-term data are required to study these effects. Southern elephant seals (Mirounga leonina) from Macquarie Island have consistently decreased in population size while all other major populations across the Southern Ocean have recently stabilised or are increasing. Two long-term mark-recapture studies (1956-1967 and 1993-2009) have monitored this population, which provides an opportunity to investigate demographic performance over a range of climatic conditions. This provides insights on individual vital rates of known-age seals from Macquarie Island over extensively long timeseries.

Lineage

Maintenance and Update Frequency: notPlanned

Statement: Between 1951–1965 and 1993–1999 weaned Southern Elephant Seals were captured and marked permanently by hot iron branding. Seals were recorded in regular re-sights varying from daily isthmus searches during the breeding season to ad-hoc sightings outside of active monitoring. Biological data from individual short-term scientific projects include information on the physical condition for a sub-set of pups and adult seals.

This record includes the code and materials for analytical tools used to study climate influences on individual survival.

Notes

Credit
The Australian Antarctic Division through the Australian National Antarctic Research Expeditions (ANARE) supported this research. The study was carried out at Macquarie Island under ethics approval to Harry Burton from the Australian Antarctic Animal Ethics Committee (AAS 2265 & AAS 2794) and the Tasmanian Parks and Wildlife Service.

Data time period: 1951-01-01

This dataset is part of a larger collection

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text: westlimit=158.7634; southlimit=-54.7864; eastlimit=158.9571; northlimit=-54.478

Subjects

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Other Information

(README - data file structure and R-markdown instructions)

uri : https://data.imas.utas.edu.au/attachments/94f859d3-922b-4fdd-b6e9-3a6186477bdc/README.txt External Link

(DATA ACCESS - download full data package (including code) [.zip 6MB])

uri : https://data.imas.utas.edu.au/attachments/94f859d3-922b-4fdd-b6e9-3a6186477bdc/Volzke_MPM-2023.zip External Link

(Extreme polygyny results in intersex differences in age-dependent survival of a highly dimorphic marine mammal [related publication])

doi : https://royalsocietypublishing.org/doi/10.1098/rsos.221635 DOI Link

(Climate influences on female survival in a declining population of southern elephant seals (Mirounga leonina) [related publication])

doi : https://onlinelibrary.wiley.com/doi/full/10.1002/ece3.7919 DOI Link

Identifiers

DOI : 10.25959/W2SC-E717
global : 94f859d3-922b-4fdd-b6e9-3a6186477bdc

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