Data

Southern elephant seal demography

Australian Ocean Data Network
Volzke, Sophia ; McMahon, Clive ; Wotherspoon, Simon
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:doi10.25959/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=Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/&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=The data described in this record are the intellectual property of the University of Tasmania through the Institute for Marine and Antarctic Studies.&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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Creative Commons Attribution 4.0 International License
http://creativecommons.org/licenses/by/4.0/

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

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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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

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158.9571,-54.478 158.9571,-54.7864 158.7634,-54.7864 158.7634,-54.478 158.9571,-54.478

158.86025,-54.6322

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

Subjects
AGRICULTURE | ANIMAL ECOLOGY AND BEHAVIOR | ANIMAL SCIENCE | CLIMATE INDICATORS | EARTH SCIENCE | EARTH SCIENCE | BIOSPHERE | ECOSYSTEMS | MARINE ECOSYSTEMS | Macquarie Island | Mirounga leonina | Offshore Islands (Australia) | Offshore Islands (Australia) | Macquarie Island | biota | breeding population | capital breeder | demographic modelling | mark-recapture studies | predator demography | predator ecology | resight effort | southern elephant seal |

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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

(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

(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

(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

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