Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica
Abstract The Ross seal ( Ommatophoca rossii ) is the least studied of the Antarctic ice-breeding phocids. In particular, estimating the population status of the Ross seal has proved extremely difficult. The Protocol on Environmental Protection to the Antarctic Treaty currently designates the Ross se...
Published in: | Antarctic Science |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2008
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0954102007000879 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000879 |
id |
crcambridgeupr:10.1017/s0954102007000879 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0954102007000879 2024-04-28T07:57:07+00:00 Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica Southwell, Colin J. Paxton, Charles G.M. Borchers, David L. Boveng, Peter L. Nordøy, Erling S. Blix, Arnoldus Schytte De La Mare, William K. 2008 http://dx.doi.org/10.1017/s0954102007000879 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000879 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Antarctic Science volume 20, issue 2, page 123-133 ISSN 0954-1020 1365-2079 Geology Ecology, Evolution, Behavior and Systematics Oceanography journal-article 2008 crcambridgeupr https://doi.org/10.1017/s0954102007000879 2024-04-09T06:55:03Z Abstract The Ross seal ( Ommatophoca rossii ) is the least studied of the Antarctic ice-breeding phocids. In particular, estimating the population status of the Ross seal has proved extremely difficult. The Protocol on Environmental Protection to the Antarctic Treaty currently designates the Ross seal as a ‘Specially Protected Species’, contrasting with the IUCN's classification of ‘Least Concern’. As part of a review of the Ross seal's classification under the Protocol, a survey was undertaken in 1999/2000 to estimate the status of the Ross seal population in the pack ice off East Antarctica between 64–150°E. Shipboard and aerial sighting surveys were carried out along 9476 km of transect to estimate the density of Ross seals hauled out on the ice, and satellite dive recorders deployed on a sample of Ross seals to estimate the proportion of time spent on the ice. The survey design and analysis addressed the many sources of uncertainty in estimating the abundance of this species in an effort to provide a range of best and plausible estimates. Best estimates of abundance in the survey region ranged from 41 300–55 900 seals. Limits on plausible estimates ranged from 20 500 (lower 2.5 percentile) to 226 600 (upper 97.5 percentile). Article in Journal/Newspaper Antarc* Antarctic Antarctic Science Antarctica East Antarctica Ross Seal Cambridge University Press Antarctic Science 20 2 123 133 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
spellingShingle |
Geology Ecology, Evolution, Behavior and Systematics Oceanography Southwell, Colin J. Paxton, Charles G.M. Borchers, David L. Boveng, Peter L. Nordøy, Erling S. Blix, Arnoldus Schytte De La Mare, William K. Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica |
topic_facet |
Geology Ecology, Evolution, Behavior and Systematics Oceanography |
description |
Abstract The Ross seal ( Ommatophoca rossii ) is the least studied of the Antarctic ice-breeding phocids. In particular, estimating the population status of the Ross seal has proved extremely difficult. The Protocol on Environmental Protection to the Antarctic Treaty currently designates the Ross seal as a ‘Specially Protected Species’, contrasting with the IUCN's classification of ‘Least Concern’. As part of a review of the Ross seal's classification under the Protocol, a survey was undertaken in 1999/2000 to estimate the status of the Ross seal population in the pack ice off East Antarctica between 64–150°E. Shipboard and aerial sighting surveys were carried out along 9476 km of transect to estimate the density of Ross seals hauled out on the ice, and satellite dive recorders deployed on a sample of Ross seals to estimate the proportion of time spent on the ice. The survey design and analysis addressed the many sources of uncertainty in estimating the abundance of this species in an effort to provide a range of best and plausible estimates. Best estimates of abundance in the survey region ranged from 41 300–55 900 seals. Limits on plausible estimates ranged from 20 500 (lower 2.5 percentile) to 226 600 (upper 97.5 percentile). |
format |
Article in Journal/Newspaper |
author |
Southwell, Colin J. Paxton, Charles G.M. Borchers, David L. Boveng, Peter L. Nordøy, Erling S. Blix, Arnoldus Schytte De La Mare, William K. |
author_facet |
Southwell, Colin J. Paxton, Charles G.M. Borchers, David L. Boveng, Peter L. Nordøy, Erling S. Blix, Arnoldus Schytte De La Mare, William K. |
author_sort |
Southwell, Colin J. |
title |
Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica |
title_short |
Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica |
title_full |
Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica |
title_fullStr |
Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica |
title_full_unstemmed |
Estimating population status under conditions of uncertainty: the Ross seal in East Antarctica |
title_sort |
estimating population status under conditions of uncertainty: the ross seal in east antarctica |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s0954102007000879 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102007000879 |
genre |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Ross Seal |
genre_facet |
Antarc* Antarctic Antarctic Science Antarctica East Antarctica Ross Seal |
op_source |
Antarctic Science volume 20, issue 2, page 123-133 ISSN 0954-1020 1365-2079 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0954102007000879 |
container_title |
Antarctic Science |
container_volume |
20 |
container_issue |
2 |
container_start_page |
123 |
op_container_end_page |
133 |
_version_ |
1797586868045348864 |