Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys
The number of Antarctic fur seals Arctocephalus gazella hauled out at Signy Island in the South Orkneys was monitored annually between 1977 and 2008. Over the study period seal abundance showed a tenfold increase, from a minimum of 1,643 seals in 1978 to a maximum of 21,303 in 1994. The majority of...
Published in: | Polar Biology |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Springer
2010
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/10722/ http://www.springerlink.com/content/ap7q8j37m3553310/fulltext.pdf |
id |
ftnerc:oai:nora.nerc.ac.uk:10722 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:10722 2023-05-15T13:45:10+02:00 Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys Waluda, Claire M. Gregory, Susan Dunn, Michael J. 2010 http://nora.nerc.ac.uk/id/eprint/10722/ http://www.springerlink.com/content/ap7q8j37m3553310/fulltext.pdf unknown Springer Waluda, Claire M. orcid:0000-0003-3517-5233 Gregory, Susan; Dunn, Michael J. orcid:0000-0003-4633-5466 . 2010 Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys. Polar Biology, 33 (3). 305-312. https://doi.org/10.1007/s00300-009-0706-2 <https://doi.org/10.1007/s00300-009-0706-2> Zoology Ecology and Environment Publication - Article PeerReviewed 2010 ftnerc https://doi.org/10.1007/s00300-009-0706-2 2023-02-04T19:26:54Z The number of Antarctic fur seals Arctocephalus gazella hauled out at Signy Island in the South Orkneys was monitored annually between 1977 and 2008. Over the study period seal abundance showed a tenfold increase, from a minimum of 1,643 seals in 1978 to a maximum of 21,303 in 1994. The majority of individuals observed were young adult males, likely to be migrants from South Georgia, with small numbers of female seals and only 65 pups recorded during the survey period. Variability in counts showed a similar pattern to Laurie Island, also in the South Orkneys archipelago, suggesting a similar annual immigration of seals to these two islands. The date of first seal arrival was correlated with the date of fast-ice breakout at Factory Cove, Signy Island, and years in which break out was exceptionally late (> 21 December) corresponded with years of reduced seal abundance. While the presence of fast-ice during the early breeding season may currently inhibit the establishment of a major breeding population of fur seals at Signy Island, it is important that routine monitoring should continue, particularly in the light of current patterns of climate warming in the Antarctic. Article in Journal/Newspaper Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella Laurie Island Polar Biology Signy Island Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Laurie ENVELOPE(-44.616,-44.616,-60.733,-60.733) Factory Cove ENVELOPE(-45.597,-45.597,-60.708,-60.708) Laurie Island ENVELOPE(-44.617,-44.617,-60.733,-60.733) Polar Biology 33 3 305 312 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Zoology Ecology and Environment |
spellingShingle |
Zoology Ecology and Environment Waluda, Claire M. Gregory, Susan Dunn, Michael J. Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys |
topic_facet |
Zoology Ecology and Environment |
description |
The number of Antarctic fur seals Arctocephalus gazella hauled out at Signy Island in the South Orkneys was monitored annually between 1977 and 2008. Over the study period seal abundance showed a tenfold increase, from a minimum of 1,643 seals in 1978 to a maximum of 21,303 in 1994. The majority of individuals observed were young adult males, likely to be migrants from South Georgia, with small numbers of female seals and only 65 pups recorded during the survey period. Variability in counts showed a similar pattern to Laurie Island, also in the South Orkneys archipelago, suggesting a similar annual immigration of seals to these two islands. The date of first seal arrival was correlated with the date of fast-ice breakout at Factory Cove, Signy Island, and years in which break out was exceptionally late (> 21 December) corresponded with years of reduced seal abundance. While the presence of fast-ice during the early breeding season may currently inhibit the establishment of a major breeding population of fur seals at Signy Island, it is important that routine monitoring should continue, particularly in the light of current patterns of climate warming in the Antarctic. |
format |
Article in Journal/Newspaper |
author |
Waluda, Claire M. Gregory, Susan Dunn, Michael J. |
author_facet |
Waluda, Claire M. Gregory, Susan Dunn, Michael J. |
author_sort |
Waluda, Claire M. |
title |
Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys |
title_short |
Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys |
title_full |
Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys |
title_fullStr |
Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys |
title_full_unstemmed |
Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys |
title_sort |
long-term variability in the abundance of antarctic fur seals arctocephalus gazella at signy island, south orkneys |
publisher |
Springer |
publishDate |
2010 |
url |
http://nora.nerc.ac.uk/id/eprint/10722/ http://www.springerlink.com/content/ap7q8j37m3553310/fulltext.pdf |
long_lat |
ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-44.616,-44.616,-60.733,-60.733) ENVELOPE(-45.597,-45.597,-60.708,-60.708) ENVELOPE(-44.617,-44.617,-60.733,-60.733) |
geographic |
Antarctic The Antarctic Signy Island Laurie Factory Cove Laurie Island |
geographic_facet |
Antarctic The Antarctic Signy Island Laurie Factory Cove Laurie Island |
genre |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella Laurie Island Polar Biology Signy Island |
genre_facet |
Antarc* Antarctic Antarctic Fur Seals Arctocephalus gazella Laurie Island Polar Biology Signy Island |
op_relation |
Waluda, Claire M. orcid:0000-0003-3517-5233 Gregory, Susan; Dunn, Michael J. orcid:0000-0003-4633-5466 . 2010 Long-term variability in the abundance of Antarctic fur seals Arctocephalus gazella at Signy Island, South Orkneys. Polar Biology, 33 (3). 305-312. https://doi.org/10.1007/s00300-009-0706-2 <https://doi.org/10.1007/s00300-009-0706-2> |
op_doi |
https://doi.org/10.1007/s00300-009-0706-2 |
container_title |
Polar Biology |
container_volume |
33 |
container_issue |
3 |
container_start_page |
305 |
op_container_end_page |
312 |
_version_ |
1766214253357826048 |