Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea
This study investigates how the local abundance of ringed seals (Phoca hispida) on landfast ice of the central Alaskan Beaufort Sea is related to habitat factors and how the haulout behaviour of seals is influenced by temporal and weather factors. An understanding of these relationships is required...
Published in: | Canadian Journal of Zoology |
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2002
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Online Access: | http://dx.doi.org/10.1139/z02-173 http://www.nrcresearchpress.com/doi/pdf/10.1139/z02-173 |
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crcansciencepubl:10.1139/z02-173 2023-12-17T10:27:56+01:00 Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea Moulton, Valerie D Richardson, W John McDonald, Trent L Elliott, Robert E Williams, Michael T 2002 http://dx.doi.org/10.1139/z02-173 http://www.nrcresearchpress.com/doi/pdf/10.1139/z02-173 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 80, issue 11, page 1900-1917 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2002 crcansciencepubl https://doi.org/10.1139/z02-173 2023-11-19T13:39:29Z This study investigates how the local abundance of ringed seals (Phoca hispida) on landfast ice of the central Alaskan Beaufort Sea is related to habitat factors and how the haulout behaviour of seals is influenced by temporal and weather factors. An understanding of these relationships is required before the potential impacts of industrial activity on ringed seals can be assessed. Intensive and replicated aerial surveys employing strip transect methodology were conducted during the springs of 19971999. Data were examined with χ 2 tests and Poisson regression. The overall observed densities of ringed seals over water depths >3 m was 0.43, 0.39, and 0.63 seals/km 2 in 19971999, respectively. Significantly more seals occurred over intermediate water depths, especially 1020 m. In all years, seals were widely distributed on the landfast ice, but during breakup, higher numbers of seals occurred near the ice edge. Densities were significantly lower in areas with high ice deformation and extensive melt water. There was no consistent relationship between seal sightings and time of day within the 10:0018:00 period with surveys. The peak period of haulout occurred around 1 and 2 June. Significantly more ringed seals were observed on warm, cloudy days. There was no indication that limited winter industrial activity, including ice roads and Vibroseis, occurring within the study area in 19971999 significantly affected ringed seal density in spring. Article in Journal/Newspaper Beaufort Sea Phoca hispida ringed seal Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 80 11 1900 1917 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Moulton, Valerie D Richardson, W John McDonald, Trent L Elliott, Robert E Williams, Michael T Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
This study investigates how the local abundance of ringed seals (Phoca hispida) on landfast ice of the central Alaskan Beaufort Sea is related to habitat factors and how the haulout behaviour of seals is influenced by temporal and weather factors. An understanding of these relationships is required before the potential impacts of industrial activity on ringed seals can be assessed. Intensive and replicated aerial surveys employing strip transect methodology were conducted during the springs of 19971999. Data were examined with χ 2 tests and Poisson regression. The overall observed densities of ringed seals over water depths >3 m was 0.43, 0.39, and 0.63 seals/km 2 in 19971999, respectively. Significantly more seals occurred over intermediate water depths, especially 1020 m. In all years, seals were widely distributed on the landfast ice, but during breakup, higher numbers of seals occurred near the ice edge. Densities were significantly lower in areas with high ice deformation and extensive melt water. There was no consistent relationship between seal sightings and time of day within the 10:0018:00 period with surveys. The peak period of haulout occurred around 1 and 2 June. Significantly more ringed seals were observed on warm, cloudy days. There was no indication that limited winter industrial activity, including ice roads and Vibroseis, occurring within the study area in 19971999 significantly affected ringed seal density in spring. |
format |
Article in Journal/Newspaper |
author |
Moulton, Valerie D Richardson, W John McDonald, Trent L Elliott, Robert E Williams, Michael T |
author_facet |
Moulton, Valerie D Richardson, W John McDonald, Trent L Elliott, Robert E Williams, Michael T |
author_sort |
Moulton, Valerie D |
title |
Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea |
title_short |
Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea |
title_full |
Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea |
title_fullStr |
Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea |
title_full_unstemmed |
Factors influencing local abundance and haulout behaviour of ringed seals ( Phoca hispida ) on landfast ice of the Alaskan Beaufort Sea |
title_sort |
factors influencing local abundance and haulout behaviour of ringed seals ( phoca hispida ) on landfast ice of the alaskan beaufort sea |
publisher |
Canadian Science Publishing |
publishDate |
2002 |
url |
http://dx.doi.org/10.1139/z02-173 http://www.nrcresearchpress.com/doi/pdf/10.1139/z02-173 |
genre |
Beaufort Sea Phoca hispida ringed seal |
genre_facet |
Beaufort Sea Phoca hispida ringed seal |
op_source |
Canadian Journal of Zoology volume 80, issue 11, page 1900-1917 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z02-173 |
container_title |
Canadian Journal of Zoology |
container_volume |
80 |
container_issue |
11 |
container_start_page |
1900 |
op_container_end_page |
1917 |
_version_ |
1785579901856776192 |