Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas
A total of 1112 Polar Bears (Ursus maritimus) at 482 sightings were recorded during aerial surveys in the Beaufort, Chukchi, and northern Bering Seas conducted primarily during September and October from 1979-1999. Of these bears, 784 were observed offshore at 400 sightings. The surveys were conduct...
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The Ottawa Field-Naturalists' Club
2004
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Online Access: | https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/12 https://doi.org/10.22621/cfn.v118i3.12 |
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ftjcfn:oai:canadianfieldnaturalist.ca:article/12 2023-05-15T15:35:59+02:00 Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas Hansen, Donald J. 2004-07-01 application/pdf https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/12 https://doi.org/10.22621/cfn.v118i3.12 eng eng The Ottawa Field-Naturalists' Club https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/12/11 https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/12 doi:10.22621/cfn.v118i3.12 The Canadian Field-Naturalist; Vol. 118 No. 3 (2004); 395-399 0008-3550 Polar Bear Ursus maritimus habitat Beaufort Sea Chukchi Sea Northern Bering Sea Alaska info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2004 ftjcfn https://doi.org/10.22621/cfn.v118i3.12 2021-09-02T18:53:36Z A total of 1112 Polar Bears (Ursus maritimus) at 482 sightings were recorded during aerial surveys in the Beaufort, Chukchi, and northern Bering Seas conducted primarily during September and October from 1979-1999. Of these bears, 784 were observed offshore at 400 sightings. The surveys were conducted by the Naval Ocean Systems Center and Minerals Management Service; they were designed to monitor the fall Bowhead Whale (Balaena mysticetus) migration. Over the 20-year period, 1,096,620 kilometers of surveys were flown. The majority of the offshore Polar Bears, 595 bears at 290 sightings, and most of the kill sites and polar bear tracks were recorded in 80-100% ice cover. The number of bears per kilometer increased substantially in >24% ice cover, with the highest number observed in 80-100% ice cover. This habitat use probably is related to the availability of seals, their primary prey. There were 328 bears (83 sightings) recorded on land, and most of them were associated with whale carcasses and bowhead whale subsistence harvest sites along the Alaskan Beaufort Sea coast. Article in Journal/Newspaper Balaena mysticetus Beaufort Sea Bering Sea bowhead whale Chukchi Chukchi Sea Ursus maritimus Alaska The Canadian Field-Naturalist (E-Journal) Bering Sea Chukchi Sea The Canadian Field-Naturalist 118 3 395 |
institution |
Open Polar |
collection |
The Canadian Field-Naturalist (E-Journal) |
op_collection_id |
ftjcfn |
language |
English |
topic |
Polar Bear Ursus maritimus habitat Beaufort Sea Chukchi Sea Northern Bering Sea Alaska |
spellingShingle |
Polar Bear Ursus maritimus habitat Beaufort Sea Chukchi Sea Northern Bering Sea Alaska Hansen, Donald J. Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas |
topic_facet |
Polar Bear Ursus maritimus habitat Beaufort Sea Chukchi Sea Northern Bering Sea Alaska |
description |
A total of 1112 Polar Bears (Ursus maritimus) at 482 sightings were recorded during aerial surveys in the Beaufort, Chukchi, and northern Bering Seas conducted primarily during September and October from 1979-1999. Of these bears, 784 were observed offshore at 400 sightings. The surveys were conducted by the Naval Ocean Systems Center and Minerals Management Service; they were designed to monitor the fall Bowhead Whale (Balaena mysticetus) migration. Over the 20-year period, 1,096,620 kilometers of surveys were flown. The majority of the offshore Polar Bears, 595 bears at 290 sightings, and most of the kill sites and polar bear tracks were recorded in 80-100% ice cover. The number of bears per kilometer increased substantially in >24% ice cover, with the highest number observed in 80-100% ice cover. This habitat use probably is related to the availability of seals, their primary prey. There were 328 bears (83 sightings) recorded on land, and most of them were associated with whale carcasses and bowhead whale subsistence harvest sites along the Alaskan Beaufort Sea coast. |
format |
Article in Journal/Newspaper |
author |
Hansen, Donald J. |
author_facet |
Hansen, Donald J. |
author_sort |
Hansen, Donald J. |
title |
Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas |
title_short |
Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas |
title_full |
Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas |
title_fullStr |
Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas |
title_full_unstemmed |
Observations of Habitat Use by Polar Bears, Ursus maritimus, in the Alaskan Beaufort, Chukchi, and Northern Bering Seas |
title_sort |
observations of habitat use by polar bears, ursus maritimus, in the alaskan beaufort, chukchi, and northern bering seas |
publisher |
The Ottawa Field-Naturalists' Club |
publishDate |
2004 |
url |
https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/12 https://doi.org/10.22621/cfn.v118i3.12 |
geographic |
Bering Sea Chukchi Sea |
geographic_facet |
Bering Sea Chukchi Sea |
genre |
Balaena mysticetus Beaufort Sea Bering Sea bowhead whale Chukchi Chukchi Sea Ursus maritimus Alaska |
genre_facet |
Balaena mysticetus Beaufort Sea Bering Sea bowhead whale Chukchi Chukchi Sea Ursus maritimus Alaska |
op_source |
The Canadian Field-Naturalist; Vol. 118 No. 3 (2004); 395-399 0008-3550 |
op_relation |
https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/12/11 https://www.canadianfieldnaturalist.ca/index.php/cfn/article/view/12 doi:10.22621/cfn.v118i3.12 |
op_doi |
https://doi.org/10.22621/cfn.v118i3.12 |
container_title |
The Canadian Field-Naturalist |
container_volume |
118 |
container_issue |
3 |
container_start_page |
395 |
_version_ |
1766366324083130368 |