Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea
Subsistence harvest in Arctic marine ecosystems is influenced by sea ice conditions affecting species distributions, abundance, and accessibility. We tracked 78 polar bears ( Ursus maritimus Phipps, 1774) of different age, sex, and reproductive classes via satellite telemetry in the Canadian Beaufor...
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Canadian Science Publishing
2023
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crcansciencepubl:10.1139/as-2023-0003 2023-12-17T10:22:41+01:00 Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea Hamilton, Stephen G. Henderson, Erin M. Derocher, Andrew E. 2023 http://dx.doi.org/10.1139/as-2023-0003 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2023-0003 https://cdnsciencepub.com/doi/pdf/10.1139/as-2023-0003 en eng Canadian Science Publishing https://creativecommons.org/licenses/by/4.0/deed.en_GB Arctic Science ISSN 2368-7460 General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science journal-article 2023 crcansciencepubl https://doi.org/10.1139/as-2023-0003 2023-11-19T13:38:18Z Subsistence harvest in Arctic marine ecosystems is influenced by sea ice conditions affecting species distributions, abundance, and accessibility. We tracked 78 polar bears ( Ursus maritimus Phipps, 1774) of different age, sex, and reproductive classes via satellite telemetry in the Canadian Beaufort Sea (2007–2014, n = 71 258). We assessed vulnerability to harvest (no/low/medium/high) based on telemetry data overlap with density of historical harvest locations (1985–1987, n = 121). All classes of polar bears were detected in historical harvest areas of low to high risk in greater proportion than expected from available area during the harvest period (January to ice breakup), and all but solitary adult females had >50% of locations in the risk areas. Subadult males were proportionally more often inside risk areas yet were not observed in the high-risk areas. Other classes were observed <1% of the time in high-risk areas yet still proportionally greater than expected from available area. Landfast ice has declined in the pre-melt (January–March) and end-of-harvest (June–July) seasons (1980–2021), with the rate of decline being greater in lower-risk areas ( p ≤ 0.05). With sea ice predicted to decline in the future, we suggest that polar bears in the Beaufort Sea may become more concentrated into areas of higher harvest risk. Article in Journal/Newspaper Arctic Arctic Beaufort Sea Sea ice Ursus maritimus Canadian Science Publishing (via Crossref) Arctic Arctic Science |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
spellingShingle |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science Hamilton, Stephen G. Henderson, Erin M. Derocher, Andrew E. Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea |
topic_facet |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
description |
Subsistence harvest in Arctic marine ecosystems is influenced by sea ice conditions affecting species distributions, abundance, and accessibility. We tracked 78 polar bears ( Ursus maritimus Phipps, 1774) of different age, sex, and reproductive classes via satellite telemetry in the Canadian Beaufort Sea (2007–2014, n = 71 258). We assessed vulnerability to harvest (no/low/medium/high) based on telemetry data overlap with density of historical harvest locations (1985–1987, n = 121). All classes of polar bears were detected in historical harvest areas of low to high risk in greater proportion than expected from available area during the harvest period (January to ice breakup), and all but solitary adult females had >50% of locations in the risk areas. Subadult males were proportionally more often inside risk areas yet were not observed in the high-risk areas. Other classes were observed <1% of the time in high-risk areas yet still proportionally greater than expected from available area. Landfast ice has declined in the pre-melt (January–March) and end-of-harvest (June–July) seasons (1980–2021), with the rate of decline being greater in lower-risk areas ( p ≤ 0.05). With sea ice predicted to decline in the future, we suggest that polar bears in the Beaufort Sea may become more concentrated into areas of higher harvest risk. |
format |
Article in Journal/Newspaper |
author |
Hamilton, Stephen G. Henderson, Erin M. Derocher, Andrew E. |
author_facet |
Hamilton, Stephen G. Henderson, Erin M. Derocher, Andrew E. |
author_sort |
Hamilton, Stephen G. |
title |
Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea |
title_short |
Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea |
title_full |
Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea |
title_fullStr |
Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea |
title_full_unstemmed |
Spatial and temporal harvest risk to polar bears in the Canadian Beaufort Sea |
title_sort |
spatial and temporal harvest risk to polar bears in the canadian beaufort sea |
publisher |
Canadian Science Publishing |
publishDate |
2023 |
url |
http://dx.doi.org/10.1139/as-2023-0003 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2023-0003 https://cdnsciencepub.com/doi/pdf/10.1139/as-2023-0003 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Beaufort Sea Sea ice Ursus maritimus |
genre_facet |
Arctic Arctic Beaufort Sea Sea ice Ursus maritimus |
op_source |
Arctic Science ISSN 2368-7460 |
op_rights |
https://creativecommons.org/licenses/by/4.0/deed.en_GB |
op_doi |
https://doi.org/10.1139/as-2023-0003 |
container_title |
Arctic Science |
_version_ |
1785551309373440000 |