Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019
Successful reproduction is essential to a species existence. Here we summarize Bering–Chukchi–Beaufort (BCB) bowhead whale (Balaena mysticetus Linnaeus, 1758) calf distribution, ratio of calf to adult sightings, and encounter rate from data collected during line–transect aerial surveys conducted fro...
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Online Access: | http://dx.doi.org/10.1139/as-2021-0020 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2021-0020 https://cdnsciencepub.com/doi/pdf/10.1139/as-2021-0020 |
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crcansciencepubl:10.1139/as-2021-0020 2024-04-28T07:54:37+00:00 Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019 Clarke, J.T. Ferguson, M.C. Okkonen, S.R. Brower, A.A. Willoughby, A.L. 2022 http://dx.doi.org/10.1139/as-2021-0020 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2021-0020 https://cdnsciencepub.com/doi/pdf/10.1139/as-2021-0020 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Arctic Science volume 8, issue 2, page 531-548 ISSN 2368-7460 2368-7460 General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science journal-article 2022 crcansciencepubl https://doi.org/10.1139/as-2021-0020 2024-04-09T06:56:25Z Successful reproduction is essential to a species existence. Here we summarize Bering–Chukchi–Beaufort (BCB) bowhead whale (Balaena mysticetus Linnaeus, 1758) calf distribution, ratio of calf to adult sightings, and encounter rate from data collected during line–transect aerial surveys conducted from July to October 2012–2019 in the western Beaufort Sea (140°W–157°W). During 223,000 on effort km, a total of 274 calves were seen: 100 in summer (July–August) and 174 in fall (September–October), compared with nearly 3,200 non-calves. Calves were widely distributed in the study area in August and September, with distribution in July largely east of 150°W and distribution in October west of 143°W. Calf ratios and encounter rates appear to follow a 3–4 year cycle. Most calves (240/274; 88%) were seen near an adult assumed to be the maternal female, but 9% (26/274) of all calves were observed unaccompanied at the surface and 3% (8/274) were observed with large whales at the surface but not close by. Of the total calves detected, 60% (165/274) were observed after circling was initiated, highlighting the importance of closely investigating all bowhead whale sightings if identification of calves is critical to project goals. Bowhead whale calf data from the eastern Beaufort Sea and Amundsen Gulf in August 2019 are also summarized. Article in Journal/Newspaper Amundsen Gulf Arctic Balaena mysticetus Beaufort Sea bowhead whale Chukchi Canadian Science Publishing Arctic Science |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
topic |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
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General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science Clarke, J.T. Ferguson, M.C. Okkonen, S.R. Brower, A.A. Willoughby, A.L. Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019 |
topic_facet |
General Earth and Planetary Sciences General Agricultural and Biological Sciences General Environmental Science |
description |
Successful reproduction is essential to a species existence. Here we summarize Bering–Chukchi–Beaufort (BCB) bowhead whale (Balaena mysticetus Linnaeus, 1758) calf distribution, ratio of calf to adult sightings, and encounter rate from data collected during line–transect aerial surveys conducted from July to October 2012–2019 in the western Beaufort Sea (140°W–157°W). During 223,000 on effort km, a total of 274 calves were seen: 100 in summer (July–August) and 174 in fall (September–October), compared with nearly 3,200 non-calves. Calves were widely distributed in the study area in August and September, with distribution in July largely east of 150°W and distribution in October west of 143°W. Calf ratios and encounter rates appear to follow a 3–4 year cycle. Most calves (240/274; 88%) were seen near an adult assumed to be the maternal female, but 9% (26/274) of all calves were observed unaccompanied at the surface and 3% (8/274) were observed with large whales at the surface but not close by. Of the total calves detected, 60% (165/274) were observed after circling was initiated, highlighting the importance of closely investigating all bowhead whale sightings if identification of calves is critical to project goals. Bowhead whale calf data from the eastern Beaufort Sea and Amundsen Gulf in August 2019 are also summarized. |
format |
Article in Journal/Newspaper |
author |
Clarke, J.T. Ferguson, M.C. Okkonen, S.R. Brower, A.A. Willoughby, A.L. |
author_facet |
Clarke, J.T. Ferguson, M.C. Okkonen, S.R. Brower, A.A. Willoughby, A.L. |
author_sort |
Clarke, J.T. |
title |
Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019 |
title_short |
Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019 |
title_full |
Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019 |
title_fullStr |
Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019 |
title_full_unstemmed |
Bowhead whale calf detections in the western Beaufort sea during the open water season, 2012–2019 |
title_sort |
bowhead whale calf detections in the western beaufort sea during the open water season, 2012–2019 |
publisher |
Canadian Science Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1139/as-2021-0020 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2021-0020 https://cdnsciencepub.com/doi/pdf/10.1139/as-2021-0020 |
genre |
Amundsen Gulf Arctic Balaena mysticetus Beaufort Sea bowhead whale Chukchi |
genre_facet |
Amundsen Gulf Arctic Balaena mysticetus Beaufort Sea bowhead whale Chukchi |
op_source |
Arctic Science volume 8, issue 2, page 531-548 ISSN 2368-7460 2368-7460 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/as-2021-0020 |
container_title |
Arctic Science |
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1797576375120429056 |