2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock
ABSTRACT. Beluga whales of the eastern Beaufort Sea stock were tagged with satellite-linked time-depth recorders and tracked during summer and autumn in 1993, 1995, and 1997. Whales occupied the Mackenzie estuary intermittently and for only a few days at a time. They spent much of their time offshor...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.517.8033 2023-05-15T13:22:51+02:00 2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock P. R. Richard The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.8033 http://pubs.aina.ucalgary.ca/arctic/Arctic54-3-223.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.8033 http://pubs.aina.ucalgary.ca/arctic/Arctic54-3-223.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/arctic/Arctic54-3-223.pdf text ftciteseerx 2016-01-08T09:57:04Z ABSTRACT. Beluga whales of the eastern Beaufort Sea stock were tagged with satellite-linked time-depth recorders and tracked during summer and autumn in 1993, 1995, and 1997. Whales occupied the Mackenzie estuary intermittently and for only a few days at a time. They spent much of their time offshore, near or beyond the shelf break and in the polar pack ice of the estuary, or in Amundsen Gulf, M’Clure Strait, and Viscount Melville Sound. The movements of tagged belugas into the polar pack and into passages of the Canadian Arctic Archipelago suggest that aerial surveys conducted in the southeastern Beaufort Sea and Amundsen Gulf may have substantially underestimated the size of the eastern Beaufort Sea stock. Ranges of male and female belugas were somewhat segregated in two of the three years of study. In late July of 1993 and 1995, most males were located in Viscount Melville Sound, while females were primarily in Amundsen Gulf. Movement patterns of males tagged in late July in 1997 were different from those of males tagged in early July in 1993 and 1995. In September, belugas migrated westward along the continental shelf and farther offshore in the Alaskan Beaufort Sea. The tracks from 1997 show that the western Chukchi Sea is an autumn migratory destination and that at least some belugas continued their migration south towards the Bering Strait in November. Some conclusions from this study about beluga ecology challenge conventional wisdom, in that estuarine occupation appears to be short-lived, belugas travel long distances in summer to areas hundreds of kilometres from the Mackenzie Delta, and they do not avoid dense pack ice in summer and autumn. Key words: beluga, Delphinapterus leucas, Beaufort Sea, Chukchi Sea, satellite-linked tracking, autumn migration, survey biases Text Amundsen Gulf Arctic Arctic Archipelago Arctic Beaufort Sea Beluga Beluga* Bering Strait Canadian Arctic Archipelago Chukchi Chukchi Sea Delphinapterus leucas Mackenzie Delta Viscount Melville Sound Unknown Arctic Bering Strait Canadian Arctic Archipelago Chukchi Sea Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Melville Sound ENVELOPE(-107.002,-107.002,68.168,68.168) Viscount Melville Sound ENVELOPE(-109.836,-109.836,74.046,74.046) |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
ABSTRACT. Beluga whales of the eastern Beaufort Sea stock were tagged with satellite-linked time-depth recorders and tracked during summer and autumn in 1993, 1995, and 1997. Whales occupied the Mackenzie estuary intermittently and for only a few days at a time. They spent much of their time offshore, near or beyond the shelf break and in the polar pack ice of the estuary, or in Amundsen Gulf, M’Clure Strait, and Viscount Melville Sound. The movements of tagged belugas into the polar pack and into passages of the Canadian Arctic Archipelago suggest that aerial surveys conducted in the southeastern Beaufort Sea and Amundsen Gulf may have substantially underestimated the size of the eastern Beaufort Sea stock. Ranges of male and female belugas were somewhat segregated in two of the three years of study. In late July of 1993 and 1995, most males were located in Viscount Melville Sound, while females were primarily in Amundsen Gulf. Movement patterns of males tagged in late July in 1997 were different from those of males tagged in early July in 1993 and 1995. In September, belugas migrated westward along the continental shelf and farther offshore in the Alaskan Beaufort Sea. The tracks from 1997 show that the western Chukchi Sea is an autumn migratory destination and that at least some belugas continued their migration south towards the Bering Strait in November. Some conclusions from this study about beluga ecology challenge conventional wisdom, in that estuarine occupation appears to be short-lived, belugas travel long distances in summer to areas hundreds of kilometres from the Mackenzie Delta, and they do not avoid dense pack ice in summer and autumn. Key words: beluga, Delphinapterus leucas, Beaufort Sea, Chukchi Sea, satellite-linked tracking, autumn migration, survey biases |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
P. R. Richard |
spellingShingle |
P. R. Richard 2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock |
author_facet |
P. R. Richard |
author_sort |
P. R. Richard |
title |
2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock |
title_short |
2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock |
title_full |
2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock |
title_fullStr |
2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock |
title_full_unstemmed |
2001b. Summer and autumn movements of belugas of the eastern Beaufort Sea stock |
title_sort |
2001b. summer and autumn movements of belugas of the eastern beaufort sea stock |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.8033 http://pubs.aina.ucalgary.ca/arctic/Arctic54-3-223.pdf |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-107.002,-107.002,68.168,68.168) ENVELOPE(-109.836,-109.836,74.046,74.046) |
geographic |
Arctic Bering Strait Canadian Arctic Archipelago Chukchi Sea Mackenzie Delta Melville Sound Viscount Melville Sound |
geographic_facet |
Arctic Bering Strait Canadian Arctic Archipelago Chukchi Sea Mackenzie Delta Melville Sound Viscount Melville Sound |
genre |
Amundsen Gulf Arctic Arctic Archipelago Arctic Beaufort Sea Beluga Beluga* Bering Strait Canadian Arctic Archipelago Chukchi Chukchi Sea Delphinapterus leucas Mackenzie Delta Viscount Melville Sound |
genre_facet |
Amundsen Gulf Arctic Arctic Archipelago Arctic Beaufort Sea Beluga Beluga* Bering Strait Canadian Arctic Archipelago Chukchi Chukchi Sea Delphinapterus leucas Mackenzie Delta Viscount Melville Sound |
op_source |
http://pubs.aina.ucalgary.ca/arctic/Arctic54-3-223.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.517.8033 http://pubs.aina.ucalgary.ca/arctic/Arctic54-3-223.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766367427589832704 |