A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89
A total of 176 sightings of 488 gray whales (Eschrichtius robustus) were made during 85.6 hours of aerial surveys in the southern Chukchi Sea and northern Bering Sea, east of the International Date Line, from August to early November 1980-1989. Surveys were flown infrequently and effort varied consi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.497.4755 2023-05-15T15:43:26+02:00 A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89 Janet T. Clarke Sue E. Moore The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.4755 http://www.afsc.noaa.gov/nmml/PDF/graynote.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.4755 http://www.afsc.noaa.gov/nmml/PDF/graynote.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.afsc.noaa.gov/nmml/PDF/graynote.pdf text ftciteseerx 2016-01-08T08:51:17Z A total of 176 sightings of 488 gray whales (Eschrichtius robustus) were made during 85.6 hours of aerial surveys in the southern Chukchi Sea and northern Bering Sea, east of the International Date Line, from August to early November 1980-1989. Surveys were flown infrequently and effort varied considerably between years and geographic areas. Gray whales were sighted in all areas where surveys were flown, with the exceptions of Kotzebue Sound and Norton Sound. Abundance indices of whales per unit effort (WPUE) in the northern Bering Sea were higher than those in the southern Chukchi Sea during every month except September, when survey coverage was inadequate for abundance calculations, indicating comparatively higher overall use of that area or suggesting the onset of the southbound migration. Most gray whales were feeding (57%, n = 276). Incidental sightings of gray whales observed in and near the study area by other researchers were reviewed to better assess gray whale activity and migration patterns. Text Bering Sea Chukchi Chukchi Sea Unknown Bering Sea Chukchi Sea Norton Sound ENVELOPE(69.507,69.507,-49.202,-49.202) |
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Open Polar |
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Unknown |
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ftciteseerx |
language |
English |
description |
A total of 176 sightings of 488 gray whales (Eschrichtius robustus) were made during 85.6 hours of aerial surveys in the southern Chukchi Sea and northern Bering Sea, east of the International Date Line, from August to early November 1980-1989. Surveys were flown infrequently and effort varied considerably between years and geographic areas. Gray whales were sighted in all areas where surveys were flown, with the exceptions of Kotzebue Sound and Norton Sound. Abundance indices of whales per unit effort (WPUE) in the northern Bering Sea were higher than those in the southern Chukchi Sea during every month except September, when survey coverage was inadequate for abundance calculations, indicating comparatively higher overall use of that area or suggesting the onset of the southbound migration. Most gray whales were feeding (57%, n = 276). Incidental sightings of gray whales observed in and near the study area by other researchers were reviewed to better assess gray whale activity and migration patterns. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Janet T. Clarke Sue E. Moore |
spellingShingle |
Janet T. Clarke Sue E. Moore A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89 |
author_facet |
Janet T. Clarke Sue E. Moore |
author_sort |
Janet T. Clarke |
title |
A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89 |
title_short |
A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89 |
title_full |
A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89 |
title_fullStr |
A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89 |
title_full_unstemmed |
A note on observations of gray whales in the southern Chukchi and northern Bering Seas, August-November, 1980-89 |
title_sort |
note on observations of gray whales in the southern chukchi and northern bering seas, august-november, 1980-89 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.4755 http://www.afsc.noaa.gov/nmml/PDF/graynote.pdf |
long_lat |
ENVELOPE(69.507,69.507,-49.202,-49.202) |
geographic |
Bering Sea Chukchi Sea Norton Sound |
geographic_facet |
Bering Sea Chukchi Sea Norton Sound |
genre |
Bering Sea Chukchi Chukchi Sea |
genre_facet |
Bering Sea Chukchi Chukchi Sea |
op_source |
http://www.afsc.noaa.gov/nmml/PDF/graynote.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.497.4755 http://www.afsc.noaa.gov/nmml/PDF/graynote.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766377565489987584 |