ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983
A bstract Bowhead whale ( Balaena mysticetus ) census data obtained during the northward spring migration are summarized for 1978–1983. Population size estimates are derived from counts made by observers standing on the seaward edge of shorefast ice in the vicinity of Point Barrow, Alaska, from mid‐...
Published in: | Marine Mammal Science |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
1989
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1111/j.1748-7692.1989.tb00327.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1989.tb00327.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1989.tb00327.x |
id |
crwiley:10.1111/j.1748-7692.1989.tb00327.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1111/j.1748-7692.1989.tb00327.x 2023-12-03T10:19:54+01:00 ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983 Krogman, Bruce Rugh, David Sonntag, Ronald Zeh, Judith Ko, Daijin 1989 http://dx.doi.org/10.1111/j.1748-7692.1989.tb00327.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1989.tb00327.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1989.tb00327.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Marine Mammal Science volume 5, issue 2, page 116-138 ISSN 0824-0469 1748-7692 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 1989 crwiley https://doi.org/10.1111/j.1748-7692.1989.tb00327.x 2023-11-09T14:32:16Z A bstract Bowhead whale ( Balaena mysticetus ) census data obtained during the northward spring migration are summarized for 1978–1983. Population size estimates are derived from counts made by observers standing on the seaward edge of shorefast ice in the vicinity of Point Barrow, Alaska, from mid‐April to early June. The research design utilized two counting stations: South Perch, the primary counting station, and North Perch, used to determine the number of whales missed by South Perch observers. The percentage missed is estimated for each visibility category and used here to correct the census counts. Each season's population estimate is calculated as the sum of the number of trials of several independent multinomial distributions representing different visibility conditions. Corrections are applied for unwatched hours and hours with inferior visibility. A mean estimate of the number of whales passing within view of the census station was computed as 3,674 ± 299. This estimate was based on data collected in 1978, 1981, 1982, and 1983, years with the least apparent biases. Aerial survey data provide estimates of the proportion of whales passing at various distances seaward of the census sites as follows: 0.58 from the ice edge to 2 km, 0.76 to 3 km, and 0.80 to 4 km. Correcting for whales too far offshore to be seen by the ice‐based observers results in a population estimate of over 4,200 bowheads. Article in Journal/Newspaper Balaena mysticetus Barrow bowhead whale Point Barrow Alaska Wiley Online Library (via Crossref) Marine Mammal Science 5 2 116 138 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Krogman, Bruce Rugh, David Sonntag, Ronald Zeh, Judith Ko, Daijin ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983 |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
A bstract Bowhead whale ( Balaena mysticetus ) census data obtained during the northward spring migration are summarized for 1978–1983. Population size estimates are derived from counts made by observers standing on the seaward edge of shorefast ice in the vicinity of Point Barrow, Alaska, from mid‐April to early June. The research design utilized two counting stations: South Perch, the primary counting station, and North Perch, used to determine the number of whales missed by South Perch observers. The percentage missed is estimated for each visibility category and used here to correct the census counts. Each season's population estimate is calculated as the sum of the number of trials of several independent multinomial distributions representing different visibility conditions. Corrections are applied for unwatched hours and hours with inferior visibility. A mean estimate of the number of whales passing within view of the census station was computed as 3,674 ± 299. This estimate was based on data collected in 1978, 1981, 1982, and 1983, years with the least apparent biases. Aerial survey data provide estimates of the proportion of whales passing at various distances seaward of the census sites as follows: 0.58 from the ice edge to 2 km, 0.76 to 3 km, and 0.80 to 4 km. Correcting for whales too far offshore to be seen by the ice‐based observers results in a population estimate of over 4,200 bowheads. |
format |
Article in Journal/Newspaper |
author |
Krogman, Bruce Rugh, David Sonntag, Ronald Zeh, Judith Ko, Daijin |
author_facet |
Krogman, Bruce Rugh, David Sonntag, Ronald Zeh, Judith Ko, Daijin |
author_sort |
Krogman, Bruce |
title |
ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983 |
title_short |
ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983 |
title_full |
ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983 |
title_fullStr |
ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983 |
title_full_unstemmed |
ICE‐BASED CENSUS OF BOWHEAD WHALES MIGRATING PAST POINT BARROW, ALASKA, 1978‐1983 |
title_sort |
ice‐based census of bowhead whales migrating past point barrow, alaska, 1978‐1983 |
publisher |
Wiley |
publishDate |
1989 |
url |
http://dx.doi.org/10.1111/j.1748-7692.1989.tb00327.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1748-7692.1989.tb00327.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1748-7692.1989.tb00327.x |
genre |
Balaena mysticetus Barrow bowhead whale Point Barrow Alaska |
genre_facet |
Balaena mysticetus Barrow bowhead whale Point Barrow Alaska |
op_source |
Marine Mammal Science volume 5, issue 2, page 116-138 ISSN 0824-0469 1748-7692 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1748-7692.1989.tb00327.x |
container_title |
Marine Mammal Science |
container_volume |
5 |
container_issue |
2 |
container_start_page |
116 |
op_container_end_page |
138 |
_version_ |
1784267310313242624 |