www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands
Large whales were extensively hunted in coastal waters off Alaska, but current distribution, population sizes and trends are poorly known. Line transect surveys were conducted in coastal waters of the Aleutian Islands and the Alaska Peninsula in the summer of 2001–2003. Abundances of three species w...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.154.2027 2023-05-15T15:36:40+02:00 www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands Re N. Zerbini A Janice M. Waite B Jeffrey L. Laake B Paul R. Wade B The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.154.2027 http://www.fakr.noaa.gov/protectedresources/whales/publications/abundancealeutians.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.154.2027 http://www.fakr.noaa.gov/protectedresources/whales/publications/abundancealeutians.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.fakr.noaa.gov/protectedresources/whales/publications/abundancealeutians.pdf text 2006 ftciteseerx 2016-01-07T15:27:07Z Large whales were extensively hunted in coastal waters off Alaska, but current distribution, population sizes and trends are poorly known. Line transect surveys were conducted in coastal waters of the Aleutian Islands and the Alaska Peninsula in the summer of 2001–2003. Abundances of three species were estimated by conventional and multiple covariate distance sampling (MCDS) methods. Time series of abundance estimates were used to derive rates of increase for fin whales (Balaenoptera physalus) and humpback whales (Megaptera novaeangliae). Fin whales occurred primarily from the Kenai Peninsula to the Shumagin Islands, but were abundant only near the Semidi Islands and Kodiak. Humpback whales were found from the Kenai Peninsula to Umnak Island and were more abundant near Kodiak, the Shumagin Islands and north of Unimak Pass. Minke whales (B. acutorostrata) occurred primarily in the Aleutian Islands, with a few sightings south of the Alaska Peninsula and near Kodiak Island. Humpback whales were observed in large numbers in their former whaling grounds. In contrast, high densities of fin whales were not observed around the eastern Aleutian Islands, where whaling occurred. Average abundance estimates (95 % CI) for fin, humpback and minke whales were 1652 (1142–2389), 2644 (1899–3680), and 1233 (656–2315), respectively. Annual rates of increase were estimated at 4.8 % (95 % CI 4.1–5.4%) for fin and 6.6 % (5.2–8.6%) for humpback whales. This study provides the first estimate of the rate of increase of fin whales in the North Pacific Ocean. The estimated trends are consistent with those of other recovering baleen whales. There were no Text Balaenoptera physalus baleen whales Kodiak Megaptera novaeangliae Alaska Aleutian Islands Unknown Pacific |
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Large whales were extensively hunted in coastal waters off Alaska, but current distribution, population sizes and trends are poorly known. Line transect surveys were conducted in coastal waters of the Aleutian Islands and the Alaska Peninsula in the summer of 2001–2003. Abundances of three species were estimated by conventional and multiple covariate distance sampling (MCDS) methods. Time series of abundance estimates were used to derive rates of increase for fin whales (Balaenoptera physalus) and humpback whales (Megaptera novaeangliae). Fin whales occurred primarily from the Kenai Peninsula to the Shumagin Islands, but were abundant only near the Semidi Islands and Kodiak. Humpback whales were found from the Kenai Peninsula to Umnak Island and were more abundant near Kodiak, the Shumagin Islands and north of Unimak Pass. Minke whales (B. acutorostrata) occurred primarily in the Aleutian Islands, with a few sightings south of the Alaska Peninsula and near Kodiak Island. Humpback whales were observed in large numbers in their former whaling grounds. In contrast, high densities of fin whales were not observed around the eastern Aleutian Islands, where whaling occurred. Average abundance estimates (95 % CI) for fin, humpback and minke whales were 1652 (1142–2389), 2644 (1899–3680), and 1233 (656–2315), respectively. Annual rates of increase were estimated at 4.8 % (95 % CI 4.1–5.4%) for fin and 6.6 % (5.2–8.6%) for humpback whales. This study provides the first estimate of the rate of increase of fin whales in the North Pacific Ocean. The estimated trends are consistent with those of other recovering baleen whales. There were no |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Re N. Zerbini A Janice M. Waite B Jeffrey L. Laake B Paul R. Wade B |
spellingShingle |
Re N. Zerbini A Janice M. Waite B Jeffrey L. Laake B Paul R. Wade B www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands |
author_facet |
Re N. Zerbini A Janice M. Waite B Jeffrey L. Laake B Paul R. Wade B |
author_sort |
Re N. Zerbini A |
title |
www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands |
title_short |
www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands |
title_full |
www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands |
title_fullStr |
www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands |
title_full_unstemmed |
www.elsevier.com/locate/dsr Abundance, trends and distribution of baleen whales off Western Alaska and the central Aleutian Islands |
title_sort |
www.elsevier.com/locate/dsr abundance, trends and distribution of baleen whales off western alaska and the central aleutian islands |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.154.2027 http://www.fakr.noaa.gov/protectedresources/whales/publications/abundancealeutians.pdf |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Balaenoptera physalus baleen whales Kodiak Megaptera novaeangliae Alaska Aleutian Islands |
genre_facet |
Balaenoptera physalus baleen whales Kodiak Megaptera novaeangliae Alaska Aleutian Islands |
op_source |
http://www.fakr.noaa.gov/protectedresources/whales/publications/abundancealeutians.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.154.2027 http://www.fakr.noaa.gov/protectedresources/whales/publications/abundancealeutians.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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