Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005
We analyzed published and archived records for the past 250 years to assess changes in distribution and abundance of Steller sea lions, Eumetopias jubatus, along the Asian coast from the Bering Strait to the Korean Peninsula. We found that the northern extent of Steller sea liondistribution has not...
Main Authors: | , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2005
|
Subjects: | |
Online Access: | http://hdl.handle.net/1834/26329 |
id |
ftoceandocs:oai:aquadocs.org:1834/26329 |
---|---|
record_format |
openpolar |
spelling |
ftoceandocs:oai:aquadocs.org:1834/26329 2023-05-15T15:44:17+02:00 Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005 Burkanov, Vladimir N. Loughlin, Thomas R. 2005 application/pdf 1-62 http://hdl.handle.net/1834/26329 en eng http://spo.nmfs.noaa.gov/mfr672/mfr6721.pdf 0090-1830 http://hdl.handle.net/1834/26329 http://aquaticcommons.org/id/eprint/9715 403 2012-08-14 16:53:31 9715 United States National Marine Fisheries Service Biology Conservation Ecology Fisheries Management article TRUE 2005 ftoceandocs 2023-04-06T17:03:09Z We analyzed published and archived records for the past 250 years to assess changes in distribution and abundance of Steller sea lions, Eumetopias jubatus, along the Asian coast from the Bering Strait to the Korean Peninsula. We found that the northern extent of Steller sea liondistribution has not changed but that the southern limit has moved north by some 500–900 km (~300–500 n.mi.) over the past 50 years. Additionally, the number of animals and their distribution has changed on the Commander Islands, Kuril Islands, and Kamchatka Peninsula. We found no changesin the number of rookeries in the northern Sea of Okhotsk, but a new rookery was established at Tuleny Island on the eastern coast of Sakhalin Island. We estimate that the total abundance of Steller sea lions along the Asian coast in the late 19th century was about 115,000 animals; during the 1960’s, the total estimate was about 27,000 (including pups), most of which were in the Kuril Islands. The fewest number of Steller sea lions occurred in the northwesternPacific in the late 1980’s–early 1990’s when only about 13,000 individuals (including pups) were estimated in the entire region. During the 1990’s, and especially in early2000, an increasing trend in abundance occurred in most areas. Present estimated abundance of Steller sea lions in Asia is about 16,000 individuals (including about 5,000 pups), about half of which occur in the Kuril Islands. Changes in abundance occurred during all time periods but varied by site and period. Specifically, over the past 150 years Steller sea lion abundance at most sites has changed. There were no rookeries on the Commander Islands between1850 and 1960 and abundance was low, but by 1977, abundance increased to 4,800 individuals and a rookery was establishedin the mid 1980’s; abundance there has declined since the early 1980’s and in 2004 only 895 individuals (including 221 pups) were counted during the breeding season. Between 1940 and 2004, abundance along the eastern coast of Kamchatka declined from ~7,000 to ~600 ... Article in Journal/Newspaper Bering Strait Kamchatka Kamchatka Peninsula Sakhalin IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications Bering Strait Kamchatka Peninsula ENVELOPE(160.000,160.000,56.000,56.000) Okhotsk |
institution |
Open Polar |
collection |
IODE-UNESCO: OceanDocs - E-Repository of Ocean Publications |
op_collection_id |
ftoceandocs |
language |
English |
topic |
Biology Conservation Ecology Fisheries Management |
spellingShingle |
Biology Conservation Ecology Fisheries Management Burkanov, Vladimir N. Loughlin, Thomas R. Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005 |
topic_facet |
Biology Conservation Ecology Fisheries Management |
description |
We analyzed published and archived records for the past 250 years to assess changes in distribution and abundance of Steller sea lions, Eumetopias jubatus, along the Asian coast from the Bering Strait to the Korean Peninsula. We found that the northern extent of Steller sea liondistribution has not changed but that the southern limit has moved north by some 500–900 km (~300–500 n.mi.) over the past 50 years. Additionally, the number of animals and their distribution has changed on the Commander Islands, Kuril Islands, and Kamchatka Peninsula. We found no changesin the number of rookeries in the northern Sea of Okhotsk, but a new rookery was established at Tuleny Island on the eastern coast of Sakhalin Island. We estimate that the total abundance of Steller sea lions along the Asian coast in the late 19th century was about 115,000 animals; during the 1960’s, the total estimate was about 27,000 (including pups), most of which were in the Kuril Islands. The fewest number of Steller sea lions occurred in the northwesternPacific in the late 1980’s–early 1990’s when only about 13,000 individuals (including pups) were estimated in the entire region. During the 1990’s, and especially in early2000, an increasing trend in abundance occurred in most areas. Present estimated abundance of Steller sea lions in Asia is about 16,000 individuals (including about 5,000 pups), about half of which occur in the Kuril Islands. Changes in abundance occurred during all time periods but varied by site and period. Specifically, over the past 150 years Steller sea lion abundance at most sites has changed. There were no rookeries on the Commander Islands between1850 and 1960 and abundance was low, but by 1977, abundance increased to 4,800 individuals and a rookery was establishedin the mid 1980’s; abundance there has declined since the early 1980’s and in 2004 only 895 individuals (including 221 pups) were counted during the breeding season. Between 1940 and 2004, abundance along the eastern coast of Kamchatka declined from ~7,000 to ~600 ... |
format |
Article in Journal/Newspaper |
author |
Burkanov, Vladimir N. Loughlin, Thomas R. |
author_facet |
Burkanov, Vladimir N. Loughlin, Thomas R. |
author_sort |
Burkanov, Vladimir N. |
title |
Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005 |
title_short |
Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005 |
title_full |
Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005 |
title_fullStr |
Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005 |
title_full_unstemmed |
Distribution and Abundance of Steller Sea Lions, Eumetopias jubatus, on the Asian Coast, 1720's-2005 |
title_sort |
distribution and abundance of steller sea lions, eumetopias jubatus, on the asian coast, 1720's-2005 |
publishDate |
2005 |
url |
http://hdl.handle.net/1834/26329 |
long_lat |
ENVELOPE(160.000,160.000,56.000,56.000) |
geographic |
Bering Strait Kamchatka Peninsula Okhotsk |
geographic_facet |
Bering Strait Kamchatka Peninsula Okhotsk |
genre |
Bering Strait Kamchatka Kamchatka Peninsula Sakhalin |
genre_facet |
Bering Strait Kamchatka Kamchatka Peninsula Sakhalin |
op_source |
http://aquaticcommons.org/id/eprint/9715 403 2012-08-14 16:53:31 9715 United States National Marine Fisheries Service |
op_relation |
http://spo.nmfs.noaa.gov/mfr672/mfr6721.pdf 0090-1830 http://hdl.handle.net/1834/26329 |
_version_ |
1766378579339247616 |