HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
水産科学院・水産科学研究院  >
雑誌発表論文等  >

Distribution of the Steller sea lion Eumetopias jubatus during winter in the northern Sea of Japan, along the west coast of Hokkaido, based on aerial and land sighting surveys

フルテキスト
2006-72_p922-931.pdf6.46 MBPDF見る/開く
この文献へのリンクには次のURLを使用してください:http://hdl.handle.net/2115/35585

タイトル: Distribution of the Steller sea lion Eumetopias jubatus during winter in the northern Sea of Japan, along the west coast of Hokkaido, based on aerial and land sighting surveys
著者: Hoshino, Hiroshi 著作を一覧する
Isono, Takeomi 著作を一覧する
Takayama, Takuma 著作を一覧する
Ishinazaka, Tsuyoshi 著作を一覧する
Wada, Akihiko 著作を一覧する
Sakurai, Yasunori 著作を一覧する
キーワード: Cape Kamui
Cape Ofuyu
distribution
Eumetopias jubatus
haul-out sites
Japan Sea coast off Hokkaido
Steller sea lion
発行日: 2006年10月
出版者: The Japanese Society of Scientific Fisheries
誌名: Fisheries Science
巻: 72
号: 5
開始ページ: 922
終了ページ: 931
出版社 DOI: 10.1111/j.1444-2906.2006.01239.x
抄録: Aerial and land-based sighting surveys were conducted to clarify the distribution of Steller sea lions during winter in the northern Sea of Japan, along the west coast of Hokkaido, from 2001 to 2003. Aerial surveys revealed that sea lions gathered around the Rishiri-Rebun Islands in March 2002 and 2003, and between Iwanai and Cape Obana in February 2003. Higher numbers of sea lions were also confirmed at Cape Ofuyu and Cape Kamui on the central-west coast compared to that at the haul-out sites in the 1980s on the upper-west coast in March 2002 and 2003. Additionally, fisherman observed sea lions along the coast of the Tsugaru Strait from February to May 2003, where the presence of sea lions was not reported in the 1980s. These facts suggest that sea lions have recently expanded their distribution southward. Land-based surveys at the recent haul-out sites indicated that sea lions in the central-west coast were composed mainly of adult and subadult males (average: Cape Ofuyu 75.2%, Cape Kamui 69.5%), which stayed from November 2002 to May 2003. In this area, sea lions arrived earlier and stayed longer than in the 1980s.
Rights: ©2006 公益社団法人日本水産学会 The Japanese Society of Fisheries Science
資料タイプ: article
URI: http://hdl.handle.net/2115/35585
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 桜井 泰憲

 

本サイトに関するご意見・お問い合わせは repo at lib.hokudai.ac.jp へお願いします。 - 北海道大学