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津軽海峡におけるカマイルカの出現時期の変化

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Title: 津軽海峡におけるカマイルカの出現時期の変化
Other Titles: Seasonal change of the appearance of Pacific white-sided dolphin, Lagenorhynchus obliquidens in the Tsugaru Strait, Japan
Authors: 北村, 志乃1 Browse this author
栗原, 縁2 Browse this author
柴田, 泰宙3 Browse this author
松石, 隆4 Browse this author →KAKEN DB
Authors(alt): Kitamura, Shino1
Kurihara, Yukari2
Shibata, Yasutoki3
Matsuishi, Takashi4
Issue Date: Jun-2008
Publisher: 日本セトロジー研究会
Journal Title: 日本セトロジー研究
Journal Title(alt): Japan cetology
Volume: 18
Start Page: 13
End Page: 16
Abstract: カマイルカは春に津軽海峡に来遊し、一年のうちで4月、5月に最も多く観察される。本研究では2003年5月から2007年8月までのフェリーからの鯨類目視調査記録を分析し、津軽海峡のカマイルカの来遊時期の経年変化を検討した。カマイルカの来遊時期は2003年から2007年まで年々早くなっていた。カマイルカの来遊時期に影響を及ぼすと考えられる、津軽海峡の水温や、餌となるカタクチイワシの来遊時期を検討した結果、これらはカマイルカの来遊時期と関係が示唆され、従来の研究結果を支持した。
In spring, Pacific white-sided dolphin (PWS) come to the Tsugaru Strait, Sea of Japan, and is observed mostly in April and May. In this study, the data of sighting surveys conducted from ferry vessels between Hakodate and Aomori from May 2003 to August 2007 was analyzed. Differences in the appearance period of PWS in various years in the strait were discussed. The number of PWS and other cetaceans observed, both groups and individuals, were counted, and the relationship was examined between the appearance of PWS and water temperature and between the appearance of PWS and of its typical prey, anchovy. The first appearance of PWS has become earlier from 2003 to 2007. The relationships of appearance time to water temperature and the high season of anchovy catch were suggested, and it supported past studies.
Type: article (author version)
URI: http://hdl.handle.net/2115/35488
Appears in Collections:水産科学院・水産科学研究院 (Graduate School of Fisheries Sciences / Faculty of Fisheries Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松石 隆

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