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Physiological Mechanisms of Homing Ability in Sockeye Salmon : From Behavior to Molecules Using a Lacustrine Model

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タイトル: Physiological Mechanisms of Homing Ability in Sockeye Salmon : From Behavior to Molecules Using a Lacustrine Model
著者: Ueda, Hiroshi 著作を一覧する
Yamamoto, Yuzo 著作を一覧する
Hino, Hiroshi 著作を一覧する
発行日: 2007年
出版者: American Fisheries Society
引用: Sockeye Salmon Evolution, Ecology, and Management
誌名: American Fisheries Society Symposium
巻: 54
開始ページ: 5
終了ページ: 16
抄録: A number of studies have investigated the amazing abilities of salmon to migrate long distances from the ocean to their natal streams for spawning, but much remains unknown because of the difficulties in following the whole life cycle, especially the oceanic migration. Kokanee Oncorhynchus nerka (lacustrine sockeye salmon), offer promise as systems for studying the physiological mechanisms of homing ability in salmon. Three types of physiological study, from behavior to molecules, were conducted using Lake Toya and Lake Shikotsu, Hokkaido, Japan, as model "oceans" and are reviewed here. The first study examined homing behavior of mature sockeye salmon in Lake Toya using ultrasonic tracking systems, testing for use of visual cues and magnetic orientation. Visual cues, but not magnetic orientation, appeared to be important in straight homing behavior. The second study examined the effect of hormonal controlling mechanisms, in relation to sexual differences, on homing duration (the time required to home) and homing accuracy during the spawning season in Lake Shikotsu. Administering gonadotropin-releasing hormone (GnRH) analog shortened homing duration. The third study examined the olfactory discriminating ability of home stream odorants using a twochoice test tank. Sockeye salmon exhibited preferential upstream selective movement toward artificial home stream water that had been prepared to mimic the composition of amino acids and related substance of the home stream. These results demonstrate the suitability of the lacustrine model for studying the physiological mechanisms of homing ability in sockeye salmon.
資料タイプ: bookchapter
URI: http://hdl.handle.net/2115/39879
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 上田 宏

 

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