| Project/Area Number |
08459029
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
広領域
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| Research Institution | National Institute of Polar Research |
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Principal Investigator |
NAITOU Yasuhiko National Institute of Polar Research, Professor, 教授 (80017087)
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| Co-Investigator(Kenkyū-buntansha) |
NAITOU Nobuko Junior University of Swowa Medicine, Professor, 理学療法学科, 教授 (30053903)
OKADA Masaki National Institute of Polar Research, Information Science Center, Research Assoc, 情報科学センター, 助手 (40270425)
SATOU Katufumi National Institute of Polar Research, Division of Research, Research Associate, 研究系, 助手 (50300695)
KATOU Akiko National Institute of Polar Research, Division of Research, Research Associate, 研究系, 助手 (80261121)
谷村 篤 三重大学, 生物資源学部, 助教授 (10125213)
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| Project Period (FY) |
1996 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥7,700,000 (Direct Cost: ¥7,700,000)
Fiscal Year 1997: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1996: ¥4,300,000 (Direct Cost: ¥4,300,000)
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| Keywords | chum salomn / migration / environment / swim behavior / swim velocity / ambient temperature / vertical migration / マイクロデータロガー / 行動 / 遊泳水深 |
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| Research Abstract |
Aquatic animals often show migration behavior and strong homing behavior. The salmons are well known for their strong homing behavior. Chum salmon return to their natal river after spending for a few years for feeding in the North Pacific. Thus many scientists are interested min such behavior and studied on their mechanisms of homing behavior and mechanisms of osmo regulation system from point view of physiology and behavior. However nothing is known how salmon swim in the ocean. We conducted the experiments of measurement of their swim behavior and ambient temperature by attaching the micro data loggers during their homing migration to the natal river and examined how temperature environment affect their migration behavior. The results showed that fish avoid high temperature water mass of the surface layr and sank to the bottom. This was understood that fish saved their energy loss by swimming cooler water and then they detected the bottom topography for their geolocation to compensate the odor homing mechanism which only function in the surface layr.
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