2014 Fiscal Year Final Research Report
Analysis of chum salmon homing behavior on extreme changed natal river
| Project/Area Number |
25660153
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Aquatic bioproduction science
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Keywords | シロサケ / 母川回帰 / バイオテレメトリー |
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| Outline of Final Research Achievements |
In order to elucidate the effect of Tsunami (11th, May, 2011) on homing behavior of salmon, salmon were tracked in inner part of Otsuchi bay. Fishes captured at the center of the bay were tagged with ultrasonic transmitter and released. Four prominent behaviors were observed; 1) river entry without access to other river, 2) river entry after a few accesses to river, 3) no river entry without access to other river and 4) no river entry after accesses to river (type 4). In 2014, 2 fishes classified to type 4 were 4 years old which went to sea in 2011. Fishes released after Tsunami will come back to the natal river in this winter, and the effect of Tunami on homing behavior will be clarified by comparing of behavior between fishes before and after Tsunami.
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| Free Research Field |
行動生理学
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