| Project/Area Number |
23780205
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
General fisheries
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| Research Institution | Fisheries Research Agency |
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Principal Investigator |
FUKUDA Hiromu 独立行政法人水産総合研究センター, ・国際水産資源研究所・くろまぐろ資源部, 研究員 (50581063)
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| Project Period (FY) |
2011 – 2012
|
| Project Status |
Completed (Fiscal Year 2012)
|
| Budget Amount *help |
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | 生態 / 行動 / 資源 / クロマグロ / 仔稚魚期 / 鉛直行動 / 遊泳力 / 成長 / 遊泳モデル / 明暗環境 / 魚群行動 |
|---|
| Research Abstract |
Although Pacific bluefin tuna (PBF) has larger body density than the sea water, their swimming ability is quite low during the early larval stage. We observed their swimming behavior and investigated how PBF control their swimming direction and depth by developing their swimming ability, and how they develop their escaping behavior. PBF larvae started to improve their swimming ability from 3 days post hatching and control their swimming depth by aggressive swimming in a horizontal direction. Their turning movement was improved around 20 days post hatching, which coincides with the metamorphosis from the larvae to juvenile.
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