| Project/Area Number |
25450269
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Aquatic bioproduction science
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| Research Institution | Hokkaido University |
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Principal Investigator |
Takatsu Tetsuya 北海道大学, 水産科学研究科(研究院), 教授 (50241378)
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| Co-Investigator(Kenkyū-buntansha) |
HOSHI NAOKI 北海道大学, 水産学部, 助教 (50604485)
NAKAYA MITSUHIRO 北海道大学, 水産学部, 特任助教 (80604313)
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| Co-Investigator(Renkei-kenkyūsha) |
ISODA YUTAKA 北海道大学, 大学院水産科学研究院, 准教授 (10193393)
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| Research Collaborator |
INAGAKI YUTA
KANO YOTA
NAKATANI TOSHIKUNI
SUZUKI KOTA
TAMURA JUN'ICHI
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
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| Keywords | アカガレイ / 仔魚 / 稚魚 / 着底 / 輸送 / 噴火湾 |
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| Outline of Final Research Achievements |
To clarify the occurrence mechanism of strong-year classes in flathead flounder Hippoglossoides dubius, transport process of pelagic larvae and juveniles and settled area of juveniles were investigated in Funka Bay and its vicinity in 2013-2015 FY. In May 2013, late pelagic stage larvae were collected with MOHT- and FMT-nets around the area off Muroran City located at the north-east end of the bay, but no larva was collected in 2014-2015. It might be important for the recruitment success in the 2013 year-class that the clockwise vortex off Muroran captured the larvae was retained by the predominantly northwesterly winds. In this vortex, suitable water temperature (4.1-5.6 degrees Celsius) and prey abundance were observed for larval growth. In contrast in August-December through 2013-2015, no settled juvenile was collected on the sea floor with an otter trawl net in and out of the bay with <98-m and 95-354-m bottom depths, respectively.
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