Elucidation of factors affecting mortality during early life stages of megabenthos: comparative study on megabenthic species with different reproductive season
| Project/Area Number |
23780206
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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 | National Institute for Environmental Studies |
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Principal Investigator |
KEITA Kodama 独立行政法人国立環境研究所, 環境リスク研究センター, 研究員 (90391101)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | 個体数変動 / 初期生活史 / 底棲魚介類 / 貧酸素 / 水温 / 東京湾 / 貧酸素水塊 / 再生産 |
|---|
| Research Abstract |
To elucidate common or different mechanisms of synchronous stock decline of megabenthos with different reproductive season in Tokyo Bay, factors affecting mortality during the early life stages of mantis shrimp (Oratosquilla oratoria; summer spawner) and marbled sole (Pseudopleuronectes yokohamae; winter spawner) were investigated.
Field surveys revealed that mortality between larval and juvenile stages might have affected abundance of mantis shrimp. Analysis of spatio-temporal changes in juvenile mantis shrimp and environmental factors showed that hypoxia could cause failure of settlement and contraction of spatial distribution of juveniel, thereby resulted in decrease of young-of-the-year abundance. On the other hand, field surveys revealed that water temperature was a critical factor affecting young-of-the-year abundance of marbled sole; increase in water temperature during reproductive season might have affected mortality of marbled sole between spawning and early larval stages.
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Report
(4 results)
Research Products
(24 results)
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[Presentation] Surveys on environmental pollution and possible adverse effects by radionuclides in wildlife, after severe accidents of Fukushima Dai-ichi Nuclear Power Plants, Japan2012
Author(s)
Horiguchi T, Kodama K, Ihara S, Takase M, Ohta, Yoshii H, Mizuno S, Kamiyama K, Maki H, Tanaka A, Karube S, Shiraishi H, Ohara T
Organizer
The 5th Bilateral Seminar Italy-Japan Physical and Chemical Impacts on Marine Organisms : For the Sustainable Quality of Human Society Development on Marine Environment
Place of Presentation
Consiglio Nazionale delle Ricerche, Area della Ricerca di Palermo (Italy)
Year and Date
2012-11-27
Related Report
Invited
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[Presentation] Surveys on environmental pollution and possible adverse effects by radionuclides in wildlife, after severe accidents of Fukushima Dai-ichi Nuclear Power Plants, Japan2012
Author(s)
Horiguchi T, Kodama K, Ihara S, Takase M, Ohta , Yoshii H, Mizuno S, Kamiyama K, Maki H, Tanaka A, Karube S, Shiraishi H, Ohara T
Organizer
The 5th Bilateral Seminar Italy-Japan Physical and Chemical Impacts on Marine Organisms: For the Sustainable Quality of Human Society Development on Marine Environment
Place of Presentation
Consiglio Nazionale delle Ricerche, Area della Ricerca di Palermo (Italy)
Related Report
Invited
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