| Project/Area Number |
22510034
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental impact assessment/Environmental policy
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| Research Institution | Chiba Institute of Science |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
KOYA Yasunori 岐阜大学, 教育学部, 教授 (30273113)
TAHARA Daisuke 福井県立大学, 海洋生物資源学部, 講師 (20295538)
YANBE Hidenobu 東京農業大学, 生物産業学部, 講師 (40423743)
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| Co-Investigator(Renkei-kenkyūsha) |
IGUCHI Kei'ichiro 独立行政法人水産総合研究センター中央水産研究所, 内水面研究部・生態系保全研究室, 室長 (00371865)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2012: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2011: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2010: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 環境評価手法 / 冷水性底生魚類 / 温暖化 / 水温 / カジカ種群 / 流程生息分布 / 河川工作物 / 河川内移動 / 産卵行動 |
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| Research Abstract |
We examined the effects of eco-physiological stress due to elevated water temperature on survival, movements, and reproductive physiology of benthic cold-water fish (Cottus pollux spp.) with poor swimming ability both by field observations and experimental procedures. Instream obstructions substantially precluded going upstream of amphidromous (middle-egg type) and fluvial land-locked sculpins (large-egg types). Nesting behavior of small-egg type males were rarely observed under high water temperature condition (i.e., 4-5℃ warmer than river water). Together with the finding of lowest survival rates of the larvae of middle-egg type under highest water temperature condition (15 ℃), suggesting negative impacts on their reproductive activity and survival in early life stage. These findings are useful to estimate the negative impacts of elevated water temperature on eco-physiological aspects of Cottus pollux spp.
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