| Budget Amount *help |
¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2019: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2017: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
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| Outline of Final Research Achievements |
In this study, we developed environmental DNA detection systems for understanding distribution and movement of migratory fish species and evaluating impacts of river structures on them. We found that hidden distributions of endangered Sakhalin taimen and Shishamo smelt and their migratory patterns, as well as Hokkaido-wide distributions of >50 freshwater and anadromous fish species including invasive fish species. Together with estimations of environmental parameters, our results suggested that dams and weirs cause local extinctions of salmonid species and that development of fish ladder had positive effects on fish migration.
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