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The year-end report meeting of the Chikuma River and Shinano River Research Group was held in FY2024!

IFB

On Thursday, February 13, 2025, the results report meeting of the River Erosion Control Technology Research and Development and River Ecology General Research Group of the Ministry of Land, Infrastructure, Transport and Tourism (Principal Investigator: Professor Hiroshi Hakoyama) was held online, and the Institute of Freshwater Biology of Nagano University, the Nagano Prefectural Fisheries Experimental Station, and Shinshu University reported this year’s research results to the Chikuma River and Shinano River River Office.

This research group, a collaboration between the Institute of Freshwater Biology of Nagano University, Shinshu University, and the Nagano Prefectural Fisheries Experimental Station, is working on the Ministry of Land, Infrastructure, Transport and Tourism research project “The Importance of Habitat Continuity in Rivers - Impact Assessment and Conservation Measures for River Ecosystems” (Principal Investigator: Hiroshi Hakoyama), and there was lively discussion at each research presentation. This is the third year of the five-year general research, and the ultimate goal is for the research results to contribute to the river basin flood control in the Chikuma and Shinano Rivers, which is being carried out by the River Office.

Meeting Agenda

Opening remarks: Deputy Director Chikuma River Office

  1. Introduction: Hiroshi Hakoyama (IFB)

  2. Sakie Kodama (IFB): Distribution survey of two striped loach species

  3. Leanne Faulks (IFB): Fragmentation of local waterways affects freshwater fish biodiversity

  4. Alessandra Cera (IFB): Effects of water flow velocity on the metabolic functionality of freshwater epilithic biofilms: a field and laboratory study

  5. Hiroshi Hakoyama (IFB): Towards modeling fragmented river systems

  6. Ueshima Tsuyoshi, Shinkai Takamasa and Tashiro Seiya* (Nagano Prefectural Fisheries Experiment Station): Decrease in CPUE of smallmouth bass after typhoon disturbance in Chikuma River; Investigation of distribution of brown trout in Chikuma River by species-specific environmental DNA analysis and identification of river crossing structures that prevent distribution expansion

  7. Masashi Toyoda (Faculty of Engineering, Shinshu University): River channel evolution in the middle reaches of the Shinano River, focusing on sediment dynamics within the river channel and changes in channel morphology

  8. Shoichiro Iio (Faculty of Engineering, Shinshu University): Development of fish migration monitoring technology

  9. General discussion

  10. Comments from the Chikuma River Bureau