2002 Fiscal Year Final Research Report Summary
A study on mitigation measures for preservation of freshwater fishes in rice paddy area
| Project/Area Number |
13660237
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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 |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Utsunomiya University |
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Principal Investigator |
MIZUTANI Masakazu Utsunomiya Univ., Faculty of Agriculture, Professor, 農学部, 教授 (70093143)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUI Hiroyuki Utsunomiya Univ., Faculty of Agriculture, Assistant Professor, 農学部, 助手 (30292577)
GOTO Akira Utsunomiya Univ., Faculty of Agriculture, Professor, 農学部, 教授 (80162139)
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| Project Period (FY) |
2001 – 2002
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| Keywords | fresh water fish / mitigation measures / rice paddy areas / small scale fishway / artificial pond |
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| Research Abstract |
The results obtained by the research project are as follows ;
1) The swimming ability of two fishes, loach and crucian carp that represent freshwater fishes in rice paddy area, were evaluated by using a pipeline apparatus.
2) The physical requirements for upward migration of two freshwater fishes at the Cascade-X type fishway were clarified through the laboratory test.
3) The effects of re-connected four water zones by small scale fishways, namely river zone, canal zone, earth-lined ditch and paddy field, on fish fauna were investigated, and it was proved that the fishways ensured fish migration in the four water zones. 4
4) The functions of re-connected water zones as fish habitats were verified ; the paddy field works for spawning, feeding and refuge site, and the earth-lined ditch for spawning and wintering site.
5) It was confirmed that the artificial pond located between a river and rice paddies fractionated as an effective mitigation measure in terms of freshwater fishes habitats.
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Research Products
(6 results)
