Development of migrating board at water outlet of rice paddy field for upstream migration of fish.

• MINAGAWA Akiko

  School of Environment, The University of Shiga Prefecture

• WAKAMIAYA Shinji

  Fukken Co., Ltd.

• TAKESHITA Kuniaki

  Fukken Co., Ltd.

• SAGAWA Shiro

  Graduate School of Regional Resource Management, University of Hyogo,

• KAWAGUCHI Yoichi

  Graduate School of Technology, Industrial and Social Sciences, Tokushima University

• MURASE Jun

  Graduate School of Bioagricultural Sciences, Nagoya University

• TSUZUKI Takayoshi

  Japan RiverFront research Center

• FUKAZAWA Yoji

  Toyooka Office of River and National Highway, Kinki Regional Development Bureau, Ministry of Land, Transport and Tourism

• EZAKI Yasuo

  Graduate School of Regional Resource Management, University of Hyogo,

Bibliographic Information

Other Title

• 水田への魚類の遡上を促す遡上板の開発
• スイデン エ ノ ギョルイ ノ ソジョウ オ ウナガス ソジョウバン ノ カイハツ

Abstract

Flashboards are set in the water outlets of paddy fields to manage water depth of the fields. Fish can enter paddy fields through the water outlets of the fields when water overflows due to rainfall and continuous irrigation. However, these flashboards often block fish migration. Therefore, we devised four types of migrating boards, namely, flat type, V-shape type, 5 mm guiding wall type, and 20 mm guiding wall type. These migrating boards cover the top of the flashboard and connect the water surfaces of paddy fields and the top pools of fishways. Upward migration tests on Carassius spp., Gnathopogon elongatus elongatus, Misgurnus anguillicaudatus, and Oryzias spp. were conducted using these boards. The highest number of fish migrated when using the 20 mm guiding wall type board. A total of 374 times of migration were observed for three of the four species; that is, migration was not observed for Oryzias spp., which was found to be unable to migrate probably due to the too strong currents for the species in these set-ups. The 20 mm guiding wall type migration board enabled smaller-sized fish to swim just inside the guiding wall and larger-sized fish to swim at the center of the guiding wall. Based on these observations, we concluded that the 20 mm guiding wall-type migrating board is the most effective in promoting fish migration.

Journal

• Ecology and Civil Engineering

  Ecology and Civil Engineering 23 (1), 79-84, 2020-09-28

  Ecology and Civil Engineering Society

Keywords

• paddy field
• agricultural drainage channel
• fish
• migration
• fishway

Details

• CRID: 1390286426514449792
• NII Article ID: 130007947544
• NII Book ID: AA11528360
• DOI: 10.3825/ece.23.79
• ISSN: 18825974
• ISSN: 13443755
• NDL BIB ID: 030731755
• Web Site: http://repo.lib.tokushima-u.ac.jp/115512
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I030731755
• Web Site: https://www.jstage.jst.go.jp/article/ece/23/1/23_79/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed