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ID 115512
タイトル別表記
Development of migrating board at water outlet of rice paddy field for upstream migration of fish
著者
皆川, 明子 滋賀県立大学
若宮, 慎二 復建調査設計
竹下, 邦明 復建調査設計
佐川, 志朗 兵庫県立大学
村瀬, 潤 名古屋大学
都築, 隆禎 リバーフロント研究所
深澤, 洋二 国土交通省
江崎, 保男 兵庫県立大学
キーワード
paddy field
agricultural drainage channel
fish
migration
fishway
資料タイプ
学術雑誌論文
抄録
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.
掲載誌名
応用生態工学
ISSN
13443755
18825974
cat書誌ID
AA11528360
出版者
応用生態工学会
23
1
開始ページ
79
終了ページ
84
発行日
2020-09-28
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
jpn
著者版フラグ
出版社版
部局
理工学系