十勝川千代田分流堰に設置した2種類の魚道における魚類遡上状況の検証

抄録

Two types of fishways (pool-and-weir fishway and natural-like bypass fishway) were installed in the Chiyoda Diversion Weir located in the middle reach of the Tokachi River in 2007. We surveyed fish upstream migration and flow characteristics in the two fishways, and evaluated the function of two fishways. It was clarified that target fish migrated upstream in two types of fishways depending on the swimming ability and fish standard length.