Title
The Fishway for the Downstream Migration of Ayu Larvae
Publication Date
1995
Publication Title
Proceedings of the International Symposium on Fishways '95
Start Page
437
End Page
441
Publication Place
Gifu, Japan
Publisher
The Organizing Committee for International Symposium on Fishways '95 in Gifu
Abstract
Spawning of Ayu, Plecoglossus altivelis, downstream migration of larvae and upstream migration of juveniles were investigated in the Murasaki River, Kitakyushu. It became clear that the number of downstream larvae at the fishway of the weir for industrial use were very few; their ratios to the number of downstream larvae at the point of just under the spawning ground were ranged from 1,1% to 2.5% (mean 1.8%, n=4). Because the density of larvae in the bottom water layer at the weir was distinctly higher than that in the surface, the fishway equipped with slide gate dischargeable the bottom water is necessary.
Notes
Title, abstract, and figure legends in English, remainder of text in Japanese