Author(s): Kouki Onitsuka; Juichiro Akiyama; Tomoya Sako
Keywords: No Keywords
Abstract: When fish gathering device is set in the entrance of fishway, it is possible that this affect the migration rate. It is assumed that eel (Anguilla japonica) gathers near the area of water spraying. However, little is known about effects of fish gathering by water spraying. This study was made to analysis effects of fish gathering of eels under the condition that the range and the discharge of water spraying are changed. It was found that water spraying has effects of fish gathering as compared with non-spraying in this experiment. Besides, effects of fish gathering grow with increasing the range of water spraying and the discharge.