Author(s): Kouki Onitsuka; Juichiro Akiyama; Ryo Ogata
Linked Author(s):
Keywords: No Keywords
Abstract: It is important to keep suitable area by boulders to make rest area for fish. This study was conducted to research the relations between swimming behavior of Zacco platypus and boulders interval in streamwise direction over open channel bed. Swimming behavior of Zacco platypus was obtained with the aid of two sets of digital video cameras. It was found that swimming of Zacco platypus was stagnant remarkably in case where the boulders interval in downstream direction is narrow. It is because that there are more low velocity spaces in this case compared with case where the boulders interval in downstream direction is wide.
Year: 2018