||Effects of vegetation density on swimming behavior of Zacco platypus
Onitsuka, K. ,
Akiyama, J.Joji, K.
11th Pacific Symposium on Flow Visualization and Image Processing
2017-12 , 11th Pacific Symposium on Flow Visualization and Image Processing(PSFVIP-11 )
It is important to secure the rest area for fish. Fish has the ordinary and dark muscle. When fish uses ordinary muscle, fish gets tired. In such a situation, fish needs a rest. In this study, vegetation density in open-channel is changed. The trajectories of Zacco platypus were observed. It was found that Zacco platypus utilized the slow velocity area as rest space. Staying in vegetation area increases with an increase of vegetation density. An approach rate to vegetation area rises with an increase of vegetation density. However, it was not found that clear relationship with a migration rate of Zacco platypus and vegetation density.
The 11th Pacific Symposium on Flow Visualization and Image Processing, 2017, 1-3 December, Kumamoto, Japan