Diel differences of catch and behavior in Lepidotrigla microptera
2007
Fujiwara, K.(Kyoto-fu. Inst. of Oceanic and Fishery Science, Miyazu (Japan)) | Yamasaki, A. | Miyajima, T. | Tsuji, S. | Yagishita, N.
Diel differences of catch and behavior in Lepidotrigla microptera were examined using a beam trawl net and an underwater video camera attached to the net, off Tango Peninsula. The catch during the night was higher than that during the day; the number of individuals recorded by video camera during the night was also higher than during the day. While the frequency of individuals swimming to the outlet of the beam trawl net to escape was about 60 % during the day, those remaining at rest on the bottom were about 71 % during the night. Therefore, the diel difference of the catch was indicated to be caused by the diel differences of abundance near the bottom and the behavior of this species.
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