| 摘要 |
<P>PROBLEM TO BE SOLVED: To reduce the school of a fishing object gathered in the vicinity of a fishing tool into a proper size, by taking advantage of the repelling action of the fishing object caused by light irradiation. <P>SOLUTION: The fishing tool N for catching a fishing object is arranged in water, the fishing object, that has a positive taxis to light by irradiating the water surface or underwater with light, is gathered in the vicinity of the fishing tool N; the fishing object gathered in the vicinity of the fishing tool N is irradiated with the flash of a light, having a period for making the object of fishing have repelling action; and a school F of the object of fishing is divided, and the school Fa of a part of the divided fishing object is caught by the fishing tool N. <P>COPYRIGHT: (C)2009,JPO&INPIT |
