| 摘要 |
PROBLEM TO BE SOLVED: To utilize an optical method for catching, controlling, rearing, etc., of fishes by making the fishes recognize a net which does not actually exist as if the net optically exists for eyes of the fishes by applying characteristics of light. SOLUTION: This method for optically catching is composed by characteristics in that (a) light has a light intensity sufficient to reflect an image and (b) the light having a discriminable color without synchronizing with the color of the sea is projected in a sea area where suspended substances for enabling light projection and the image of a form such as the shape or size for making the fishes visually confirm the net or an obstacle with the light is projected into the sea to promote interception, induction or a trap of a behavior of swimming fishery organisms in the sea area.
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