How to prevent abnormal behavior of tuna

摘要

PPROBLEM TO BE SOLVED: To provide a method for preventing abnormal behavior such as cannibalism, astonished action, death by collision or the like in rearing, storing and transporting the fry or young fish period of tuna fishes in especially the seeds and seedlings production of the tuna fishes. PSOLUTION: The abnormal behavior of the tuna fishes in their rearing, storing and transporting is prevented by a visual sense control of the tuna fishes. Especially the abnormal behavior is prevented by keeping the tuna fishes under an environment for moderating the visual irritation by singly or a combination of making an aquarium wall surface as transparent, installing a visual irritation-buffering material and presenting colored fine particles in the environment. Also, on the contrary, the death by the collision of the tuna fish against an aquarium surface is prevented by the visual sense stimulation. PCOPYRIGHT: (C)2006,JPO&NCIPI