| 摘要 |
PROBLEM TO BE SOLVED: To provide a fish preserve net and a device therefor that enable tuna farming whether it is a circular fish preserve net with a diameter of 10 m or a fish preserve net in the form of a 10 m×10 m square, although the farming of Pacific bluefin tuna, albacore, bigeye tuna, and yellowfin tuna (hereinafter abbreviated as tuna) is only possible with fish preserve nets with diameters of 20 m or more and a depth of 10 m because otherwise tuna would collide with the fish preserve nets and die from neck fracture.SOLUTION: A fish preserve net 1 uses gauze constructed of wire formed by galvanized copper or iron or uses a fishing net obtained by weaving a conductive thread having a copper wire therein, as a circular fish preserve net 1 with a diameter of 10 m or a fish preserve net 1 in the form of a 10 m×10 m square, through which an alternating current or pulsed current is passed to form a protective wall of electric current inside the fish preserve net 1. Also, lure kelp 11 and ribbons 12 are formed on the inside or interior wall portion of the fish preserve net 1. |
