| 摘要 |
<p>[PROBLEMS] To simultaneously achieve: (i) enabling migratory fish such as tuna to have safe and sufficient exercises without colliding the wall, (ii) allowing the coexistence of adult fish with juvenile fish and fry fish, (iii) largely saving the driving power of a pump for water purification, and (iv) laborsaving in washing and regenerating a filtration unit for removing waste materials. [MEANS FOR SOLVING PROBLEMS] A system for feeding migratory fish the inside of which is divided into a circular feeding tank (1) and a notched circular water-purification tank (3) in a circular shape with a missing and in which the feeding tank and the water-purification tank are located in close contact with each other like spectacles, characterized in that: the inside of the feeding tank is partitioned with a net sheet (16) into migration lanes for adult fish, juvenile fish and fry fish (11, 12, 13) respectively; circulation flows (14) in the same direction are flown in the individual lanes; the water-purification tank is provided with a filtration unit (5) and purified water having been filtered is stored therein; and these tanks (1, 3) are connected to each other via a water channel (15), by which the water in the feeding tank is supplied into the filtration unit due to the dynamic pressureof the circulation flows, and a circulation unit (4), by which the water in the water-purification tank is jetted into the feeding tank to form the circulation flows, and thus have substantially the same water levels.</p> |
