| 摘要 |
PROBLEM TO BE SOLVED: To provide a vessel for breeding shellfishes capable of promoting the growth of shellfishes in a sand bed by fluidizing water in the sand bed in the vessel by taking advantage of tide rising and ebbing, and to provide a method for breeding shellfishes using the vessel. SOLUTION: The vessel comprises a vessel 1 having water-impermeable side walls 5 and a water-permeable bottom 4 and a sand bed 2 for breeding shellfishes inside the vessel 1. In this vessel, a shield plate 41 is set up just above the sand bed 2 nearly throughout the sand bed. When the water level in the vessel 1 becomes lower than the outside water level due to tide rising and ebbing, water flows via the water-permeable bottom of the vessel 1 into the vessel. On the contrary, if the water level in the vessel 1 is higher than the outside water level, the water in the vessel 1 flows through the sand bed via the bottom into the outside. As the space between the sand surface and the shield plate 41 is narrow, water penetrated through the sand bed 2 is prevented from rising, resulting in a horizontally moving flow, which, in turn, makes seawater with nutrients stayed on the sand bed surface reduced as a result of their intake by shellfishes move horizontally to effect excluding the seawater from the sand bed surface, leading to feeding fresh seawater containing nutrients to the sand bed surface. COPYRIGHT: (C)2009,JPO&INPIT
|
