ENVIRONMENTAL IMPROVEMENTS STRUCTURES FOR A SHELLFISH FISHERIES

The present invention provides a structure for artificially forming sediment of shellfish fisheries and a method for improving sediment of shellfish fisheries by forming a tidal pool and a reservoir environment beneficial for shellfish growth and installing a structure to enable vortex to be generated in a place where bottom sediment is highly stacked. In the shellfish fisheries, a bottom fixing plate maintaining the center of gravity in the sediment of shellfish fisheries is buried at a preset depth to be fixed, wherein the bottom fixing plate is able to be helpful in prevention of shell larva loss and bottoming of spat; a supporting pole is connected to the bottom fixing plate; and a vortex generating plate with a preset area is connected to the upper part of the supporting pole at a fixed angle. According to the present invention, vortex, formed by the structure and the tidal pool artificially formed under the structure, forms a good environment for bottoming shellfish. The coarse sediment and seawater collected in the formed tidal pool alleviate rapid change in temperature such as mud flat temperature rising in ebb tide in summer and temperature lowering in winter, which is able to solve problems including long exposure time of fisheries, which has been pointed out as a mortality cause from the past, and to form a good environment for shellfish growth. [Reference numerals] (a) Planar structure; (AA,CC) Tidal current direction; (b) Inclined structure; (BB,DD) Ground surface