OPTIMUM SHIP ARRANGEMENT FOR DREDGE FISHERY OF SURF CLAM BY FISHERY MANAGEMENT-SYSTEM

A fishery management system was developed to produce a reasonable oper ation method for fishery of the Sakhalin surf clam Spisula sachalinens is, and was applied at an experimental fishing area. The system was us ed by a fishery management commission organized by fishermen. The syst em consisted of three subprograms: 1) a monitoring and analysis progra m of stock distribution and unit price fluctuations, 2) a program to d etermine concrete effort arrangement and optimum ship operation, 3) an evaluation program of fishing operations. When the system was applied , a significant improrvement was obtained, as compared with that of un organized fishing. It is suggested that the program system enables sel ective fishing in consideration of market prices and the effective uti lization of surf clam stock.