Abstract
In coastal areas with the fisheries industry as the core industry, the Great East Japan Earthquake seriously damaged stationary nets of salmon, scallops, oysters, seaweeds and the like. In particular, the profitability of stationary-net fishery on the coast was exacerbated by the sharp decline of salmon landing. Therefore, I will clarify the current situation and problems of Iwate Prefecture, where advanced technology is to be introduced, on salmon-release projects, to show future directions. The main result is that the salmon's regression rate deduced from the past data tended to be close to the regression rate in the 1970s. Therefore, restructuring of discharge projects by introducing advanced technology is expected to improve the regression rate. Next, I summarize the current status of fixed nets (fishery) by saying that salmon became the mainstay in the income structure, and it became clear that it was required to raise the regression rate by introducing advanced technology to discharge projects.
