Additional information regarding changes in the Japanese stick-held dip net for Pacific saury, especially in 1980s

This document provides additional information regarding changes in the stick-held dip net (SHDN) fishery, which enhanced fishing power, especially in 1980s. The information was obtained through surveys over people related to this fishery, literatures and delivery records of the new fishing equipment. The new fishing equipment began to be installed in early 1980s and had spread to almost all the SHDN fishing vessels. The installation of new fishing equipment contributed to increasing trend of CPUE in 1980s. However, because comprehensive data on the installation of new fishing equipment for each vessel are not available at the present stage, CPUE standardization with factors of presence/absence of the equipment cannot be conducted at the present stage.