기선권현망어업에서 어로기술개발에 따른 어획성능지수 변화

Abstract

Anchovy (Engraulis japonicus) is the most caught species in the last three years of fish production statistics in Korea. The anchovy is caught by dragnet, set net and stow net, among which about 50~60% is caught by anchovy dragnet. For the sustainable use of anchovy, the fishing power of anchovy dragnet is very important. Therefore, the change of fishing power index were analyzed to identify the development of the vessel and gear technology that may have improved the fishing efficiency of the anchovy dragnet fishery from 1960s to 2010s. Engine output per net vessel was increased to 40 hp in 1960, to 150 hp in 1970s, to 220 hp in 1990s, to 350 hp in 2000s and to 650 hp in 2015. As the engine output of the net vessel increased, the length of the fishing net gradually increased. Fishing equipments started to be supplied with net hauler and side roller in the mid-1980s, and fish finders began to be supplied in the mid-1960s and gradually increased. Surveys on the supply and upgrading of fishing equipment utilized visiting research. Therefore the relative fishing power index in the anchovy dragnet fishery increased from 1.0 in 1980 to 1.3 in 1990, to 1.7 in 2000 and to 2.5 in 2015. The results are expected to contribute to reasonable fisheries stock management.