Thousands of pelagic and demersal fishes inhabit the waters around Korea and many of them are overexploited. One of the reasons is technological development, which increases the efficiency of the vessels continuously. The analysis was conducted to identify the change of fishing power index to develop the vessel and gear technology that may have improved the fishing efficiency of the otter trawl fishery from 1960s to 2010s. Gross tonnage was decreased stably, but horse power was increased annually. The perimeter of net mouth was somewhat longer, but little changed. Color fish finder was utilized from the mid-1960s. Hydraulic net drum were introduced in the early 1990s, and supply rate was gradually increased. Surveys on the supply and upgrading of fishing equipment utilized visiting research. Therefore, the relative fishing power index in the trawl fishery increased about two to three times in the 2010s compared to the 1980s. The results are expected to contribute to reasonable fisheries stock management.

서 론
재료 및 방법
결과 및 고찰
    어선의 변화
    어구의 변화
    어로설비 및 항해계기의 변화
    어획성능지수의 변화
결 론
Reference

• 조현수(군산대학교 해양산업·운송과학기술학부) | Hyun-Su JO (Division of Marine Industry-Transportation Science and Technology, Kunsan National University)
• 서영일(국립수산과학원 연근해자원과) | Young-Il SEO (Fisheries Resources Management Division, National Institute of Fisheries Science)
• 오택윤(국립수산과학원 연근해자원과) | Taeg-Yun OH (Fisheries Resources Management Division, National Institute of Fisheries Science)
• 안영수(경상대학교 해양산업연구소) | Young-Su AN (Institute of Marine Industry, Gyeongsang National University)
• 김병엽(제주대학교 실습선) | Byung-Yeob KIM (Training Ship, Jeju National University)
• 임영경(해양수산부 서해어업관리단) | Yeong-Gyeong IM (Ministry of Oceans and Fisheries, West Sea Fisheries Management Service)
• 이유원(부경대학교 실습선) | Yoo-Won LEE (Training Ship, Pukyong National University) Corresponding author