새우류 어업에서 어구의 망목 크기가 부수어획량에 미치는 영향

• 영문명: Effect of Mesh Size on the Bycatch in the Shrimp Fisheries of Korea
• 발행기관: 한국생태공학회
• 저자명: 오철웅(Chul Woong OH)
• 간행물 정보: 『한국생태공학회지』한국생태공학회지 제3권 제1호, 29~40쪽, 전체 12쪽
• 주제분류: 공학 > 환경공학
• 파일형태: PDF
• 발행일자: 2012.12.30

영문 초록

The composition of shrimp and bycatch species caught by two fishing gears (shrimp beam trawl and single-walled tangle net) in the shrimp fisheries of Korea was examined from the major fishing ground during two years between October 2002 and September 2004. A total of 127 species was observed in shrimp trawl and a total of 70 species in single-walled tangle net. These samples were occupied by 74.2% of shrimps, 11.6% of fishes, 7.5% of other crustacens and 4.2% of shellfishes in shrimp trawl, and 88.9% of shrimps and 10.4 % of fishes in single-walled tangle net in terms of total numbers. These samples were occupied by 36.1% of fishes, 25.8% of shellfishes and 14.4% of shrimps in shrimp trawl and by 64.5% of shrimps, 32.7% of fishes in single-walled tangle net in terms of total catch weight. Main bycatch calculated by biomass was Chaeturichthys stigmatias (21.6%), Rapana venosa (21.1%) and Charybdis japonica (12.5%) in beam trawl, and Collichthys lucidus (14.7%), Thryssa kammalensis(11.4%) and Setipinna taty (10.0%) in single-walled tangle net. During the study period, the bycatch-to-shrimp ratio of shrimp beam trawl and single-walled tangle net were 0.87 and 0.24, respectively. Experiment of gear selectivity with increasing mesh size from mesh size in present use to 50% and 100% increase of its mesh size, showed that 50% selectivity size increased and bycatch-to-shrimp ratio are reduced. Measures to reduce the bycatch proportion in the shrimp fisheries are discussed with various management options.

목차

Abstract

1. 서론

2. 재료 및 방법

3. 결과

4. 고찰

참고문헌

키워드

Bycatch shrimp gear selectivity 50% selectivity size