선단축소를 위한 기선권현망 축소형 소형어구의 전개성능 = The opening efficiency of the miniaturized small-scale net for anchovy boat seine to reduce the fleet size

다국어 초록 (Multilingual Abstract)

This study was conducted in order to improve opening efficiency of the miniaturized small-scale net for anchovy boat seine gear to reduce the fleet size. Field experiment was performed to observe geometry of nets by catcher boats. When the distance between the two ships was 150, 300 and 450 m and the speed of towing nets was 0.6, 0.9, and 1.2 kt, the vertical opening and actual opening of each part of the miniaturized small-scale net was as follows: the front part of the wing net, 6.8-9.5 m, 45-63%; the middle part of the wing net, 16.1-30.7 m, 34-65%; the entrance of the inside wing net, 21.6-41.2 m, 44-84%; the square and bosom, 17.4-34.0 m, 38-75%; the entrance of the body net, 16.5-29.4 m, 36-64%; the entrance of the bag net, 14.5-21.9 m, 70-106%; the flapper, 6.7-7.7 m, 81-83%, and the end of the bag net, 8.6-10.9 m, 64-81%. The tension of towing nets was measured to be 2,734-6,812 kg approximately, which indicates that the fleet can tow nets with 350 hp, the standard engine horse power. The fishing operation time was shortened comparing to existent net with the large-scale buoy attachment operation. It was also possible to operate the ship without fish detecting boat.

국문 초록 (Abstract)

권현망어업의 선단규모를 현재 5척에서 4척으로 축소하는 데에 목적을 두고 선단축소형 대형어구를 제작하여 해상실험을 행하였으며, 그 결과는 다음과 같았다. 선단축소형 소형어구로서 어구의 형상을 측정한 결과, 오비기 앞끝, 오비기 중간, 수비 입구, 앞창, 나발그물 입구, 자루그물 입구, 깔때기, 자루그물 뒤끝의 망고 변화폭과 실제 전개율은 각각 6.8∼9.5, 16.1∼30.7, 21.6∼41.2, 17.4∼34.0, 16.5∼29.4, 14.5∼21.9, 6.7∼7.7, 8.6∼10.9 m와, 45∼63, 34∼65, 44∼84, 38∼75, 36∼64, 70∼106, 81∼83, 64∼81%로 나타났다. 오비기 앞끝의 그물목줄 연결로 현용어구에 비하여 오비기 앞끝의 전개율이 대폭 개선되어 오비기, 수비그물까지의 정상적인 망고 형성으로 어군의 구집효과가 매우 양호하게 나타났으며, 나발 및 자루그물의 망고도 현용어구에 비하여 높게 형성되었다. 특히 나발그물 부착으로 포켓형상이 대폭 개선되었고 자루그물에서 입망된 어군의 도피가 저감되어 어획효율이 높게 나타났다. 오비기 및 자루그물의 축소에 따라 어구의 예망장력은 2,461∼6,812 kg에 불과하여 법정 기관마력인 350마력으로도 충분한 예망이 가능하였으며, 양망 및 투망시간도 현용어구에 비하여 단축되었고 대형 뜸 부착 조업으로 어탐선 없이도 선단조업이 가능하였다.

참고문헌 (Reference)

1 장충식, "생력형 기선권현망 어구의 전개성능" 한국수산해양기술학회 41 (41): 9-16, 2005

2 안영수, "기선권현망어업의 3척식 자동화 양망시스템 개발" 한국수산해양기술학회 41 (41): 147-155, 2005

3 안영수, "기선권현망어구의 조업과정중 수중형상" 한국수산해양기술학회 41 (41): 101-106, 2005

4 An YS, "The opening efficiency of anchovy boat seine" 33 (33): 118-131, 1997

5 Lee BK, "Study on the anchovy boat seine-Ⅵ -The physical properties of the improved head rope and ground rope-" 16 (16): 23-26, 1980

6 Lee BK, "Study on the anchovy boat seine-Ⅴ -The physical properties of the improved netting twines to be used in the wing net-" 16 (16): 17-22, 1980

7 Lee BK, "Study on the anchovy boat seine-Ⅳ -An experiment to mechanize the hauling operation of bag net-" 15 (15): 95-100, 1979

8 Lee BK, "Study on the anchovy boat seine-Ⅲ-Experimental operation of the improved gear, Model 79-" 15 (15): 83-94, 1979

9 Lee BK, "Study on the anchovy boat seine-Ⅱ-On the hydrodynamic resistance and performance of patti-net-" 14 (14): 63-68, 1978

10 Lee BK, "Study on the anchovy boat seine-Ⅰ -On the hydrodynamic resistance and performance of the conventional gear-" 4 (4): 79-91, 1970

11 Jang CS, "Improving of the fishing gear and development of the automatic operation system in the anchovy boat seine-Ⅲ-Underwater geometry of the prototype net-" 37 (37): 267-274, 2001

12 Jang CS, "Improving of the fishing gear and development of the automatic operation system in the anchovy boat seine-Ⅰ-Underwater geometry of the Model Net-" 36 (36): 299-308, 2000