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The opening efficiency of the miniaturized small-scale net for anchovy boat seine to reduce the fleet size

선단축소를 위한 기선권현망 축소형 소형어구의 전개성능

AN, Young-Su;BACK, Young-su;JIN, Song-han;JANG, Choong-Sik;KANG, Myoung-hee;CHA, Bong-jin;CHO, Youn-hyoung;CHA, Ju-hyeng;KIM, Bo-Yeon
안영수;백영수;진송한;장충식;강명희;차봉진;조윤형;차주형;김보연

  • Received : 2019.01.17
  • Accepted : 2019.02.22
  • Published : 2019.02.28

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.

Keywords

Anchovy boat seine;Opening efficiency;Catcher boats;Wing net;Towing speed

Acknowledgement

Supported by : 한국해양과학기술진흥원