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

선단 축소를 위한 기선권현망 축소형 대형 어구의 전개 성능

  • AN, Young-Su (Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • BACK, Young-Su (Green-Ship Research Division, Research Institute of Medium & Smail Shipbuilding) ;
  • JIN, Song-Han (Green-Ship Research Division, Research Institute of Medium & Smail Shipbuilding) ;
  • JANG, Choong-Sik (Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • KANG, Myoung-Hee (Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • CHA, Bong-Jin (Fisheries Resource and Environment Division, Namhae Sea Fisherise Research Institute, National Institute of Fisheries Science) ;
  • CHO, Youn-Hyoung (Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • KIM, Bo-Yeon (Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • CHA, Ju-Hyeng (Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
  • 안영수 (경상대학교 해양과학대학 해양산업연구소) ;
  • 백영수 (중소조선연구원) ;
  • 진송한 (중소조선연구원) ;
  • 장충식 (경상대학교 해양과학대학 해양산업연구소) ;
  • 강명희 (경상대학교 해양과학대학 해양산업연구소) ;
  • 차봉진 (국립수산과학원 남해수산연구소) ;
  • 조윤형 (경상대학교 해양과학대학 해양산업연구소) ;
  • 김보연 (경상대학교 해양과학대학 해양산업연구소) ;
  • 차주형 (경상대학교 해양과학대학 해양산업연구소)
  • Received : 2018.01.17
  • Accepted : 2018.02.14
  • Published : 2018.02.28

Abstract

This study was conducted in order to improve opening efficiency of the miniaturized large-scale net for anchovy boat seine gear to reduce the fleet size. Field experiments were performed to observe geometry of nets by catcher boats. When the distances between the two ships were 150, 300 and 450 m, and the speeds of towing nets were 0.6, 0.9, and 1.2 k't, respectively. The vertical opening and actual opening of each part of the miniaturized large-scale net was as follows: the front part of the wing net, 8.7-13.3 m, 51-78%; the middle part of the wing net, 28.1-34.2 m, 55-67%; the entrance of the inside wing net, 31.3-38.5 m, 60-73%; the square and bosom, 22.7-29.6 m, 47-62%; the entrance of the body net, 20.9-26.4 m, 42-52%; the entrance of the bag net, 17.2-21 m, 72-89%; the flapper, 13.2-15.3 m, 78-83%; and the end of the bag net, 13.2-15.7 m, 72-75%. By connecting the net pendants with the front part of the wing net, the opening of the front part of the wing net was significantly improved compared to the traditional gear, which ensured both the wing net and the inside wing net with a normal net height. This, in turn, increased the efficiency of herding. The height of the body and bag nets was also higher than that of the tradition gear. In particular, the body net attached to the gear significantly improved the pocket shape of the gear and reduced the number of fish that were caught and escaped from the bag net, which increased the rate of fishing. The tension of towing nets was measured approximately between 2,958 and 7,110 kg, which indicates that the fleet can tow nets with 350 ps, the standard engine horse power. The fishing operation time was shortened compared with of the existent net, and the large-scale buoy attachment operation 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

References

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