Journal of the Korean Society of Fisheries and Ocean Technology (수산해양기술연구)

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Improvement of fishing efficiency of Danish seine to ratio of buoyancy by sinking force

부력조정에 의한 외끌이기선저인망의 어획성능 개선

  • Lee, Hye-Ok (Department of Fisheries Physics, Graduate school, Pukyong National University) ;
  • Lee, Ju-Hee (Division of Marine Production System Management, Pukyong National University) ;
  • Kwon, Byeong-Guk (Division of Marine Production System Management, Pukyong National University) ;
  • Kim, Bu-Yeong (Department of Fisheries Physics, Graduate school, Pukyong National University) ;
  • Kim, Byung-Soo (Department of Fisheries Physics, Graduate school, Pukyong National University) ;
  • Yoo, Je-Bum (Department of Fisheries Physics, Graduate school, Pukyong National University)
  • 이혜옥 (부경대학교 수산물리학과) ;
  • 이주희 (부경대학교 해양생산시스템관리학부) ;
  • 권병국 (부경대학교 해양생산시스템관리학부) ;
  • 김부영 (부경대학교 수산물리학과) ;
  • 김병수 (부경대학교 수산물리학과) ;
  • 유제범 (부경대학교 수산물리학과)
  • Published : 2007.05.31
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Abstract

This study was carried out to offer fundamental data for improving the fishing efficiency of the Danish seine. The net height and the shape in the water was measured to analyze the efficiency of the existing Danish seine. And then, an improved fishing gear was developed based on the results and was tested in the field. Measuring devices were attached on center of a ground rope and a head rope. The net height is the spread distance between the ground rope and the head rope, which was measured on the different ratio of buoyancy. The results are obtained as follows. The net height estimated from the design plan of horizontal hanging ratio 0.40 in the existing Danish seine A and B estimated both 4.94m. The net height of the existing Danish seine A and B was respectively 1.8m and 2.3m, which form 36.4% and 46.2% of the net height estimated from the design plan. Buoyancy was changed as 79.5% and 96.2% relative to the sinking force in the existing Danish seine. The net height of 79.5% was 3.95m which increased to 80% of the estimated net height. The other shows the same result with the first case. It is not necessarily that the high buoyancy/sinking force ratio make the high net height, 80% is adequate as the buoyancy/sinking force ratio. In case of the improved Danish seine, the mean net height was about 5.0m, means 58.3% of estimated net height 8.58m.

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References

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