The Opening Efficiency of Anchovy Boat Seine

권현망어구의 전개성능

  • Published : 1997.06.01

Abstract

An opening efficiency experiment of anchovy boat seine has been carried out using a half size of the ordinary seine to reduce the size of the seine net and to improve the fishing efficiency from field operation. The intervals of towing boats were set at 100, 200 and 300m, and the towing speed, at 0.6, 0.9, and 1.2k't by possible combinations of them. The vertical openings of wing net, inside wing net, bagnet and flapper as well as the spreads of the seine net and the towing tension of the warp were measured, to find out efficient fishing gear and method of the anchovy boat seine. The results obtained are as follows : 1. The vertical opening of the inside wing net ranged from 8.7m to 12.0m at the normal current and from 7.0m to 10.0m at the counter current, and that of the wing net, from 8.4m to 19.8m at the normal current and from 4.9m to 16.3m at the counter current. The vertical opening of the wing net and inside wing net decreased as the towing speed and intervals of the boats increase, from 66% to 16% and from 32% to 18% of the normal opening, respectively. 2. The vertical opening of the fore of bag net ranged from 7.9m to 12.8m at the normal current and from 7.4m to 9.7m at the counter current, and that of the flapper, from 3.4m to 5.1m at the normal current and from 4.4m to 5.1m at the counter current, and that of the flapper, from 3.4m to 5.1m at the normal current and from 4.4m to 5.1m at the counter current. The vertical opening of the bag net was from 98% to 57% of the normal opening and the flapper showed a circular shape and it rose up to the upper layer with a slower towing speed. 3. The vertical opening of the end of the bag net ranged from 7.1m to 9.3m at the normal current and from 7.4m to 8.8m at the counter current. The end of the bag net rose up to the upper layer, This phenomenon was more apparent as the towing speed and the interval of the boats increase. 4. The towing tension of the experimental nets increased from 648kg to 2,716kg at the normal current and from 1,050kg to 6,010kg at the counter current with increasing towing speed. 5. The net depth of the anchovy seine was stable with the higher towing speed and the wider interval of the boats, but it was unstable by rising up to the upper layer with the lower towing speed and the narrower interval of towing boats.

Keywords

References

  1. 統水 論文集 no.28 權現網漁業의 漁況과 資源의 適正利用에 關하여 張忠植;李明奎
  2. 慶尙大學校 水産大學 海洋産業硏究所報 v.1 權現網漁業의 現況과 改善方向에 關하여 張忠植
  3. 水産硏究 no.4 機船權現網漁業의 對象資源의 動向 金容文
  4. 정문사문화 v.95 no.5 機船權現網漁業, 現代海洋 現代海洋社
  5. 水振硏究 報告 v.49 機船權現網 揚網 省力化 硏究 金在午;李炳文;吳熙國
  6. 1970년도 機船權現網水協 硏究結果報告 機船權現網漁業의 硏究-I, 漁具의 流體抵抗과 網形形成 李秉錡;梁龍林;徐永台;孫富一
  7. 漁業技術硏究 v.14 no.2 機船權現網의 硏究-II, 파치網의 流體抵 抗과 그물꼴에 관하여 李秉錡;徐永台;韓熙銹
  8. 漁業技術 v.15 no.2 機船權現網의 硏究-III, 79型 改 良式 漁具의 實地試驗 李秉錡;徐永台;廉末九;韓熙銹
  9. 1979년도 機船權現網水協硏究結果報告書 機船權現網漁具의 改良 및 省力化에 試驗 李秉錡;徐永台;韓熙銹
  10. 漁業技術 v.15 no.2 機船權現網의 硏究-IV, 자루 그물揚網過程의 省力化 試驗 李秉錡;韓熙銹;尹且安;金光弘
  11. 漁業技術 v.16 no.1 機船權現網의 硏究-IV, 뜸줄 발줄 材料로서 開發된 로우프의 物理的 特性 李秉錡;孫泰俊;盧甲喆
  12. 漁業技術 v.16 no.1 機船權現網의 硏究-V, 날개그물용 材料로서 開發된 그물실의 物理的 特性 李秉錡;徐永台;李周睦
  13. 水辰硏究報告 v.27 機船權現網의 漁具漁法 改良 硏究 韓熙銹;秋海大;李炳文;全成鐸;金明男;尹且安
  14. 水産硏究 no.4 權現網漁業의 現況과 漁具 漁法의 展望 張忠植
  15. 沿近海漁業論 李秉錡;朴丞源;金鎭乾