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The Opening Efficiency of half size modified net for the Anchovy Boat Seine

기선권현망 축소형 개량어구의 전개성능

  • Published : 2004.11.01

Abstract

This study was conducted in order to improvement of fishing gear and fishing operating system for anchovy boat seine by bag net A-type and B-type was attached with half size modified nets. Field experiments were carried out observe geometry of nets by catcher boats. The obtained results are summarized as follows : The actual ratio of net opening in each part of the half size modified nets was increased from fore part to back part of the nets as shown the smallest value about 20% in wing net and the biggest value about 110% in bag net. In addition, vertical net opening of B-type net as measured as 10.9~11.8m in fore bag net and 5.8~8.0m in after bag net were 1~2m greater than 9.0~13.6m of A-type one, and 2~3m less than 9.3~10.4m of A-type one, respectively. Vertical net opening of half size modified net was shown as less variation of towing depth from wing net to inside wing net than those of traditional nets due to stable vertical performance. The mesh distortion or drift and variation of vertical net opening were decreased by improvement of bag nets in order to minimized shape of net pocket phenomenon whenever towing speed is slow. Bag net B-Type attached with dual flapper was shown as less variation in width of bag net and less escapement of anchovy.

Keywords

Half size modified nets;Bag net;Net opening;Towing depth;Anchovy;Towing speed

References

  1. Hunter, J.R. (1972) : Swimming and feeding behavior of larval anchovy, Engraulis mordax, Fish. Bull., 70, 821-838
  2. Webb, P.W. and Corolla, R.T. (1981) : Burst swimming performance of northern an chovy, Engraulis nordax, Larvae. Fish. Bull., 79(1), 143-150
  3. Kawamura, G. and Tabata, K. (1990) : Driving anchovy larvae by large mesh wings of pair midwater trawl, Bull. Japanese Soc. Sci. Fish., 56(7), 1099-1103 https://doi.org/10.2331/suisan.56.1099
  4. Lee, M.A., Lee, K.T. and Wang, J.P. (1995) : Acoustic estimation of biomass and dispelling of larval anchovy herded by large mesh wings of trawl net, J. Fish. Soc. Taiwan, 22(1), 15-22
  5. Lee, K.T., Lee, M-A and Wang, J.P. (1996) : Behavioural responses of larval anchovy schools herded within large-mesh wings of trawl net, Fisheries Research, 28, 57-69 https://doi.org/10.1016/0165-7836(96)00485-7
  6. 기선권현망수산업협동조합 (1992) : 권현망 어업대상 멸치의 생태 및 자원특성, 7-115
  7. 김재오.이병문.오희국 (1995) : 기선권현망 양망성력화 연구, 수진연구보고, 49, 167-173
  8. 김용해.장충식.안영수.김형석 (2001) : 기선권현망어업의 어구개량과 자동화조업시스템 개발-ll, - 실물어구 수중형상 -, 한국어업기술학회지, 37(2), 78-84
  9. 안영수.장충식.이주희 (1997) : 권현망어구의 전개성능, 한국어업기술학회지, 33(2), 118-132
  10. 이병기.양용림.서영태.손부일 (1970) : 기선권현망어업의 연구-I, 어구의 유체저항과 망형형성, 1970년도 기선권현망수협 연구결과보고, 3-48
  11. 이병기.서영태.한희수 (1978) : 기선권현망의 연구-ll, 파치망의 류체저항과 그물꼴에 관하여, 어업기술연구, 14(2), 63-68
  12. 이병기.서영태.염말구.한희수 (1979a) : 기선권현망의 연구-lll, 79형 개량식어구의 실지시험, 어업기술, 15(2), 83-94
  13. 이병기.한희수.윤차안.김광홍 (1979c) : 기선권현망의 연구-lV, 자루그물양망과정의 성역화 시험, 어업기술, 15(2), 95-100
  14. 장충식.김용해.안영수 (2000) : 기선권현망어업의 어구 개량과 자동화 조업시스템 개발 - I- 시험어구의 수중형상 -, 한국어업기술학회지, 36(4), 299-308

Cited by

  1. The opening efficiency of the miniaturized large-scale net for anchovy boat seine to reduce the fleet size vol.54, pp.1, 2018, https://doi.org/10.3796/KSFOT.2018.54.1.012