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A selective effect of grid and window net in the shrimp beam trawl fishery

새우조망 어업에서 그리드와 윈도우 네트의 선택효과

  • JANG, Choong-Sik (Department of Marine Production/Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • CHO, Youn-Hyoung (Department of Marine Production/Institute of Marine Industry, College of Marine Science, Gyeongsang National University) ;
  • AN, Young-Su (Department of Marine Production/Institute of Marine Industry, College of Marine Science, Gyeongsang National University)
  • 장충식 (경상대학교 해양생산공학과/해양산업연구소) ;
  • 조윤형 (경상대학교 해양생산공학과/해양산업연구소) ;
  • 안영수 (경상대학교 해양생산공학과/해양산업연구소)
  • Received : 2015.07.30
  • Accepted : 2015.08.25
  • Published : 2015.08.31

Abstract

The study aims at a selective effect of the Grid and Window net in the shrimp beam trawl. The experimental trawling of the Proto type, Grid type and Grid and Window net type was performed in a sea area of Geo-je and Tong-yeong from Mar, 2006 to Apr, 2010. The obtained results are as follows; Catch per unit area (Number) of the Proto type net and Grid type net were $0.18/m^2$, $0.23/m^2$, respectively. The Grid type demonstrated 2.4% lower bycatch rate than the proto type (6.6% vs 4.2%, respectively). In addition, in terms of total weight, the bycatch rate of Grid type was 7.6% lower than the proto type (50.2% vs 42.6%, respectively). In the comparison of shrimp catch, the Proto type demonstrated better haul outcome ($0.02case/m^2$) than the Grid & Window type ($0.02case/m^2$). The Grid & Window net type demonstrated 16.4% lower bycatch rate than the Proto type (32.2% vs 48.6%, respectively). In addition, in terms of total weight, the bycatch rate of Grid & Window net type was 8.3% lower than the Proto type (85.9% vs 94.2% respectively).

Keywords

Grid net type;Window net type;Proto type

References

  1. Broadhurst MK and Kennelly SJ. 1994. Reducing the bycatch of juvenile fish (mulloway) in the Hawkesbury River prawn-trawl fishery using square-mesh panels in codends. Fish Res 19, 321-331. https://doi.org/10.1016/0165-7836(94)90047-7
  2. Broadhurst MK, Kangas MI, Damiano C, Bickford SA and Kennelly SJ. 2002. Using composite square-mesh panels and the Nordmore-grid to reduce bycatch in the Shark Bay prawn-trawl fishery, Western Australia. Fish Res 58 (3), 349-365. (doi:10.1016/S0165-7836(01)00390-3) https://doi.org/10.1016/S0165-7836(01)00390-3
  3. Broadhurst MK, Millar RB, Kennelly SJ, Macbeth WG, Young DJ and Gray CA. 2004. Selectivity of conventional diamond and nove square-mesh codends in an Australian estuarine penaeid-trawl fishery. Fish Res 67, 183-194. (doi:10.1016/j.fishres.2003.09.043) https://doi.org/10.1016/j.fishres.2003.09.043
  4. Cha BJ, Cho SK, Ahn HC and Kim IO. 2012. Development of a bycatch reduction device (BRD) for shrimp beam trawl suing flexible materials. Iran J Fish Sci 11(1), 89-104.
  5. Day G and Eayars S. 2001. NPF operators make gains in bycatch reduction but problems remain! Professional Fisherman 23, 18-19.
  6. Depestele J, Desender M, Benoit HP, Polet H and Vincx M. 2014. Short-term surival of discarded target fish and non-target invertebrate species in the "eurocutter" beam trawl fishery of the southern North Sea. Fish Res 154, 82-72. (doi:10.1016/j.fishres.2014.01.018) https://doi.org/10.1016/j.fishres.2014.01.018
  7. Eayrs S, Rawlinson S and Brewer D. 1997. Reducing bycatch in Australia's Northern Prawn Fishery. Asia-Pacific Fishing 97, Conference papers. Baird Publications, pp. 97-105.
  8. Fonseca P, Campos A, Larsen PB, Borges TC and Erzini K. 2005. Using a modified Nordmore grid for by-catch reduction in the Portuguese crustacean-trawl fishery. Fish Res 71, 223-239. (doi:10.1016/j.fishres.2004.08.018) https://doi.org/10.1016/j.fishres.2004.08.018
  9. Jang CS, Cho YH, Lim CR, Kim BY and An YS. 2009. An analysis on catch of the shrimp beam trawl fishery in Korea coastal sea. J Kor Fish Soc Tech 45(1), 1-13. (doi:10.3796/KSFT.2008.45.1.001) https://doi.org/10.3796/KSFT.2008.45.1.001
  10. Jang CS, Cho YH, and An YS. 2014. Opening efficiency and selectivity of Double-level type and Grid type in the shrimp beam trawl net. J Kor Fish Soc Tech 50(3), 351-360. (doi:10.3796/KSFT.2014.50.3.351) https://doi.org/10.3796/KSFT.2014.50.3.351

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  1. Distribution and Seasonal Changes of Fisheries Resources in the Gwangyang bay vol.30, pp.6, 2018, https://doi.org/10.13000/JFMSE.2018.12.30.6.2163