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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Size selectivity of the gill net for spinyhead sculpin, Dasycottus setiger in the eastern coastal waters of Korea

동해안 자망에 대한 고무꺽정이 (Dasycottus setiger )의 망목 선택성

  • PARK, Chang-Doo (East Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • BAE, Jae-Hyun (East Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • CHO, Sam-Kwang (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • AN, Heui-Chun (Fisheries Engineering Research Division, National Institute of Fisheries Science) ;
  • KIM, In-Ok (Fisheries Engineering Research Division, National Institute of Fisheries Science)
  • 박창두 (국립수산과학원 동해수산연구소) ;
  • 배재현 (국립수산과학원 동해수산연구소) ;
  • 조삼광 (국립수산과학원 서해수산연구소) ;
  • 안희춘 (국립수산과학원 수산공학과) ;
  • 김인옥 (국립수산과학원 수산공학과)
  • Received : 2016.10.10
  • Accepted : 2016.11.28
  • Published : 2016.11.30
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Abstract

Spinyhead sculpin Dasycottus setiger, a species of cold water fish, is distributed along the eastern coastal waters of Korea. A series of fishing experiments was carried out in the waters near Uljin from June, 2002 to November, 2004, using the experimental monofilament gill nets of different mesh sizes (82.2, 89.4, 104.8, and 120.2 mm) to describe the selectivity of the gill net for the fish. The SELECT (Share Each Length's Catch Total) analysis with maximum likelihood method was applied to fit the different functional models (normal, lognormal, and bi-normal models) for selection curves to the catch data. The bi-normal model with the fixed relative fishing intensity was selected as the best-fit selection curve by AIC (Akaike's Information Criterion) comparison. For the best-fit selection curve, the optimum relative length (the ratio of fish total length to mesh size) with the maximum efficiency and the selection range ($R_{50%,large}-R_{50%,small}$) of 50% retention were obtained as 2.363 and 0.851, respectively. The ratios of body girth to mesh perimeter at 100% retention where the selection curve of each mesh size represented the optimum total length were calculated as the range of 0.86 ~ 0.87.

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References

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