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Mesh selectivity of a dome-shaped pot for finely-striate buccinum Buccinum striatissimum in the eastern coastal waters of Korea

반구형 통발에 대한 물레고둥 (Buccinum striatissimum)의 망목 선택성

  • Park, Chang-Doo (Fisheries system engineering Division, NFRDI) ;
  • Bae, Jae-Hyun (Aquaculture Industry Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Cho, Sam-Kwang (Fisheries system engineering Division, NFRDI) ;
  • Kim, In-Ok (Aquaculture Industry Division, West Sea Fisheries Research Institute, NFRDI)
  • 박창두 (국립수산과학원 시스템공학과) ;
  • 배재현 (국립수산과학원 동해수산연구소) ;
  • 조삼광 (국립수산과학원 시스템공학과) ;
  • 김인옥 (국립수산과학원 서해수산연구소)
  • Received : 2014.07.05
  • Accepted : 2014.08.14
  • Published : 2014.08.31

Abstract

Finely-striate buccinum Buccinum striatissimum, a species of whelks, is caught mainly by pot in the eastern coastal waters of Korea. In order to determine the size selectivity of pot for the species, comparative fishing experiments were conducted near Yeongil Bay from June to September in 2003 using the dome-shaped pots with different five mesh sizes (17.1, 24.8, 35.3, 39.8, and 48.3 mm). The parameters of logistic equation were estimated by the SELECT (Share Each Length's Catch Total) method based on a multinomial distribution. The model with the estimated split parameter was found to fit the catch data best. The master selection curve was estimated to be s (R)=exp (13.044R-16.438)/[1 + exp (13.044R-16.438)], where R is the ratio of shell height to mesh size. The relative shell height of 50% retention was 1.260, and the selection range was 0.168. Enlargement in mesh size of the pot allows more small-sized whelks to escape.

Keywords

Whelk;Finely-striate buccinum;Pot;Selectivity;Selection curve;SELECT method;Buccinum striatissimum

Acknowledgement

Supported by : 국립수산과학원

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