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Size selectivity of a dome-shaped pot for Morotoge shrimp Pandalopsis japonica in the eastern coastal waters of Korea

통발에 대한 물렁가시붉은새우 (Pandalopsis japonica)의 망목 선택성

  • PARK, Chang-Doo (Fisheries System Engineering Division, NFRDI) ;
  • CHO, Sam-Kwang (Fisheries System Engineering Division, NFRDI) ;
  • BAE, Jae-Hyun (Aquaculture Industry Division, East Sea Fisheries Research Institute, NFRDI) ;
  • KIM, Hyun-Young (Research & Development Planning Division, NFRDI) ;
  • CHA, Bong-Jin (Fisheries System Engineering Division, NFRDI)
  • 박창두 (국립수산과학원 시스템공학과) ;
  • 조삼광 (국립수산과학원 시스템공학과) ;
  • 배재현 (국립수산과학원 동해수산연구소) ;
  • 김현영 (국립수산과학원 연구기획과) ;
  • 차봉진 (국립수산과학원 시스템공학과)
  • Received : 2015.07.31
  • Accepted : 2015.08.25
  • Published : 2015.08.31

Abstract

Morotoge shrimp Pandalopsis japonica is caught by pot and others in the eastern coastal waters of Korea. Comparative fishing experiments were carried out in the eastern coast of Korea, using the dome-shaped pots with different five mesh sizes (17.1, 24.8, 35.3, 39.8, and 48.3 mm) in order to estimate the mesh selectivity of the pot for the morotoge shrimp, Pandalopsis japonica. The SELECT (Share Each Length's Catch Total) analysis method was applied to the catch data. The master selection curve of the pot for the shrimp was estimated to be s(R) = exp(15.770R-10.573)/[1+exp(15.770R-10.753)], where R is the ratio of carapace length to mesh size. From the selection curves, the carapace lengths of 50% retention were 11.6, 17.0, 23.9, and 34.1 mm for 17, 25, 35, and 50 mm mesh-size pot, respectively. It means that the pots of larger mesh size allow more shrimp of small size to escape.

Keywords

shrimp;selectivity;Pandalopsis japonica;pot;SELECT

Acknowledgement

Supported by : 국립수산과학원

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