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

The Korean Society of Fisheries and Ocean Technology (한국수산해양기술학회)
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Bycatch and discards of the whelk trap in the Uljin waters, East Sea

동해안 울진해역 원통형과 장구형 고둥통발의 혼획 및 투기 실태

  • An, Heui-Chun (Aquaculture Industry Division, East Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Bae, Jae-Hyun (Aquaculture Industry Division, East Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Park, Jong-Myung (Aquaculture Industry Division, East Sea Fisheries Research Institute, National Fisheries Research & Development Institute) ;
  • Hong, Sung-Eic (Bada Ecology Research) ;
  • Kim, Seong-Hun (Fisheries System Engineering Division, National Fisheries Research & Development Institute)
  • 안희춘 (국립수산과학원 동해수산연구소 해역산업과) ;
  • 배재현 (국립수산과학원 동해수산연구소 해역산업과) ;
  • 박종명 (국립수산과학원 동해수산연구소 해역산업과) ;
  • 홍성익 (바다생태리서치) ;
  • 김성훈 (국립수산과학원 시스템공학과)
  • Received : 2014.10.15
  • Accepted : 2014.11.26
  • Published : 2014.11.30
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Abstract

Experiment was set up to analyze bycatch and discards situation including snow crap Chionoecetes opilio of whelk trap. Four types of trap were used: drum type trap with PE net; drum type trap with PBS net; cylinder type trap with PE net; and cylinder type net with PBS net. Three funnels were attached in drum type trap and two funnels were used in cylinder type trap. A fleet of traps was consisted with one hundred traps. 25 traps of each type were set on a line in repeated sequence. Field experiments were conducted with 6 fishing operations in the Uljin waters, East Sea in July 2014. Catch of target whelks were 173,261 g and catch rate was 48.7% of total catch, while bycatch were 182,571 g, 51.3% of tatal catch. The catch rate of bycatch was 2.6% higher than that of target catch. Bycatch weight of snow crap was the highest as 142,987 g and formed about 40.2% of total catch, followed giant octopus, Enteroctopus dofleini, 31,762 g (8.9%). Bycatch rate of cylinder type trap was 2.3 times higher than that of drum type trap. Discard rate (discard/(discard+landing)) was 43.6%. Discard rate was the highest at cylinder type trap with PBS net as 63.1%, followed cylinder type trap with PE net as 47.9%, drum type trap with PE net as 33.4%, the lowest at drum type trap with PBS net as 22.1%.

Keywords

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