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Biomass estimation of sailfin sandfish, Arctoscopus japonicus, in Korean waters

한국 연근해 도루묵, Arctoscopus japonicus의 자원량 추정

  • Lee, Sung-Il (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Yang, Jae-Hyeong (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Yoon, Sang-Chul (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Chun, Young-Yull (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Kim, Jong-Bin (Fisheries Resources and Environment Division, East Sea Fisheries Research Institute, NFRDI) ;
  • Cha, Hyung-Kee (Fisheries Resources Research Division, NFRDI) ;
  • Choi, Young-Min (Fisheries Resources Research Division, NFRDI)
  • 이성일 (국립수산과학원 동해수산연구소 자원환경과) ;
  • 양재형 (국립수산과학원 동해수산연구소 자원환경과) ;
  • 윤상철 (국립수산과학원 동해수산연구소 자원환경과) ;
  • 전영열 (국립수산과학원 동해수산연구소 자원환경과) ;
  • 김종빈 (국립수산과학원 동해수산연구소 자원환경과) ;
  • 차형기 (국립수산과학원 자원연구과) ;
  • 최영민 (국립수산과학원 자원연구과)
  • Published : 2009.10.31

Abstract

Available ecological and fishery data of sailfin sandfish, Arctoscopus japonicus, was examined to ascertain its population dynamic parameters in Korean waters. The instantaneous coefficient of total mortality (Z) was estimated to be 1.361/yr, and annual survival rate (S) was 0.256. The estimated instantaneous coefficient of natural mortality (M) was 0.482/yr, and the instantaneous coefficient of fishing mortality (F) for recent years was calculated to be 0.879/yr from Z and M values. Age at first capture was estimated to be 1.958 years. These parameters, in conjunction with catch landings data between 1991 and 2008, were used to estimate annual biomass using a biomass-based cohort analysis. The biomass of A. japonicus was estimated at approximately 7,600 mt in 1991, but since 1994 decreased to below 4,000 mt by 2001. After 2002 they started to increase gradually, and showed the level of more than 5,000 mt in recent years.

Keywords

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