Population Dynamics and Sexual Maturity of the Mysid Neomysis japonica (Ishikawa and Oshima, 1951) in a Shrimp Farm in Korea

대하 양식장에 서식하는 곤쟁이 Neomysis japonica (Ishikawa and Oshima, 1951)의 개체군 역학과 성 성숙

  • Ma, Chae-Woo (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Lim, Sung-Do (Department of Marine Biotechnology, Soonchunhyang University) ;
  • Park, Won-Gyu (Department of Marine Biotechnology, Soonchunhyang University)
  • 마채우 (순천향대학교 해양생명공학과) ;
  • 임성도 (순천향대학교 해양생명공학과) ;
  • 박원규 (순천향대학교 해양생명공학과)
  • Published : 2009.02.25


Population dynamics and sexual maturity of Neomysis japonica (Ishikawa and Oshima, 1951) were investigated from a shrimp farm in Tae-an, Korea. N. japonica was collected monthly at the shrimp farm belonging to the Marine and Fisheries Research Institute, the Soonchunhyang University from October 2002 to September 2003. The proportion of female was higher than that of male. The mean carapace length of male (2.42 mm) was larger than that of female (2.31 mm). Brood size increased with increasing female body size. The size of N. japonica at 50% sexual maturity was approximately 4.4 mm. N. japonica females grew faster and reached larger size than males. The mortality rate (z) calculated by length-converted catch curves was $3.46\;yr^{-1}$. The annual recruitment pattern of N. japonica had two major peaks. Log-transformed total length was significantly related with log-transformed carapace length.


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