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Age and growth of the black rockfish, Sebastes inermis, in the Jeonnam marine ranching area in the southern Sea of Korea

한국 남해 전남바다목장해역 볼락, Sebastes inermis의 연령과 성장

  • Kim, Hee-Yong (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Kim, Sang-Hwa (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Huh, Sun-Jung (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Seo, Young-Il (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Lee, Sun-Gil (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Ko, Jun-Chul (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Cha, Hyung-Kee (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI) ;
  • Choi, Mun-Sung (Fisheries Resources and Environment Division, Southwest Sea Fisheries Research Institute, NFRDI)
  • 김희용 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 김상화 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 허선정 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 서영일 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 이선길 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 고준철 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 차형기 (국립수산과학원 남서해수산연구소 자원환경과) ;
  • 최문성 (국립수산과학원 남서해수산연구소 자원환경과)
  • Received : 2010.09.24
  • Accepted : 2010.11.10
  • Published : 2010.11.30

Abstract

Characteristics of age and growth of the black rockfish, Sebastes inermis sampled in the Jeonnam Marine Ranching Area (JMRA) around Geumo Islands south of Yeosu were investigated using 642 otoliths from March 2009 to February 2010. The opaque zone was formed in September once a year and hence it was used as an annulus. The parturient period was December to January, and therefore the duration from fertilization to the complete formation of the opaque zone was nineteen months. From the parameters calculated using the average length when the year ring was formed, growth of S. inermis were expressed by von Bertalanffy growth equation as $L_t$=23.267 ($1-e^{-0.4406(t+1.1971)}$) for females and $L_t$=22.030 ($1-e^{-0.5312(t+0.6834)}$) for males when is total length in age t. Through the growth equations, the maximum length was determined as 23.27cm for females and 22.03cm for males and the growth factor as 0.4406/yr and 0.5312/yr, respectively. Finally, the growth of female S. inermis is larger than the one of male S. inermis.

Keywords

Acknowledgement

Grant : 남해연안어업자원조사사업

Supported by : 국립수산과학원

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