Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Age and Growth of Brown Croaker Miichthys miiuy in the South-western Water of Korea

한국 서남해 민어(Miichthys miiuy)의 연령과 성장

  • Lee, Seung Hwan (Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Chung, Sang Deok (Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Yoo, Joon-Taek (Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Yeong Hye (Fisheries Resources and Environment Division, South Sea Fisheries Research Institute, National Institute of Fisheries Science)
  • 이승환 (국립수산과학원 남해수산연구소 자원환경과) ;
  • 정상덕 (국립수산과학원 남해수산연구소 자원환경과) ;
  • 유준택 (국립수산과학원 남해수산연구소 자원환경과) ;
  • 김영혜 (국립수산과학원 남해수산연구소 자원환경과)
  • Received : 2017.02.02
  • Accepted : 2017.03.15
  • Published : 2017.03.31
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Abstract

Age and growth of Brown croaker Miichthys miiuy were estimated using right sagittal otoliths of 327 fish specimens from August 2015 to July 2016 in Korea. Annual rings in otoliths were formed from March to June once a year. The oldest specimens were 11 yr in female and 9 yr in male. Brown croaker began spawning in September and showed a peak in October. Total length and body weight relationships showed no significant difference between females and males (P>0.05), and can be expressed as $BW=1.15{\times}10^{-5}{\times}TL^{2928}$ ($R^2=0.98$). Estimated von Bertalanffy growth curve was $L_t=182.4(1-e^{-0.067(t+1.754)})$ ($R^2=0.96$).

본 연구는 우리나라 주요 수산자원 중 하나인 민어의 이석을 이용하여 민어의 연령과 성장을 추정하였다. 연구에 사용된 민어의 이석은 2015년 8월부터 2016년 7월까지 서해 남부 연안에서 안강망으로 어획되어 양육된 것으로 총 339개체 중, 연령사정에 이용된 개체수는 327미였다. 연령은 민어는 불투명대에서 투명대로 이행하는 지점을 윤문으로 간주하였으며, 윤문형성시기는 3~6월(주형성시기 6월), 산란기는 9~10월 (주산란기 9월)로 추정되어 초륜이 형성되기까지의 기간은 0.75년으로 나타났다. 최고 연령은 암컷 11세, 수컷 9세로 추정되었으며, 윤문이 형성될 시기의 평균 전장을 바탕으로 비선형 회귀방법으로 추정한 Von Bertalanffy 성장식은 $L_t=182.4(1-e^{-0.067(t+1.754)})$($R^2=0.96$)이었다.

Keywords

References

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