Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Effect of Size Grading on Growth and Sex Ratio of Parrot Fish (Oplegnathus fasciatus)

동일연령군중 개체크기별로 나눈 돌돔 (Oplegnathus fasciatus)의 성장과 성비의 비교

  • KIM Jong Hyun (Fish Genetics and Breeding Research Center, National Fisheries Research and Development Institute) ;
  • BANG In Chul (Department of Marine Biotechnology, Soonchunhyang University) ;
  • CHO Jae Kwon (South Sea Fisheries Research institute, National Fisheries Research and Development Institute) ;
  • BAEK Jae Min (South Sea Fisheries Research institute, National Fisheries Research and Development Institute)
  • 김종현 (국립수산과학원 어류육종연구센터) ;
  • 방인철 (순천향대학교 해양생명공학과) ;
  • 조재권 (국립수산과학원 남해수산연구소) ;
  • 백재민 (국립수산과학원 남해수산연구소)
  • Published : 2004.06.01
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Abstract

Juveniles of parrot fish (Oplegnathus fasciatus) were graded and divided into three groups (mean initial size): Small group $(32.9\pm3.2\;g),$ Large group $(130.1\pm12.3\;g)$ and Ungraded group $(74.8\pm29.8\;g).$ Growth and sex ratio were monitored over 3 years. It was concluded that no production advantage was gained by weight grading. There were no differences when the pooled data from the two graded groups were compared with the ungraded group, although mean weight and survival of the large group were continuously higher than those of other groups until the end of rearing period. The highest percentage of males was found in the large group. These results show that males start growing faster than females long before the size grading.

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References

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