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Comparative Growth Performance of the Selected and the Non-selected Red Sea Bream (Pagrus major) Lines

선발과 비선발 참돔 (Pagrus maior) 계통의 성장 양상 비교

  • NOH Choong Hwan (Marine Living Resources Research Division, Korea Ocean Research and Development Institute (KORDI)) ;
  • HONG Kyung Pyo (Marine Living Resources Research Division, Korea Ocean Research and Development Institute (KORDI)) ;
  • OH Sung-Yong (Marine Living Resources Research Division, Korea Ocean Research and Development Institute (KORDI)) ;
  • CHOI Hee Jung (Marine Living Resources Research Division, Korea Ocean Research and Development Institute (KORDI)) ;
  • PARK Yong Joo (Marine Living Resources Research Division, Korea Ocean Research and Development Institute (KORDI)) ;
  • MYOUNG Jung Goo (Marine Living Resources Research Division, Korea Ocean Research and Development Institute (KORDI)) ;
  • KIM Jong Man (Marine Living Resources Research Division, Korea Ocean Research and Development Institute (KORDI))
  • 노충환 (한국해양연구원 해양생물자원연구본부) ;
  • 홍경표 (한국해양연구원 해양생물자원연구본부) ;
  • 오승용 (한국해양연구원 해양생물자원연구본부) ;
  • 최희정 (한국해양연구원 해양생물자원연구본부) ;
  • 박용주 (한국해양연구원 해양생물자원연구본부) ;
  • 명정구 (한국해양연구원 해양생물자원연구본부) ;
  • 김종만 (한국해양연구원 해양생물자원연구본부)
  • Published : 2004.10.01

Abstract

Growth performances of the selected and the non-selected red sea bream (Pagrus major) lines were evaluated up to marketable size. The offspring were mass-produced either from the selected line (the fourth generation of broods from mass selection) or the non-selected line (the second generation of wild broods). Early (59 to 103 days old, trial I) and late growth performances (4 to 24 months old, trial II) were evaluated based on communal rearing in land-based tanks and sea cages, respectively. In trial I, the selected line exhibited significantly higher values in both weight gain (WG) and specific growth rate (SGR) when compared to those observed in the non-selected line (P<0.05). In trial II comprising of three growth phases (4-9, 9-16 and 16-24 months old), selected line showed only slightly improved in WG and SGR at the beginning two growth phases (4-9 and 9-16 months old) (P>0.05), however, displayed significantly higher values at the last growth phase (16-24 months old) (P<0.05). Overall WG and SGR throughout the experiment (4-24 months) were also significantly higher in the selected line than the non-selected line (P<0.05). Consequently, mean body weight of the selected line at 24 months old was 1.4-fold (40.8{\%}\;increased) as compared to that of the non-selected line. This present result indicates that mass selection of this species against the growth traits might be quite effective, and the present advance has important Implication in the productivity enhancement of red sea bream aquaculture.

Keywords

Pagrus major;Red sea bream;Selective breeding;Growth performance;Selection response;Communal rearing

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