Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Effects of Dietary Lipid Level on Growth and Body Composition of Juvenile Red Sea Bream (Pagurus major) during Winter

저수온기 참돔 치어의 성장 및 체조성에 미치는 사료내 지질의 영향

  • 황형규 (국립수산과학원 남해수산연구소) ;
  • 김경덕 (국립수산과학원 양식관리과) ;
  • 박민우 (국립수산과학원 양식관리과) ;
  • 한석중 (국립수산과학원 제주수산연구소) ;
  • 강용진 (국립수산과학원 중앙내수면연구소) ;
  • 김응오 (국립수산과학원 남해수산연구소) ;
  • 김대현 (국립수산과학원 양식관리과)
  • Published : 2009.08.31
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Abstract

This study was conducted to investigate effects of dietary lipid level on growth and body composition of juvenile red sea bream in low temperatures. Duplicate groups of fish (initial body weight of 79 g) were fed one of three isonitronic diets (47% crude protein) containing different lipid levels (10%, 17% and 22%) for 25 weeks during the winter season. Weight gain and survival of fish fed 17% lipid diet were significantly (P<0.05) higher than those fish fed the 10% or 22% lipid diet. Protein efficiency ratio, daily feed intake, condition factor, hepatosomatic index and viscerasomatic index were not affected by dietary lipid level, but feed efficiency of fish fed 10% lipid diet was significantly (P<0.05) lower than those fish fed the 17% or 22% lipid diet. Proximate composition of the whole body, liver, viscera and dorsal muscle were not significantly different among all groups except for crude protein content of dorsal muscle. The contents of 16:0, 18:0, 20:4n-3 and 20:5n-3 of the whole body were significantly (P<0.05) affected by dietary lipid level. The results of this study suggest that an increased dietary lipid level from 10% to 17% can improve growth of juvenile red sea bream in low temperature periods.

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References

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