수산해양교육연구 (Journal of Fisheries and Marine Sciences Education)

  • 제26권4호
  • /
  • Pages.859-867
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  • 2014
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  • 1229-8999(pISSN)
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  • 2288-2049(eISSN)
한국수산해양교육학회 (The Korean Society for Fisheries and Marine Sciences Education)
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치어기 황복(Takifugu obscurus) 사료 내 적정 지질 함량

Optimum Dietary Lipid Level in Juvenile River Puffer Takifugu obscurus

  • 투고 : 2014.06.30
  • 심사 : 2014.07.24
  • 발행 : 2014.08.31
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초록

This study was conducted to evaluate the optimum dietary lipid level in juvenile river puffer. Five semi-purified diets were formulated with corn oil to contain graded levels of lipid levels of 6, 9, 12, 15 and 18%. Fish averaging $8.32{\pm}0.02$ g randomly were fed the experimental diets in triplicate groups for 8 weeks. After the 8-weeks feeding trial, weight gain and specific growth rate of fish fed the 9% diet were significantly higher than those of fish fed the 15 and 18% diets (P<0.05) but there was not significantly different from that of fish fed the 6, 9 and 12% diets. Feed efficiency and protein efficiency ratio of fish fed the 6, 9 and 12% diets were significantly higher than those of fish fed the 18% diet (P<0.05). Visceralsomatic index of fish fed 18% diet was significantly higher than that of fish fed the 6% diet (P <0.05) but there was not significantly different from that of fish fed the 9, 12, 15 and 18% diets. No significant differences were observed in condition factor, hepatosomatic index and whole body composition among all the fish groups. Serum cholesterol and triglyceride fish fed of 18% diet were significantly higher than that of fish fed the other diets (P<0.05). Optimum dietary lipid levels by using broken-line model and by using second order polynomial were estimated at 7.01% and 8.98% for the maximum growth of fish respectively. Therefore, these results suggested that the optimum dietary lipid level could be greater than 7.01% but less than 8.98% for the maximum growth in juvenile river puffer.

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참고문헌

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