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Effect of Soybean-curd Residues in the Formulated Diet on Growth and Body Composition of Juvenile Flounder (Paralicthys olivaceus)

넙치 (Paralicthys olivaceus) 치어용 배합사료에 콩비지 첨가가 성장 및 체성분에 미치는 효과

  • LEE Sang-Min (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • KIM Kyoung-Duck (National Fisheries Research and Development Institute) ;
  • JANG Hyun-Suk (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • LEE Yong-Whan (Faculty of Marine Bioscience and Technology, Kangnung National University) ;
  • LEE Jong Kwan (National Fisheries Research and Development Institute) ;
  • LEE Jong Ha (National Fisheries Research and Development Institute)
  • Published : 2003.12.01

Abstract

This study investigated the effect of soybean-curd residues as an ingredient of the formulated diet for juvenile flounder (Paralichthys olivaceus). Three replicates of juvenile fish (averaging weight $1.5\pm0.04\;g$) were fed one of four isonitrogenous $(50\%)$ diets containing $0\%,\;5\%,\;10\%\;and\;15\%$ soybean-curd residues for 7 weeks. Survival, hepatosomatic index and condition factor of the fish were not affected by dietary soybean-curd residues levels. Weight gain, feed efficiency and protein efficiency ratio of the fish fed the diet containing $5\%$ soybean-curd residues were not significantly different to those of the fish fed the control diet, however these values decreased in the fish fed the $10\%\;and\;15\%$ soybean-curd residues (P<0.05). Daily feed and protein intake increased with increasing dietary soybean-curd residues level. Crude protein and lipid contents in the whole body decreased with increasing dietary soybean-curd residues, but no significant differences were observed among control, $5\%\;and\;10\%$ soybean-curd residues diets (P>0.05). Plasma total protein concentration of fish was affected by dietary soybean-curd residues levels (P<0.05). It is concluded that the soybean-curd residues as a substitute for wheat flour can be included up to $5\%$ in the diet for juvenile flounder.

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