한국양식학회지 (Journal of Aquaculture)

한국양식학회 (The Korean Society of Fisheries and Aquatic Science)
권호 표지

건조 pellet 사료의 단백질 및 지질 함량이 넙치의 성장 및 체성분에 미치는 영향

Effects of Protein and Lipid Levels of Extruded Pellet on Growth and Body Composition of Flounder, Paralichthys olivaceus

  • 최진 (강릉대학교 해양생명공학부) ;
  • 서주영 (강릉대학교 해양생명공학부) ;
  • 이충열 (강릉대학교 해양생명공학부) ;
  • 김경덕 (국립수산과학원 양식사료연구센터) ;
  • 강용진 (국립수산과학원 양식사료연구센터) ;
  • 이상민 (강릉대학교 해양생명공학부)
  • Choi, Jin (Faculty of Marine Bioscience & Technology Kangnung National University) ;
  • Seo, Joo-Young (Faculty of Marine Bioscience & Technology Kangnung National University) ;
  • Lee, Choong-Ryul (Faculty of Marine Bioscience & Technology Kangnung National University) ;
  • Kim, Kyoung-Duck (Aquafeed Research Center, National Fisheries Research and Development Institute) ;
  • Kang, Yong-Jin (Aquafeed Research Center, National Fisheries Research and Development Institute) ;
  • Lee, Sang-Min (Faculty of Marine Bioscience & Technology Kangnung National University)
  • 발행 : 2006.11.25
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초록

넙치 치어용 건조사료의 적정 단백질 및 지질 함량을 조사하기 위하여 사료의 단백질 함량을 50% 및 55%로 조절하고, 각 단백질 함량에 지질 함량을 8%, 12% 및 15%로 조절하여 6종류의 실험 EP 사료를 제조하였다. 21 g의 넙치 치어를 300 L 수조에 3반복으로 무작위로 수용하여, 평균 수온 $20\;^{\circ}C$에서 1일 2회 만복으로 EP 사료를 9주간 공급하였다. 사육실험 결과, 생존율, 증중률 및 일일사료섭취율은 사료의 단백질 및 지질 함량에 영향을 받지 않았다(P>0.05). 사료효율과 단백질효율은 사료의 지질 함량에 유의하게 영향을 받았으며(P<0.001), 사료 지질 함량이 증가함에 따라 증가하는 경향을 보였다. 사료효율은 단백질 50%에 지질 15% 공급구와 단백질 55%에 지질 15% 공급구 사이에 유의차는 없었지만, 다른 실험사료 공급구보다 높았다(P<0.05). 단백질효율도 사료효율과 유사한 경향을 보였고, 단백질 55%에 지질 15% 공급한 실험구가 단백질 50%에 지질 8%, 단백질 55%에 지질 8% 및 지질 12% 공급구보다 높았다(P<0.05). 어체 간의 수분, 단백질 및 지질 함량은 사료의 지질 함량에 유의하게 영향을 받았다(P<0.01). 근육의 일반성분은 실험구간에 유의차가 없었다(P>0.05). 이상의 결과로부터, 본 실험에 적용된 사육조건에서 넙치 치어용 EP 사료의 단백질 함량이 $50{\sim}55%$일 때, 지질 함량을 높여주는 것이 사료이용 효율을 개선시키는데 도움이 될 것으로 판단된다.

This study was conducted to investigate the effects of protein and lipid levels of extruded pellet on growth and body composition of juvenile flounder. Six extruded dry pellets were formulated to contain two protein levels (50 and 55%) and three lipid levels (8, 12 and 15%). Triplicate groups of fish (initial mean weight 21 g) were hand-fed to apparent satiation two times a day for 9 weeks. Survival, weight gain and daily feed intake were not significantly affected by dietary protein and lipid levels. Feed efficiency and protein efficiency ratio were significantly (P<0.001) affected by dietary lipid level, and tended to increase as dietary lipid level increased. Feed efficiency ratio of fish fed the 55% protein diet with 15% lipid was not significantly different from that of fish fed the 50% protein diet with 15% lipid, but significantly (P<0.05) higher than that of fish fed the other diets. Protein efficiency ratio of fish fed the 55% protein diet with 15% lipid was significantly (P<0.05) higher than that of fish fed the 50% protein diet with 8% lipid and 55% protein diets with $8{\sim}12%$ lipids. The contents of moisture, crude protein and lipid in the liver was significantly (P<0.01) affected by dietary lipid level. The results of this study indicate that an increase in lipid level at 50-55% protein in extruded pellet can improve feed efficiency for juvenile flounder.

키워드

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