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김(Porphyra yezoensis)에서 추출한 당단백질의 사료내 첨가가 넙치(Paralichthys olivaceus) 치어 성장 및 Edwardsiella tarda 저항성에 미치는 영향

Effect of Dietary Glycoprotein Extracted from Porphyra yezoensis on Growth Performance and Resistance against Edwardsiella tarda in Olive Flounder Paralichthys olivaceus Juveniles

  • 김강웅 (국립수산과학원 사료연구센터) ;
  • 최정욱 (부경대학교 식품영양학과) ;
  • 김경덕 (국립수산과학원 사료연구센터) ;
  • 한현섭 (국립수산과학원 사료연구센터) ;
  • 안철민 (국립수산과학원 사료연구센터) ;
  • 이봉주 (국립수산과학원 사료연구센터) ;
  • 최윤희 (부경대학교 수산과학연구원) ;
  • 남택정 (부경대학교 식품영양학과)
  • Kim, Kang-Woong (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Choi, Jeong-Wook (Department of Food Science and Nutrition, Pukyong National University) ;
  • Kim, Kyoung-Duck (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Han, Hyon-Sob (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • An, Cheul-Min (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Lee, Bong-Joo (Aquafeed Research Center, National Fisheries Research & Development Institute) ;
  • Choi, Youn Hee (Fisheries Science Research Center, Pukyong National University) ;
  • Nam, Taek Jeong (Department of Food Science and Nutrition, Pukyong National University)
  • 투고 : 2012.10.08
  • 심사 : 2012.12.07
  • 발행 : 2012.12.31

초록

This study examined the effects of dietary glycoprotein extracted from Porphyra yezoensi on growth performance and resistance against the pathogenic bacteria Edwardsiella tarda in olive flounder. A porphyra-originated glycoprotein (P) was extracted using sequential processes of water and ethanol treatment. P extracts were added to a fish-meal-based diet at concentrations of 0.0, 0.5, and 1.0% (designated as Con, $P_{0.5}$, and $P_{1.0}$, respectively). Fish were fed one of the three experimental diets for 10 weeks. All fish groups exhibited over 96.7% survival during the experimental period. Results indicated that the fish fed diets containing P showed an increase in growth performance, including enhanced weight gain, specific growth rate, and feed efficiency. An increase in insulin-like growth factor (IGF-1) was observed in the fish fed the $P_{1.0}$ diet, as compared to those fed Con. At the end of the 10-week feeding trial, all fish were infected with E. tarda, and accumulated mortality was monitored for 8 days. Fish fed the Con diet exhibited increasing mortality from day 3 to the end of the challenge test, whereas the mortality of P-fed fish ceased at day 5. We suggest that supplementation with P-originated glycoprotein in aquafeed may increase growth performance and resistance against pathogenic bacteria in olive flounder juveniles.

키워드

참고문헌

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