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

다국어 초록 (Multilingual Abstract)

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 f lounder. A porphyra-originated glycoprotein (P) was extracted using sequential processes of water and ethanol treatment. P extracts were added to a f ishmeal-based diet at concentrations of 0.0, 0.5, and 1.0% (designated as Con, P0.5, and P1.0, respectively). Fish were fed one of the three experimental diets for 10 weeks. All f ish groups exhibited over 96.7% survival during the experimental period. Results indicated that the f ish fed diets containing P showed an increase in growth performance, including enhanced weight gain, specif ic growth rate, and feed eff iciency. An increase in insulin-like growth factor (IGF-1) was observed in the f ish fed the P1.0 diet, as compared to those fed Con. At the end of the 10-week feeding trial, all f ish 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 f ish 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 f lounder juveniles.

참고문헌 (Reference)

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