Evaluation of the dietary probiotics isolated from gastro-intestinal tract in eel as the antibiotics replacer in Japanese eel, Anguilla japonica

Seunghan Lee, Youngjin Park, Seonghun Won and Sungchul C. Bai *
Dept. of Fisheries biology / Feeds and Foods Nutritional Research Center (FFNRC)
Pukyong Nat'l University, 599-1, Deayeon-3-dong, Nam-gu, Busan 608-737, Korea
First author: shlee5863@naver.com

An 8-week of feeding trial was conducted to evaluate the effects of dietary 2 different probiotics which were isolated from gastro-intestinal tract (GIT) in eel on growth performance and non-specific immune responses in juvenile Japanese eel, Anguilla japonica. Fish were fed one of the 10 experimental diets; one control, oxytetracycline (OTC) and four different levels of probiotics₁ and probiotics₂. After the feeding trial, WG, SGR, FE, PER were measured and statistically analyzed (P<0.05). Both specific as well as non-specific immune responses were investigated through enzyme analyses like superoxide dismutase (SOD), lysozyme activity, myeloperoxidase (MPO), gene expression and challenge test.