Dietary supplementation of tilapia juveniles reared in bft (bioflocs) tanks with dl-methionine

Abstract The present study aimed at determining the effects of dietary DL-methionine supplementation on water quality, bioflocs composition and Nile tilapia juvenile’s (initial body weight = 2.76 ± 0.06 g) growth performance in BFT rearing tanks (18 fish/100-L tank). Fish were or not subjected to artificial feed restriction. experimental treatments consisted two control groups: 1 - no restriction, methionine supplementation; 2 restriction 25%, supplementation. There also four treated 0.5%; 1.0%; 3 2.0%; 4 molasses 1.0. Supplementation commercial diet with has affected either quality proximate bioflocs. After 8 weeks, gain fish reared 1% 2% differed (P>0.05) from without In conclusion, it is possible restrict daily allowances juveniles impairment, if a minimal 1.0% given.