Evaluation of brewers spent grains with different levels of exogenous enzymes on the production performance and body composition of Nile tilapia (Oreochromis niloticus) and channel catfish (Ictalurus punctatus).

Autor: Tidwell, James H., Coyle, Shawn D., Rossi, Waldemar, Rucker, Kalvin
Předmět:
Zdroj: Journal of Applied Aquaculture; 2023, Vol. 35 Issue 2, p257-272, 16p
Abstrakt: This study evaluated Brewers Spent Grains (BSG) and an enzyme additive (AllzymeTM; ENZ) in practical diets for juvenile (~5 g/fish) Nile tilapia (Trial 1) and channel catfish (Trial 2). Following a factorial arrangement, effects of three dietary levels of BSG (0, 270, and 550 g/kg) and three levels of ENZ (0, 0.2, and 0.4 g/kg) on production performance and whole-body composition of the fish were evaluated. Upon conclusion of the feeding trials, no effects of ENZ, or interactions between BSG and ENZ, were found. Fish survival was >85% and unaffected by diet. Reduced growth of tilapia (from 949% to 778%) and catfish (from 1802% to 1364%) as dietary BSG increased from 0 to 550 g/kg were observed. In these trials, weight gain was reduced in both channel catfish and tilapia at BSG inclusion rates of ≥270 g/kg and that the addition of exogenous enzymes did not improve BSG utilization. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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