A few years later, Ogunkoya et al. (2006) evaluated the effects of an
enzyme cocktail (protease and carbohydrases) on growth and waste
outputs of rainbow trout (Oncorhynchus mykiss) fed diets containing
soybean meal at up to 20% of weight. Results fromthat study presented
a statistically significant effect of exogenous enzyme supplementation
on apparent digestibility of dry matter, crude protein, nitrogen-free
extract, phosphorus and gross energy.