The purpose of the present study was to examine the effects of supplementing -glucanase, xylanase and protease alone
or in combination to diets with high inclusion levels of soybean meal, sunflower meal or rapeseed meal on the apparent
nutrient digestibility in rainbow trout. Furthermore, nitrogen mass-balances and energy retentions were evaluated, in spite
of the relatively short duration of the experiments, to elucidate on the potential utilization of digested nutrients and energy.