Table 7.

The intestinal digestive enzyme activities in Nile tilapia-fed diets containing the yeast Saccharomyces cerevisiae for 90 days during the winter season.

Parameters	T1 (control)	T2 (5 g/kg diet)	T3 (10 g/kg diet)	T4 (20 g/kg diet)
Amylase (U/mg)	2.52 ± 0.04b	2.55 ± 0.03ab	2.56 ± 0.01a	2.57 ± 0.01a
Protease (U/mg)	19.97 ± 0.05b	20.01 ± 0.08b	20.03 ± 0.03b	20.10 ± 0.05a
Lipase (U/mg)	54.13 ± 2.79	54.07 ± 1.11	54.52 ± 3.77	55.07 ± 1.07

Note: Data are given as mean ± SD. Different superscript lowercase letters indicate significant differences (p < 0.05).