The Effects of Dietary Thyme Oil (Thymus vulgaris) Essential Oils for Common Carp (Cyprinus carpio): Growth Performance, Digestive Enzyme Activity, Antioxidant Defense, Tissue and Mucus Immune Parameters, and Resistance against Aeromonas hydrophila

Table 3

Digestive enzymes activity of common carp fed four experimental diets over 60 days. Values are presented as the mean ± SE.

Parameters	Control	T1	T2	T3
Amylase (U/ml)	2.33 ± 0.10^b	2.58 ± 0.08^ab	2.66 ± 0.07^a	2.71 ± 0.09^a
Lipase (U/ml)	1.70 ± 0.08	1.57 ± 0.07	1.75 ± 0.04	1.82 ± 0.07
Protease (U/ml)	17.56 ± 0.61^b	20.27 ± 0.53^a	21.56 ± 0.90^a	21.74 ± 0.74^a

Different letters (a–b) in the same row indicate significant differences ().