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 5

Hematological indices of common carp fed four experimental diets over 60 days. Values are presented as the mean ± SE.

Parameters	Control	T1	T2	T3
RBC (× 10^6/μl)	1.27 ± 0.04^b	1.44 ± 0.02^a	1.42 ± 0.03^a	1.47 ± 0.04^a
WBC (× 10^3/μl)	4.12 ± 0.05^b	4.44 ± 0.03^a	4.46 ± 0.03^a	4.48 ± 0.03^a
Hct (%)	26.00 ± 0.66^b	31.00 ± 1.15^a	31.66 ± 1.20^a	32.00 ± 1.15^a
Hb (g/dl)	17.07 ± 0.43^b	19.66 ± 0.45^a	19.57 ± 0.51^a	19.79 ± 0.71^a
MCHC (g/dl)	65.79 ± 3.13	63.49 ± 0.88	61.86 ± 0.98	61.97 ± 2.77
MCH (pg/cell)	134.25 ± 4.42	136.71 ± 5.01	137.50 ± 6.90	134.83 ± 5.95
MCV (nm^3)	204.72 ± 9.22	215.60 ± 10.63	222.60 ± 13.68	217.60 ± 1.66

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