Hematological indices of Caspian white fish fed diets enriched with different levels
of Mentha piperita (control, 0%, 1%, 2% and 3%) for 8 weeks. Data are presented as
mean ± S.D. Data in the same columns with different superscript are significantly
different (P < 0.05).RBC, red blood cells; WBC, white blood cells; Ht, hematocrit; Hb, haemoglobin
concentration.