Effects of vitamins E and Riboflavin (B2) and combinations of them on the hematological parameters of common carp, Cyprinus carpio L., fingerlings

In the present study, the effects of vitamins E, B₂ and combinations of them on hematological parameters of common carp, Cyprinus carpio L., were investigated during a 56-day experiment. The various dietary levels of vitamins E, B₂ and their combination were used as experimental treatments, as follows: T₁: vitamin E (80 mg), T₂: vitamin E (160 mg kg diet^-1), T₃: vitamin E (240 mg kg diet^-1), T₄: vitamin B₂ (7 mg kg diet^-1), T₅: vitamin B₂ (15 mg kg diet^-1), T₆: vitamin B₂ (20 mg kg diet^-1), T₇: vitamin E (80 mg kg diet^-1) + vitamin B₂ (7 mg kg diet^-1), T₈: vitamin E (160 mg kg diet^-1) + vitamin B₂ (15 mg kg diet^-1), T₉: vitamin E (240 mg kg diet^-1) + vitamin B₂ (20 mg kg diet^-1). One group not given vitamin supplements was the control. The values of red blood cells (RBC), hemoglobin (Hb), and hematocrit (Hct) were higher in T₇ than in the other experimental treatments. The values of white blood cells (WBC) were higher in T₂ than in the other treatments. The concentration of immunoglobulin (IgM) was also lower in T₁₀ than in the other experimental treatments. The highest values of mean corpuscular hemoglobin (MCH) and mean corpuscular volume (MCV) were observed in T₂. No significant differences were noted among experimental groups in the values of mean corpuscular hemoglobin concentration (MCHC). This study showed that vitamin E and B2 supplements alter the hematological parameters of common carp.