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

Abstract 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.