author(s)
Parishmita Handique, Hemanta Pokhrel, Binod Kalita, Kaustubh Bhagawati and Arnab Narayan Patowary

abstract
The present experiment was conducted for 45 days to evaluate the effect of dietary selenium on haematological parameters. Experiment was conducted in glass aquariums of size 0.75 m X 0.45m X 0.45m. All treatments were carried out in triplicates. Four numbers of experimental selenium incorporated diets were prepared including control which are as follows Control (0 mg organic selenium/kg of diet), T₁ (2.5 mg organic selenium/kg of diet), T₂ (5.0 mg organic selenium/kg of diet) and T₃ (10 mg organic selenium/kg of diet). During the experiment, the water quality parameters (temperature, DO, pH, conductivity, hardness, ammonia, nitrate and nitrite) were found to be insignificant (P<0.05) among all the treatments. RBC’s count in T₁ (4.90 million/mm3) was significantly (P<0.05) higher than Control and T₃. The value of WBC’s count in T₁ (1.58 thousands/mm3) was significantly (P<0.05) higher from that of T₂ and T₃. Haemoglobin level in T₁ (6.41 g/dl) was also significantly (P<0.05) higher from T₃. (185.88%). The result of the present study indicated that the experimental diet containing 2.5 mg organic selenium/kg of diet appears to be suitable for improved haematological parameters compared to the other treatments.