Use of Ocimum sanctum L. (Tulsi) as dietary supplement and its effect on growth and biochemical parameters in Labeo rohita (Hamilton, 1822)

The present study investigates the effect of Ocimum sanctum (Tulsi) as dietary supplement on growth and biochemical response in Labeo rohita fingerlings. Fingerlings of about 18±1 (g) were fed with a diet containing 0% (control), 1% (T1), and 3% (T2) of Tulsi diet. The sampling of the experiment was done on 18 th , 36 th , 54 th , 72 th and 90 th days for growth, biochemical parameters and water quality parameters analysis. The lowest FCR value and significantly higher SGR, FCE, and percentage (%) weight gain were found in T2 group. The alterations in biochemical parameters at the end of 90 th day trial indicated that Ocimum sanctum (Tulsi) administered through feed significantly (p<0.05) enhanced the serum total protein, globulin and albumin content. The physico-chemical parameters like pH, temperature, dissolved oxygen, total alkalinity, ammonia–nitrogen and phosphate-phosphorus were analyzed throughout the experimental period. The result of the present study indicated that all parameters are optimum for fish culture. These results reveal that Tulsi as a dietary supplement diet enhances growth, feed utilization and influences the innate immunity of Labeo rohita fingerlings.