Effect of stocking densities on the growth, survival and production of kalibaus, Labeo calbasu fry and fingerlings were tested in a single-stage nursery rearing system. The experiment was conducted for a rearing period of six weeks in nine earthen nursery ponds having an area of 0.028 ha each. Four-day-old hatchlings stocked at 0.6 million/ha were designated as treatment T , 1 0.8 million/ha as treatment T and 1.0 million/ha as treatment T . At stocking, all hatchlings were 2 3 of the same age with a mean length and weight of 6.50±0.01cm and weight of 0.007±0.00g, respectively. Physico-chemical parameters and plankton populations were at the optimum level for the culture period. Highest weight gain was observed in treatment T and lowest in treatment 1 T Final length, final weight and survival of fingerlings also followed the same trends as weight 3. gain. Fingerlings in treatment T produced significantly higher specific growth rate than treatment 1 T and T . Feed conversion ratio was significantly higher in treatment T followed by T and T . 2 3 1 2 3 Significantly higher number of fingerlings was produced in treatment T than in T and T . Overall, 3 2 3 highest growth, survival and net benefits of fingerlings were obtained in the treatment T1 at a density of 0.6 million hatchlings/ha. Therefore, of the three stocking densities, 0.6 million hatchling/ha appears to be the most suitable stocking density for nursing and rearing of L. calbasu fry and fingerlings.