COST/ECONOMIC BENEFIT BY APPLICATION OF Fish Grower (HATCHERY MODEL) (Figures based on the study made at Kadiam Farm, Andhra Pradesh )  

IMC Variety	Female Brooder(kg.)	Dosage (ml)	Eggs Released (in lakhs)	% of Fertilization	No. of Spawn Produced(in lakhs)	Fecundity Realized	REMARKS
MRIGAL Control Experiment Difference	18.100 17.300 0.800	9.05 (0.5x18.1) 7.785 (.45x17.3) 1.265	20.00 30.00 10.00* *proportionate to control 19.116 lack Net extra production=10.8 lack	75% 90% 15%	15.00 23.00 8.00* *proportionate to control 14.337lack. Net extra production = 8.663 lack Assuming spawn rate @ Rs. 400/- per lack = Benefit Rs.3,465.20	In Lack 1.10 1.73 0.63	Total Benefit per operation = Rs.3,465/- 1) In normal condition assuming 60 operation per season, Total Benefit = Rs. 2,07900/- 2) With application of Fish Grower operation can be achieved for 75 times Total Benefit = Rs.2,59,875./-A Less cost of Instrument = Rs. 40,000/-= Rs. 2,19875/- Net Profit after recovery of Instrument cost. Hence, Total Gain achievable = 1^st year= Rs. 2,19875/- 2^nd year= Rs. 2,59,875/- 3^rd year= Rs. 2,59,875/- 4^th year =Rs. 2,59,875/- 5^th year= Rs. 2,59,875/- 6^th year= Rs. 2,59,875/- 7^th year= Rs. 2,59,875/- 8^th year =Rs. 2,59,875/- Total Benefit =Rs. 20,39000/-