Comparative Study on Growth Performance of Bagda (P. monodon, Fabricius, 1798) in Traditional and Semi-intensive Culture Systems

A comparative study of growth performance of giant tiger shrimp, Penaeus monodon from two traditional and two semi-intensive culture systems was conducted from 14th March to 16th July, 2008 in the village Pania under Kaligonj Upazila of Satkhira district in order to observe the following attributes: stocking density, growth, growth rate, survival rate, production, production rate, production cost, net profit, gross profit and water quality parameters. The average size of the pond in traditional and semi –intensive culture system was 3.80 hector and 0.605 hector respectively. The initial average body weight of shrimp post larvae during stocking was 0.31g and 0.305g in traditional and semi-intensive ponds. During harvest the final average body weight was found 23.95g and 31.75g respectively in traditional and semi-intensive ponds. No nursing was observed either in traditional or semi-intensive ponds. However, fertilizers and supplementary feed were used in semi-intensive culture system after stocking. The pond’s dike system was found stronger in semi-intensive ponds than traditional ponds. The average stocking density of PL in semi-intensive and traditional ponds were 117508 PL/hector and 23377 PL/hector respectively. No apparent variations of water quality parameters were observed in traditional and semi-intensive ponds through out the culture period. Throughout the culture period, the average growth rate was found 0.265 g/day and 0.2 g/day in semi-intensive and traditional culture systems respectively. The average net profit was estimated-12463.5 BDT/hector and 677814.5 BDT/hector in traditional and semi-intensive culture systems respectively. From the above study it is understood semi-intensive culture system is said to be economically, more profitable and feasible than that of the traditional culture system in terms of growth, growth rate, gross and net profit.