Green Global
Foundation   Journal
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POLYCULTURE AND INTEGRATED CULTURE PATTERN OF FRESHWATER PRAWN IN FRESH TO HYPOSALINE WATER (Pages : 23 - 27)

The study was conducted in polyculture and integrated culture farms, six in each at Fakirhat upazilla under Bagerhat district during March to September 2006. In Bagerhat region prawn (galda, Macrobrachium rosenbergii) polyculture was practiced with penaeid shrimp (bagda, Peneaus monodon) and carps like rohu (Labeo rohita), catla (Catla catla), silver carp (Hypophthalmichthys molitrix) and mrigal (Cirrhinus cirrhosus) in fresh to hypo-saline water (0-3 ppt). Some farmers were also practicing integrated culture of all these polycultured species with low salinity tolerant paddy (BR-23; BRRI-27, 40,41) and vegetables on the dike. The study was aimed to focus the cost-benefit effectiveness of galda-bagda-carps polyculture and integrated culture in fresh to hypo-saline water. The size of the surveyed farms varied from 0.67 to 2 ha. The range of stocking density of galda, bagda, rohu, catla, silver carp and mrigal were 6000-9000, 17000-19000, 400-800, 550-700, 350-650 and 400-600 per hectare respectively in polyculture; and 5000-7000,12500-15000, 300-450, 250-400, 180-300 and 200-350/ha respectively in integrated culture. The farmers usually used rice bran, wheat bran, master oil cake, soybean meal, snail meat, low cost rice etc. The production of macrobrachium rosenbergii, penaeus monodon, labio rohita, catla catla, silver carp and mrigal were 120, 137, 65, 57, 35 and 31kg/ha respectively in polyculture; and 101, 117, 36, 32, 34 and 25kg/ha respectively in integrated culture. In addition, in the integrated culture, the production of paddy and vegetables were 2446 and 634kg/ha respectively. The net profit of polyculture and integrated culture were 65,306.00 and 67,038.00Tk1 /ha respectively. The study revealed that both culture systems were profitable. It is concluded that farmers can contribute in the national economy by adopting different types of culture practice depending on their available facilities. Download