ALL-MALE AND MIXED SEX PRAWN (MACROBRACHIUM ROSENBERGII) PRODUCTION UNDER POLYCULTURE WITH CARPS

An experiment was conducted at Dumurpota of Satkhira district for six months to compare the production performance prawn (Macrobrachium rosenbergii) under all-male and mixed sex culture systems with carps (Labeo rohita Catla catla). A total experimental ghers were used two treatments in triplicates: (T1) (T2). In both treatments, prawns stocked a rate 10,000 PL/ha while C. catla L. each 650 fingerlings ha-1. T1, initial average body weight M. rosenbergii, 7.33, 54.83 54.5 g respectively, whereas after 180 days period final weights became 79.33, 256.5 253.47 g, respectively. T2, 55.07 54.17 which resulted 58.67, 258.87 252.57 The prawn, T1 745.97, 160.89 170.17 kg ha-1, that T2 540.81, 159.34 162.98 survival rates found be 91.28%, 89.93% 87.93% those 87.56%, 90.3% 88.3%, It similar but substantially higher than resulting net income difference 77429.40 Tk These results indicate polyculture carps, composition has no effect on carp species stocking all male can significantly increase economic return such type farming.