Growth and Economic Performances of Macrobrachium rosenbergii (De Man, 1879) Culture in South-West Coastal Region of Bangladesh

Abstract

The growth performance of Macrobrachium rosenbergii (Deman,1879) under different stocking densities was conducted under three treatments each with three replications namely T₁: 10m^-2 T₂: 12m^-2; T₃: 14m^-2 for a period of six months from April to September, 2012 in 9 experimental ponds in Terokhada Upazilla under Khulna district. Supplementary feeds (mustard oil cake (20%), wheat bran (20%), rice bran (20%), fish meal (25%) and maize bran(15%) were used for all stocked individual. Water quality parameters and growth performances were monitored monthly. The mean values of water temperature, transparency, dissolve O₂, pH and salinity were varied from 28.88 ± 0.161±^oC(T₂) to 31.32 ± 0.97±^oC (T₁), 29.73 ± 0.34cm(T₁) to 32.70 ± 0.28cm(T₂), 5.33 ± 0.184mg^-1(T₃) to 6.17 ± 0.13 mg^-1 (T₁), 6.52 ± 0.205(T₂)to 6.79 ± 0.18(T₁) and 13.75 ± 0.16(T₂) to 15.22 ± 0.20(T₁). The weight gain of Macrobrachium rosenbergii were 59.79± 0.15 g(T₁), 50.86±0.14g(T₂),48.78±0.12g(T₃).The survival rate (%) of M. rosenbergii were 75.02±0.577 (T₁), 66.66±0.88 (T₂), 61.01±0.577(T₃) respectively. Yields (Kg ha^-1 6 month^-1) Macrobrachium rosenbergii were 2302.04kg (T₁), 1768.52 kg (T₂), 1393.808 kg (T₃) respectively. Total cost 656000 ± 17480 Tk ha^-1 (T₁), 596120 ± 4520 Tk ha^-1 (T₂) and 549100 ± 9440 Tk ha^-1 (T₃) respectively and total return of different treatments T₁, T₂ and T₃ were 1492400 ± 12800 Tk ha^-1, 1078200 ± 11930 Tk ha^-1 and 806480 ± 9190 Tk ha^-1 respectively. Net benefit were 801900 ± 7340 Tk ha^-1, 49400± 5930 Tk/ha and 288600 ± 13240 Tk ha^-1 in T₁, T₂, T₃ treatments respectively. From these findings, it could be concluded that highest yield was achieved from T₁ and lowest in T₃ which was significantly (P<0.05) different among the treatments where stocking density were less than other treatments.

J. Environ. Sci. & Natural Resources, 9(1): 53-57 2016