Growth, Yield and Returns to Puntius sarana (Hamilton) Sarpunti, in Bangladesh under Semi intensive Aquaculture

摘要

Production potential of Sarpunti, Puntius sarana in polyculture with Indian and exotic major carps were assessed at a stocking density of 9880 ha'' in the treatment of T_1, T_2, T_3 and T_5 and in monoculture at 24700 ha~(-1) in the treatment of T_4 for a period of one year in different fish seed multiplication farms of greater Mymensingh district, Bangladesh. Treatment T_1 was designed with Catla catla, Hypophthalmichthys molitrix, Labeo rohita, Cirrhina mrigala and P. sarana, treatment T_2 contained C. catla, L. rohita, C. mrigala and P. sarana, treatment T_3 was designed without C. catla, treatment T_4 comprised of only P. sarana and treatment T5 was designed without P. sarana. Sarpunti was stocked at densities of 2964, 3458, 3458 and 24700 ha~'in treatments T_1, T_2, T_3 and T_4, respectively. Fish production in treatments T_1,T_2,T_3,T_4 and T_5 were 4818.88,4199.93,4305.12,3851.21 and4174.19 kg ha~(-1) yr~(-1), respectively where P. sarana contributed to 9.22, 12.18, 10.92 and 100% to the total yield. The mean differences of gross yield among different treatments were significant (P<0.05). The physico-chemical and biological factors were found to be in suitable level for fish culture. Despite the yield values, it is advocated that carps-P.sorona polyculture technology is a good proposition as an aquaculture technology to save the fish from being endangered and enhance the nutritional and socio-economic status of the rural people.