Abstract
Freshwater aquaculture is by far the most ancient aquatic living resource production system known in the world. An experiment was conducted to evaluate the growth performance of prawn and tilapia (male) under different sex (male and female) contribution of prawn in polyculture ponds for a period of four months from September 2010 to December 2010. The experiment was designed with 3 treatments like T1 (All male Tilapia 4938/ha + All male Prawn 19,753/ha), T2 (All male Tilapia 4938 / ha + All female Prawn 19,753/ha) and T3 (All male Tilapia 4938/ decimal + all male Prawn 19876 + all female prawn 19876/ha), each with 2 replications. The mean stocking weight of prawn was 2.87 g and that of tilapia was 37.36 g. Total stocking density of prawn and tilapia (24,691/ha), basal fertilization (Cowdung 2470kg/ha, Urea 50kg/ha and TSP 50kg/ha), periodic fertilization (Cowdung 50kg/ha/day, urea 1.25kg/ha/day and TSP 1.25kg/ha/day) and feeding regime (diet containing 30% protein level at the rate of 2-5% of prawn and fish body weight twice daily) were same for all the treatments. Water quality parameters (water temperature, transparency, dissolved oxygen, pH, NH3-N and alkalinity) were monitored fortnightly and the growth parameters were monitored monthly. Mean values of water quality parameters were found within the suitable range. Treatment T1 varied more significantly (P<0.05) than that of others for the mean values of growth parameters (final weight, weight gain, SGR, survival rate and yield) of prawn and tilapia.Asian J. Med. Biol. Res. June 2017, 3(2): 198-204
Highlights
Semi-intensive culture has been the most common production system for M. rosenbergii in Southeast Asia (Lee and Wickins, 1992; D’Abramo and New, 2000)
In case of M. rosenbergii, SGR (%, bwd-1) varied from 2.76±0.63 (T1) to 2.97±0.53 (T3) and of O. niloticus varied from 1.66±0.51 (T2) to 1.71±0.53 (T3)
The survival rate of O. niloticus varied from 72.50±2.50% (T3) to 87.50±2.50% (T1)
Summary
Semi-intensive culture has been the most common production system for M. rosenbergii in Southeast Asia (Lee and Wickins, 1992; D’Abramo and New, 2000). Within the overall agro-based economy in Bangladesh, freshwater prawn farming has become an important subject to the rural peoples for their livelihood, to the enterprises and its development has attracted considerable attention for its export potential and to the researchers for searching new technologies in Bangladesh. Despite the growth of this sector, a number of issues are important for freshwater prawn farming in Bangladesh including production technology, socio-economic and environmental aspects- all of these are important parameters of sustainability. Mixed culture of all male prawn with all male tilapia is found more feasible over the monoculture technique because monoculture of prawn possesses a number of problems. The production technology of all male prawn with all male tilapia culture is not practiced with a long history as compared to the indigenous technology of gher farming developed in southwestern Bangladesh.
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