Culture Suitability of Macrobrachium rude with Carp Polyculture in Bangladesh

The experiment assessed the production performance of Gura Chingri (Macrobrachium rude) in polyculture systems across different stocking densities over six months from February 2023 to July 2023. Three treatments (T1, T2, and T3), replicated three times each, were implemented, with varying stocking densities for Gura Chingri, Suborno Rui, Catla, and Silver carp. Following stocking, formulated feeds containing 28-30 % protein was administered, initially at 8% of biomass, gradually reduced to 3%. After six months, the highest mean final weights for individual Prawn (1.10±0.10) g, Suborno Rui (445.68±24.6) g, Catla (511.80±15.72) g, and Silver carp (560.15±13.26) g were recorded in the T2 treatment. Suborno Rui exhibited significantly lower growth performance in T1 compared to T2 and T3, while Chingri showed statistically significant higher growth performance in T2 compared to T1 and T3 (p < 0.05). The food conversion ratio (FCR) was significantly lowest in T2 (1.66) and highest in T1 (1.78) (p < 0.05). Additionally, the highest survival rates were observed in T2 for Prawn (62.21%) g, Suborno Rui (98.7%) g, Catla (98.5%) g, and Silver carp (99.82%) g. Based on these findings, carp polyculture can be an effective way for the farmers to achieve optimal production and financial benefits in Gura chingri culture. Further research is needed to develop consistant and environmentaly sustainable culture system of Gura chingri.