Effect of different stock density on Giant freshwater prawn (Macrobrachiumrosenbergii, De Man 1879) in earth pond culture

Abstract

To study the effect of different stocking densities on the growth, survival and Feed Conversion Rate (FCR) of the freshwater prawn the post larvae with mean initial weight of 0.18 g and length 2.5 cm were stocked at 5, 10, and 15 PL/m² and cultured for a period of 120 days under earth ponds. Corrects the data on the growth and water quality every 15 days. The results indicated that at low stocking density (5 PL/m²) the growth, survival and production were higher. Prawns attained a final mean body weight and length of 28.35 g. 14.16 cm and 23.27 g. 12.77 cm in low and higher stocking densities, respectively. The highest survival rate was obtained from low stoking density (82.83%) and the lowest survival rate was obtained from high stoking density (72.03%). The FCR were 3.5 and 3.87 for low and high stoking densities respectively. Hence, the growth and survival performance was decreased with increasing stocking density.