Effect of isolated bacteria from freshwater prawn intestines on growth and survival rate of lanchester's freshwater prawn (Macrobrachium lanchesteri De Man, 1911)

Abstract

This research aimed to study the effect of isolated bacteria from shrimp intestines (P_NA and P_MRS) and fish pond (F_NA) on body weight gained, length and survival rate of shrimp (M. Lanchesteri). Experiments were randomly planned 3 times by raising shrimps in opaque black plastic basins at density of 3 shrimps per liter. Feeding prawns with equal amount of ready-made shrimp food mixed with bacteria 3 isolates which were P_NA, P_MRS and F_NA. Experiments were divided into 4 sets namely the control, F_NA set, P_NA set and P_MRS set. Body weight and standard length of shrimp were measured every 7 days for 21 days. At the end of the experiment (21days) these shrimp weight increased in each experiment set to be 0.37±0.07, 0.33±0.04, 0.39±0.11 and 0.40±0.08 g respectively. The standard length measured to be 19.56±1.29, 18.76±0.80, 19.90±1.97 and 20.19±1.41 mm. The survival rate at 21 days of the 4 experimental groups were equal to 60% for the control, 80% for F_NA and 100% for P_NA and P_MRS. Analysis of mean variance of weight and length of shrimp fed with ready-made food shrimp mixed with bacteria 3 isolates showed no statistically significant differences (P>0.05).