The utilization of photosynthetic bacteria in Thai fairy shrimp (Branchinella thailandensis) culture

Abstract

This research aimed to study the utilization of photosynthetic bacteria (PSB) for Branchinella thailandensis culture. The research had 2 experiments. The objectives were to: 1) study the growth of PSB, 2) study B. thailandensis culture by PSB, and 3) study the costs and returns of B. thailandensis culture by PSB. For the first experiment, the growth of PSB was measured using chicken egg concentrations of 5, 10, 15, 20, 25, 30, 35, 40, 45, and 50 ml/L, for a period of 14 days. The result showed that the chicken eggs at 5 different concentrations showed the best growth curve at 45, 50, 25, 10, and 5 ml/L, respectively. Therefore, these results were used for the second experiment, comparing the growth of                            B. thailandensis with PSB and Chlorella vulgaris (control). It was found that B. thailandensis cultured by Chlorella vulgaris has a significantly (P<0.05) higher growth rate than PSB. However, B. thailandensis cultured with PSB 25 ml/L had the highest survival rates and biomass statistically significant differences with other treatments (P<0.05). The costs and returns found that using PB to feed B. thailandensis resulted in higher net profits than using Chlorella vulgaris, using 10 ml/L of PSB had the highest profits and return on investment. Therefore, it concluded that the utilization of PSB replacement with Chlorella vulgaris for B. thailandensis culture was possible.