Effects of Bacillus pumilus BP-171 and Carbon Sources on the Growth Performance of Shrimp, Water Quality and Bacterial Community in Penaeus vannamei Culture System

A strain of Bacillus pumilus BP-171 with the ability heterotrophic nitrification-aerobic denitrification was isolated from a shrimp culture pond and showed good under laboratory conditions. In order to investigate effects its combinations different carbon sources, i.e., poly-3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) molasses, on growth performance shrimp, water quality bacterial community in system Penaeus vannamei, this experiment set up. Four experimental groups were designed, group B applied single B. BP-171, BP added PHBV, BM control DZ without probiotic source. The results that specific rate, final body weight, gross feed efficiency rate survival better than those (p < 0.05), while weight also 0.05). Among them, best observed BP. concentrations ammonia, nitrite, nitrate total nitrogen significantly lower all treatment lowest ammonia nitrite found B, dissolved organic both higher Compared control, abundance diversity did not change addition probiotics sources. However, altered structure predicted function, as well improved stability ecological network community, water. view above, PHBV promoted effectively quality, enhanced communities water, which could have great potential for application intensive P. vannamei.