Provision of bacteria from shrimp pond sediment towards N/P ratio, plankton abundance, and total bacteria in the culture media of white shrimp (Litopenaeus vannamei)

This study aims to determine the effect of the administration of bacteriaisolated from shrimp pond sediment Bacillus mycoides, B.subtilis , and Pseudomonas diminuta towardsplankton abundance, N/P ratio, and total bacteria in the culture media of whiteshrimp ( Litopenaeus vannamei ). This experimental research usinga Completely Randomized Design (CRD) consisting of four treatments based on thedifference in the bacterial density, namely K(0 cell/mL), B1 (10 6 cells/mL), B2 (10 7 cells/mL), and B3 (10 8 cells/mL), withfour replications each treatment and the shrimps were carried out for 28 days.The parameters were observed are plankton abundance, N/P ratio, and totalbacteria. This research showed that probiotics could increase planktonabundance, N/P ratio, and total bacteria. The results of this research indicatethat the different density of bacteria from shrimp pond sediment significantlydifferent (p<0,05) towards plankton abundance and total bacteria in theculture media of white shrimp, while the administration of bacteria from shrimppond sediment could increase the N/P ratio. The B3 gave the best results onplankton abundance, N/P ratio, and total bacteria of 13,566.88cells/mm 3 , 7.22, and 2.93 x 10 9 cells/mLrespectively.