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 bacteria isolated from shrimp pond sediment Bacillus mycoides, B. subtilis, and Pseudomonas diminuta towards plankton abundance, N/P ratio, and total bacteria in the culture media of white shrimp (Litopenaeus vannamei). This experimental research using a Completely Randomized Design (CRD) consisting of four treatments based on the difference in the bacterial density, namely K(0 cell/mL), B1 (10⁶ cells/mL), B2 (10⁷ cells/mL), and B3 (10⁸ cells/mL), with four replications each treatment and the shrimps were carried out for 28 days. The parameters were observed are plankton abundance, N/P ratio, and total bacteria. This research showed that probiotics could increase plankton abundance, N/P ratio, and total bacteria. The results of this research indicate that the different density of bacteria from shrimp pond sediment significantly different (p<0,05) towards plankton abundance and total bacteria in the culture media of white shrimp, while the administration of bacteria from shrimp pond sediment could increase the N/P ratio. The B3 gave the best results on plankton abundance, N/P ratio, and total bacteria of 13,566.88 cells/mm³, 7.22, and 2.93 x 10⁹ cells/mL respectively.