The Potency of Bacilus sp as Particle-associating Bacteria in Laboratory Condition
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Abstract
The aim of this study was to know the potency of Bacillus sp in colonizing artificial particles in laboratory condition. Study of particle –associating capacity of Bacillus sp by using artificial-sphare agar as particle and transprant exopolimeric particles (TEP) produced by Thalassiosira weisfloggii as well as flocculating activity. The results of this study showed that Bacillus sp were able to associate both artificial agar spheres and transparent exopolimeric substances (TEP) as well as high flocculating activity produced by phytoplankton, T. weissfloggii. The mean number of Bacillus sp in colonizing artificial agar spheres increasing with incubation time was 3,50 x 105 cells/agar spheres and Transprant expolimeric particles, 2.9 x 108cells/mL; and flocculating activity, 92 % after four days incubation. In conclusion that Bacillus sp has a high potential as particle-associating bacteria used in intensive shrimp farming system. Keywords: Particle–associating bacteria, Thalassiosira weisfloggii, Bacillus sp, Phytoplankton
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