Test the effectiveness of Porphyridium aerugineum as Vibrio controller in shrimp ponds

Bacterial disease control in shrimp ponds was currently taking a more environmentally friendly approach. Thwas study aims to find out the effectiveness of Porphyridium aerugineum as a controller of Vibrioswas in ponds. This research was carried out at with two treatments with three replications. The first treatment was the administration of whole-cell microalgae P. aerugineum and the second treatment was control without microalgae administration. Tiger shrimp was stocked at the stadia PL 12 (density of 8 shrimp fry/m2). The study used 6 ponds measuring 10m x 25m with a water depth of 80cm. Microalgae was given once a week. A sampling of pond water and sediment was carried out once in two weeks. The results showed that the addition of wholecell microalgae P.aerugineum in ponds can reduce the ratio of total Vibrio bacteria and total plate count in ponds water but not in pond sediments. In ponds fed microalgae P.aerugineum, shrimp survival rate and production were higher than those of in controls. The results of thwas study showed that the adminwastration of microalgae as an additional supplement in ponds gave better results compared to the control.