EFFECTIVENESS OF THE ADDITION OF Spirulina platensis IN ARTIFICIAL FEEDING FERMENTED AGAINST TIGER SHRIMP SEED PRODUCTIVITY

Black tiger shrimp farming in these days seem increasingly keen implemented both intensive and extensive, but the operational costs for the activities of tiger shrimp mostly from artificial feed. So that the Government promote the use of independent feed in aquaculture activities to reduce production costs. The protein content in the feed tiger shrimp is high thus requiring materials with high protein content as well. However, with the use of fermented feed and the addition of Spirulina platensis is expected to increase the protein content in the feed is made, so as to increase the productivity of farmed black tiger shrimp. The engineering done on feed manufacturing fermented and unfermented where at each given extra feed flour S. platensis as much as 0 g/kg of feed, 7 g/kg of feed, 10 g/kg feed and 13 g/kg of feed. The container used is a rectangular-shaped container with an obtuse angle at each corner with a volume of 1 ton filled with water as much as 0.5 tons. Shirmp fry used were juveniles reared in stadia PL 12 until PL 20, with a stocking density of tiger prawn is a 5 juvenils/L. Feeding is done four times daily at a dose of 3% of the total weight. Replacement of water and dirt removal is done every 3 days for 60 days of maintenance performed. Fermented feed has a higher protein content than unfermented. From the observation can be known if the weight of the highest growth rate in the treatment of fermented feed obtained by the addition of spirulina 13 g/kg of feed was 0.34 g and the lowest is fermented feed without the addition of spirulina was 0.22 g and the specific growth rate that is the highest in the feed fermentation with the addition of spirulina 13 g/kg of feed is 2.27% / day and the lowest on the feed without fermented with the addition of spirulina 10 g/kg of feed was 1.62 %/day. While the long-highest growth rate is without fermentation with the addition of spirulina 7 g/kg of feed was 2.84 cm and the lowest feed without fermented with the addition of spirulina 10 g/kg of feed was 2.07 cm and the specific growth rate that is the highest in the fermented feed the addition of spirulina 10 g/kg of feed is 1.94% / day and the lowest is feed without fermented with the addition of spirulina 10 g/kg of feed adalah1,56% / day. While the survival rate is highest in the feed without fermented with the addition of spirulina 10 and 13 g/kg  feed was 26.04% and the lowest was fermented feed without the addition of spirulina is 16.08%. This shows if the use of fermented feed with spirulina addition of 13 g/kg of feed are better than others.