IMPROVEMENT TIGER SHRIMP PRODUCTION WITH BIOFLOKS SYSTEM WATER MANAGEMENT IN THE POND
Aquaculture management with bioflock technology for tiger shrimp culture through addition of probiotic bacteria to improve decomposition proccess organic material form over feed and shrimp feces degrade so as to avoid of toxic compounds such as ammonia and nitrite.
Study was conducted on fourth ponds. Pond square was 4000 m2. Pond preparation was do for improve pond environment and avoid of pathogen. Stocking density of post larvae was 150.000 pices per metre (37,5 pieces per m2).
The maintain for growth and abundance of probiotic bacteria was be added a carbon source for the balance C/N ratio. Application of probiotics with the Bacillus sp. bacterium with dose is 1 kg /L/ha. Controlling abudance of probiatic backteria with apply molasses dose 2-5 % form total feed was used in the pond. Application molases was do two time per week.
Results growth shrimp 22,3-23,9 g/ind with Average Day Growth (ADG) 23,24 ±0,7962 Survival rate 51-57%. Averege daily grouth rate (ADG) was 0,18±0,0061g/days. Shrimp production is 1.801-1.901 kg/ pond (4,503-4,988 kg/ha). Water quality of amonia maksimum was 0,48 ppm and Nitrite maksimum was 0,9 ppm. Total organic metric (TOM). Avarege of total bacteria wa 5,1 x 105 CFU with total vibrio sp bacteria less 11,4%. The salinity of water during culture period was 32-55 ppt. Abudance of bioflock was 20 cc/L that was measuer with inhoff tube. Bioflocs management system showed stable water quality parameters during aquaculture. Ammonia and nitrite can be reduced in conditions below the threshold.