Date Received: 10-10-2018 / Date Accepted: 15-03-2019
This study was carried out to assess probiotics addition on Vibrioin culture medium and the growth performanceof poslarval white-leg shrimp (Litopenaeus vannamei) usingbiofloc technology. The postlarvae (0.007g/ind.in weightand0.90 cmin length) were nursed at 2postlarvae/lin 100 L tank containing 50 lof 30 ‰ seawater. Probiotics were daily added at 0.01 g/l(recommended concentration) and ½, 2 times, 3 times and 4 times reccomnended concentration compared to the control (without probiotics added). Results showed that after 20-day of culturethe ratio of Vibrio/total bacteria was lower in the probiotics addition treatment than the control. The individual length and weight of shrimps increased in all treatments when probitic added, especially the shrimps with three-times higher recommended concentration of probiotics significantly (P< 0.05) increasedin length and weight than that in the control treatment. The results of this study indicated that the ratio of Vibrio/total bacteria was reduced and shrimp growth performace improved when probiotics was combined withbiofloctechnology.
