Effect of probiotics (B. licheniformis, Bacillus subti) on density and growth parameter, caracase component in different density of Litopenaeus vannamei

The aim of this study was to investigate the effect of the bacteria (Bacillus subtilis and licheniformis) on the growth factors and caracase contenent Litopenaeus vannamei in different density different. In this study, the shrimp were feed by tow concentration, probiotics 4×1010 cfu/g food and 1×1010 cfu/gfood and density 300 individval/m2 and 250 individval/m2during 8 weeks. Finally, growth, carcass composition and total count in the digestive tract were studied. Growth factor in the treatment of T2 (300 individual/m2, 4×1010cfu/gfood) and T4 (250 individval/m2, 4×1010 cfu/g food) showed significant different to control groups C1 (300 individval/m2), C2 (250 individval/m2)(p<0/05). Treatment such as; T1 (300 individval/m2, 1×1010 cfu/gfood) and T3 (250 individval/m2, 1×1010 cfu/g food) didn’t show significant different to T2, T4 andcontrol groups (P>0/05). Shrimp feed 4×1010 cfu/g food had significant higher Bacillus counts than shrimp treated by 1×1010 cfu/g food. The results of this experiment, the shrimp feed by 4×1010 cfu/g food showed improvement, in body composition and total count. But, there was not found significant different in growth factors, and caracase composition in different density (p>0/05). Therefore, it is suggested to use increase rate of probiotics L. vannamei shrimp colony forming units per gram of 1010 × 4 concentration used 4×1010 cfu/g food in increasingof shrimp production.