Effects of Immunogen Supplementation on Growth Index, Survival and Body Composition of the Pacific white Shrimp (Litopenaeus Vannamei)

Effects of immunogen supplementation on growth index, survival and body composition of the Pacific white shrimp (Litopenaeus vannamei) (3.0±0.19g) were investigated for 8 weeks at a stocking density of 15 shrimp per tank. Commercial shrimp diet was supplemented with 0 (control), 0.05%, 0.1% and 0.2% Immanogen in a totally randomized design trial in triplicate groups. There were no significant differences in growth parameters between fish fed control and immunogen supplemented diets (P>0.05).The average increase in body weight, percentage of body weight gain, specific growth rate and net production generally enhanced in shrimp fed on diet containing 0.1% immunogen. Feed intake (%/day and g/shrimp) increased in shrimp fed on diet containing 0.1% immunogen (P<0/05). No significant difference in body composition was observed (P>0.05). The experiment indicated that the immunogen did not the increase of the growth performance of pafific mhite shrimp and it is not appropriate for supplementation in the diet Pacific white shrimp.