Comparison of the oral administration of Gracilaria corticata and Saccharomyces cervesia on immunity indicators of Litopenaeus vannamei

In this study, Vanami shrimp were fed Gracilaria corticata alga and Saccharomyces cervesia yeast, then their immunity indicators were studied.  A total of 1800 shrimp with 5 gr after adaptation storage were were selected and after adaptation were introduced into nine 10-tons tanks. The first they were tested for disease. Shrimp did not have any bacterial viral diseases. A group was fed Gracelaria corticata as 1500 mg / kg and another tretment with Saccharomyces cerevisiae as 1 g / kg for 25 days. The hemolymph of shrimps was sampled on days 1, 3, 9, 18, and 25. Then, immunity indicators, including THC, TPP, SOD, POD and PO were compared. The results showed that in both treatments, the immunity indicators were significant increased compared to the control group (p <0.05). In addition, the immunity indicators in the algae treatment showed a higher increase compared to the yeast one (p <0.05).