بررسی آثار ارگوسان و ویبرو ماکس بر رشد و بقای پست لاروهای میگوی سفید هندی(Fenneropenaeus indicus)

Immunostimulants are one of the important ways to prevent diseases. The vaccination and immune system stimulator and their combination can increase the ability of vaccines in prevention of diseases and improved indexes of growth and survival rates in shrimps. In this research, the separate and simultaneous effects of Ergosan and Vibromax vaccine on the growth factors such as total length and increasing of dry weight and survival rates in three stages of post larvae PL1,PL5 and PL15 in Indian white shrimp (Fenneropenaeus indicus ) were studied. The feeding of vaccine to shrimps was done through Artemia nauplii ( Artemia franciscana) enrichment. The effects of Ergosan (T1) and effect of Vibromax (T2) separately and in combination (T3) along with a control treatment for comparison were studied. Taking into consideration of 4 treatments and 3 replications for each of them, 12 similar vessels were used, which were refilled with 10 liters of water and reserved with 100 larvae in liters in zoa stages and were fed in a completely randomized design. Duration of experiment was from zoa stage to PL15 and in the end of 12, 16 and 25 days they were analyzed for the biometry and determination of survival rates. Results showed that the highest amount of total length (mm) was observed in PL1,PL5 and PL15 stages in T3 (5.26, 6.45 and 18.41) and was a little different from that in T1 (5.28, 6.32 and 17.94) which was significantly different from the control treatment ( 4.91 , 6.09 and 17.36 ) at P0.05). The highest amount of dry weight (mg) was observed in PL1, PL5 and PL15 stages in T3 (0.296, 0.890 and 2.940). In contrast to the control (0.216, 0.640 and 2.875) it was significantly different (P<0.05).The highest amount of survival rates (%) was observed in T3 (77.33, 76.33 and 80.67) which unlike control treatment (57, 57.33 and 59.67) was significantly different (P<0.05). The use of these two products in a desired feeding program from zoa stage to PL12 could increase the resistance and immunity in post larvae and survival rates and growth factors in shrimps leading to produce suitable post larvae for introducing into the training ponds.