Effect of agar and alginate on growth performance and levels of leukocytes and erythrocytes of Tilapia Oreochromis niloticus

The use of immunostimulants is an effort to increase the immune system in fish. Agar and alginate are phycocoloid derived from seaweed which function as immunostimulants. Research data collection was carried out for 60 days at Aquaculture Toxicology Environmental Installation, Cibalagung - Bogor. container used aquarium with a size × 40 50 cm, using aeration stocking density 15 fish / aquarium. tilapia Oreochromis niloticus initial weight 4.36 ± 0.01 g. research method laboratory experimental completely randomized design (CRD) three replications. treatment agar or feed. Treatment A control feed without alginate; B containing C D alginate, 1% dose each treatment. Parameters measured were absolute growth, specific growth rate, survival rate blood profile (leukocytes erythrocytes). results showed that addition did not have significant effect on survival, but had different white cells (leukocytes) compared control. Between (B), (C) + (D), highest value gain (10.437 0.65 g), (3.06 0.08% day), (100 0.0%). Whereas profile, leukocyte levels, namely 9.89 104 mm3 erythrocyte 1.71 x106 mm3. conclusion this study and/or affect able number leukocytes.