Effects of Partial Substitution of Macro Algae Gracilaria pygmaea with Fish Meal on Some Bloodof Asian Sea Bass (Lates calcarifer

Inroduction & In aquaculture, algae to increase immunityand survival of fish used commercially. The purpose of this study was to evaluate the effects of replacing fish meal with Grasilaria macroalgae in the diet and its effect on bloodfactorsin Asian Sea bass (Latescalcarifer
Material and For this purpose, 150 pieces of fish with an average weight of 28 grams perfectly with 3 replications and 3 treatments in the 15, 300-liter fiberglass tanks (10 fish per tank) were distributed. Fish for 40 days with a diet containing 3, 6 and 9 percent macroalgae powder Grasilaria per kg of food and two groups of positive and negative controls (both no algae) were fed. At the end of the experiment the fish Caudal vein collected blood samples and blood parameters were measured.
The results of the present study showed that the replacement of macroalgae in the diet of Asian Sea bass on fish blood factors including hemoglobin, hematocrit and differential percentage of white blood cells have no significant effect. But, at the treatment of 3% replacement of macroalgae were observed significant different in levels of white blood cells count, lysozyme and total protein amount (P
The results of this study showed that replacement of macroalgae (Gracilaria pygmaeaat level of 3 percent have resulted in significantly increase in the white blood cells and lysozyme than the control group and the amount of total protein at the 3 and 6 percent had a significant increase compared to the control group.