The survey of different density culture of Asian seabass(Lates calcarifer) in shrimp ponds in ‎ Choebdeh Abadan province

Recently shrimp industry has faced great challenge. Viral disease of the white spot causes the ‎inactive ‎of many farms. . Sea bass ‎fish with fast growth, easy replication, tolerance to high salinity and ‎the ability to accept formulated ‎foods can be used as alternatives to shrimp farms. Therefore, applied ‎research was designed. All ‎stages of the research were conducted at Chouebdeh Abadan Shrimp ‎Center. ‎‏9‏‎ pools of ‎‏7000‏‎ square ‎meters were selected in ‎‏3‏‎ treatments. The treatment was stored ‎with ‎‏12000‏‎, ‎‏13500‏‎ and ‎‏15000‏‎ fish per hectare. The ‎fish were ‎‏40‏‎ grams. The biomass was every ‎‏3‏‎ ‎weeks. Nutrition and growth indicatores including ‎specific growth factor (SGR), Food conversion rate ‎‎(FCR), Weight growth (WG), protein efficiency rate ‎‎(PER) and survival rate (SVR) were studied. Pellet ‎feeds were used at ‎‏2‏‎-‎‏5%‏‎ body weight . Physico-‎chemical factors including pH and pH were measured ‎during the course of the experiment. The results ‎showed that final weight had a significant difference ‎after ‎‏175‏‎ days. Treatment with high-density ‎growth in less than two treatments. (P <‎‏0.05‏‎). The final ‎weight was ‎‏14.9‏‎ ± ‎‏17.749‏‎, ‎‏5.9‏‎ ± ‎‏5.763‏‎ and ‎‏3.8‏‎ ‎‎± ‎‏5.662 gr. Food conversion rate did not show a ‎significant difference in treatments. And ‎‏1.39‏‎ ± ‎‏0.33‏‎, ‎‏1.42‏‎ ± ‎‏0.05‏‎, and ‎‏1.45‏‎ ± ‎‏0.60‏‎, respectively. ‎Survival percentage did not show significant difference. ‎And ‎‏82.54‏‎ ± ‎‏0.86‏‎ ± ‎‏84.81‏‎ and ‎‏86.21‏‎ ± ‎‏0.87‏‎ ‎respectively. The results showed that the density of ‎‏13500‏‎ fish /hectare was the best treatment. Can ‎be used as a method.‎