The 4 -month experiment was carried out at an interior farm located 6 km from the sea. Water was sourced from a groundwater connected to eight fiberglass tanks (four tanks/treatment) at 14 ppt. A daily water exchange of 5–10% of the tank volume was drained and refilled. Fish (25 fish/tank) were fed tilapia and marine pellets three times daily at 6% of their biomass. The mean final body weight for marine pellet treatment was significantly (P <0.05) higher (126.51g) than tilapia pellet treatments (89.20 g). Specific growth rate (SGR) of 0.81 and 1.0 %/day, were obtained in sinking tilapia and marine pellets, respectively. Feed conversion ratios (FCR) for treatments with the extruded marine pellets was 1.7 g feed/g gain, which was significantly (P <0.05) better than treatments with tilapia pellets (2.50 g feed/g gain). Survival rates were 100% survive for all the groups fed with extruded sinking tilapia and marine pellets, respectively (Table 1).
Among the various biochemical parameters in the present study, there were significantly different (P<0.05) in treatments with tilapia and marine pellets for seabream cultured in brackish water except for ash , fiber (Table2).