fish culture experiments with Abramis brama orientalis in earthen pond to diversify aquaculture fish composition in Iran

On two consecutive culturing period, the Caspian sea Bream fingerling average individual weight 30g stocked in a fish pond at the rate of 3000 unit per ha to rear through mono-culture method. Also in the other test carp pond fish comprised of 70% bream, 20% silver carp and 10% grass carp totally 4000 unit per ha Stocked to examine poly-culturing with bream species. The test replicated in second year by the same manner but the only difference was the weight of stocked bream fries which were 4g on average. Chemical fertilizer and chicken manure applied as warm water fish culturing technique demand. Carp grow out feed pellet supplemented to the ponds. Fish health, water quality and growth rate monitored. The minimum water temperature were 9 ֯C and maximum 33 ֯C recorded. Dissolved O2 = 5-7 mg/l, pH = 7-8.62 in the first year by mono-culturing method the bream achieved 200 gr by species on average. But with poly-culture system the bream gained 250g weight. Also individual species reached.....