Impact of fish meal replacement by uncounentional ingradients on performance of Nile telepia

The effect of partial or total replacing fish meal with dried rumen content [RC] and or Azolla meal [AM] in diets of Nile tilapia of initial weight [7.35g +/- 0.23] was investigated in 12-week experiment. Eight experimental diets were formulated to be isonitrogenous and isocaloric. Beside the basal diet, each of RC and AM were incorporated at levels of 5, 10 and 15%. A combination of 5% RC and 5% AM [RC-AM] was served to replace 10% fish meal. The control group achieved the significant highest final body weight gain, protein efficiency and food conversion ratio followed by the group fed 10% RC. Azolla incorporation failed to improve any of the performance parameters. The group fed 15% AM was the worth regarding performance parameters, CP and EE retention of final body composition and dietary CP digestibility. The group fed a combination of 5% RC and 5% AM sustained intermediate pattern among treated groups with improved in FCR [4.05]. The results indicate some benefits from replacing dietary 10% fish meal with either 10% RC or a combination of RC-AM on Nile tilapia performance as well as reducing feed cost