الفهرس 
Utilization of Low Protein Diets by Freshwater under Zero Water Exchange Systems
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Abstract
The C treatment recorded the highest values (p<0.05) in terms of floc volume, total suspended solids and
total ammonia nitrogen. Control treatment showed the highest final body weight (FBW) and Specific
growth rat (SGR) followed by LPHL treatment. No significant difference noticed for feed intake among
treatments. The FCR values were significantly different (p<0.05) among the treatments and the best FCR
was recorded for C treatment, while the poorest value was recorded for LPLL treatment. The best
significant input /output ratio was recorded for LPHL treatment while the poorest values were recorded for
C and LPLL treatments without significance differences between both