Effect of replacing dietary fish meal by cottonseed meal on growth performance and feed utilization of the Nile tilapia, (Oreochromis niloticus)

The present study aimed to investigate the effect of partial or complete replacement of the fish meal (FM) by cotton seed meal (CSM) in diets of Nile tilapia, Orcochromis niloticus, to reduce feed costs. Therefore, fiveexperimental diets contained 0, 25, 50, 75 and 100% CSM as replacements of FM. The final body weight decreased with increasing the level of replacing FM by CSM. However, the replacement of 25% of FM by CSM had no significanteffect on the final BW, while the higher replacing levels (50, 75 or 100%) significantly (P