Replacing fishmeal with a single cell protein feedstuff in Nile tilapia Oreochromis niloticus diets

There is a growing concern about the use of fisheries-derived proteins in aquaculture. This study was conducted to investigate effect either partially or totally replacing fishmeal (up 15% diet) by inactivated dry yeast product DY-Pro Nile tilapia Oreochromis niloticus diets. The replaced 0% (DY-PRO0), 2% (DY-PRO2), 5% (DY-PRO5), 25% (DY-PRO25), 50% (DY-PRO50), 75% (DY-PRO75) 100% (DY-PRO100) protein provided seven isonitrogenous and isocaloric experimental diets, which were fed fish (initial average body weight 11.33 ± 1.65 g) for 12 weeks. At end experiment, graded replacement 2–100% did not significantly (P < 0.05) affect gain gut length weight, but linearly improved feed nutrient utilization. Moreover, have any negative impacts on gastrointestinal tract as shown histopathology. no pathogens signs significant metabolic toxicant-related disease epithelium. Results showed that given diets containing consumed less achieve same fishmeal-based Overall, good ingredient, could replace possibly lead reduced costs.