Conclusion
The use of SSM as a replacement for fishmeal at 0–100% levels showed that the proximate composition of the feeds did not differ statistically, except for ash content. Nutritional evaluation of these feeds did show significant statistical difference among themselves, in terms of weight gain. The mortality rate during the feeding trial did not present any conclusive trend. Chemical analysis of tilapia fed on the diets for a period of sixty days also differs statistically in terms of protein and lipid content. The results of this study show that SSM could be used as a substitute for SBM up to 60% in a practical diet for tilapia fry. Further research is required to evaluate the influence of higher SSM inclusion on the digestive enzyme profile and evaluate the influence on the digestive enzyme profile and the effects of these diets on the innate immune system of hybrid tilapia.