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The ecotype cichlid, 'wesafu', as it is commonly called, grows to a massive size of 1.5kg and 414mm total length in the wild, which makes it a fish of great aquacultural importance in Lagos, Nigeria. The study was conducted to evaluate its growth performance and nutrient utilization when reared in hapa. 50 Fingerlings with average weight of 7.73g were allocated into 1m 3 m hapa installed in a 0.025ha pond and replicated. Four experimental diets (T1, T2 , T3 and T4) were formulated with crude protein levels of 15%, 25%, 35% and 45% respectively, using a locally fabricated pelletizing machine, with particle sizes of 1.5- 2.0 mm. Fish were fed 3% of their body weight twice daily while samplings were carried out forthnightly. The results showed that fish fed T4 (Crude protein of 45%) recorded the highest growth performance and nutrient utilization. This was followed by T3, T2 while T1 had the least of these indices. No significant difference (P< 0.05) was observed in fish survival and the range was 78.7- 87.8. It showed that final weight gain was significantly higher while FCR was significantly lower in T4 and T3 when compared to T1 and T2. The Food Conversion Ratio was least in T4 and T3 indicating better nutrient utilization. Similarly, protein efficiency was enhanced when the crude protein was increased. There was however no significant (P< 0.05) variation in the growth performance and nutrient utilization between T3 (35%) and T4 (45%) crude protein levels. It can therefore be inferred that the optimum protein requirement for the studied fish ('wesafu') is 35% crude protein. The extra cost incurred on the addition protein (T3 to T4) did not produce any appreciable increase in growth. Feeding above this level will lead to increased cost with little or no proportionate benefit.

Growth Performance and Nutrient Utilization of the Cichlid, Commonly Called ‘Wesafu’ Reared In Hapa