Author(s): Arnauld SM Djissou, Juste V Vodounnou, Comlan E Tossavi, Aboubacar Toguyeni and Emile D Fiogbe

Abstract: For a period of 42 days, a total replacement of the fish meal by a mixture of unconventional sources of proteins (Azolla filiculoides, Dialium guineense leaf, brewers' yeast and maggot) was carried out for the of Oreochromis niloticus fingerlings. Five experimental diets isoproteic (34.6 ± 0.5%) reference diet and four test diets (A1 to A4) were used to feed O. niloticus fingerlings of average weight. At the end, the final mean weight (FW) and the daily weight gain (DWG) in the test diets (13.66 to 14.84g) were lower than those obtained by reference diet (18.45g) with P<0.05 The same observation was made with the SGR (1.17-1.33 vs 1.83% day-¹) and PI (4.24-4.85 vs 5.80) in diets. The survival rate was not affected by the experimental diets, in the same way for the FCR and the PER, except the diet A1 (P<0.05). Productive Protein Values (PPV) were between fin the reference diet A0 and 2 (0.39 vs 0.35 respectively) re are no significant difference with P>0.05 Threonine appears with methionine like factors limiting in test diets. Locally available unconventional proteins sources can totally replace fish meal without compromising growth performance, feed utilization and carcass traits but a close attention must be paid to methionine and threonine in order to satisfy nutrients requirements of O. niloticus fingerlings.

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