Inclusion of a commercial poultry by-products meal or fish wastes meal as a protein replacement of fish meal in practical diets for Nile tilapia (Oreochromis niloticus) [electronic resource].

Includes references.

Poultry by-product meal (PBM) and fish wastes meal (FWM) were substituted each alone for fish meal protein in eight experimental diets for Nile tilapia fingerlings (Qreochromis niloticus) at 25%, 50%, 75% and 100"10 substitution levels which were compared with the control diet (10% fish meal).Ten fish were stocked in triplicate groups with a mean initial body weight of 6.4 g which were fed nine isonitrogenous( 30.29% CP) and isocaloric (438.81K.ca GE/ 100 g diet) diets at 3% of wet body weight for a period of98days. Results showed that final weight gains (g), weight gain (g or %) of fish fed poultry-by product and fish waste meal at the tested substitution levels were lower (P < 0.05) than those fed on the commercial control diet (10% fish meal) except T, which recorded values sin3ilar to the control group with insignificant differences. Fish fed on diet with 75% PBM showed generally the highest protein retention value (2.55g/fish) compared with the control diet (2.35 g/fish). Both ADP and protein retention value were observed insignificant differences of the control group as compared to the diets containing FWM up to the 75% substitution level of FM protein. The results of this study indicated that PBM and FWM were acceptable ingredients for the partial replacement of fish meal protein in practical diets for tilapia up to75% substitution level of fish meal protein, without adverse effects on growth performance.

Summary in Arabic.

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