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ixture of boiled full fat soybean seeds and dried algae (Dunaliella spp.) at mixing level of 1:1 was tested to replace fish meal protein at 50% (soybean); 50% mixture ; 75% mixture ; 100% mixture and 100% soybean, on Nile tilapia fry of initial weight 1.2 ± 0.05 g. Results obtained are summarized as follows : 1- Incorporation of the mixture of soybean seeds with dried algae in diets of Nile tilapia fry at 50 and 75% levels released no significant effects on final weight average weight gain, daily gain and survival rates, compared to the control groups, while the same parameters were decreased significantly in the other treatment groups. 2- Replacing fish meal protein with the mixture of soybean seeds plus dried algae (1:1) at 50% level had insignificant effects on feed conversion and protein efficiency ratios compared to the control groups, while the same parameters were negatively affected in the other group.

egyptian journal of aquatic biology and fisheries

Effect of replacement of fish meal protein with boiled full fat soybean seeds and dried algae on growth performance, nutrient utilization and some blood parameters of Nile tilapia (Oreochromis niloticus)