After 35 days posthatching, the highest values of average
weight (3.50 g) and the highest survival rate (94%) of tilapia
were recorded in fry treated with 60 mg 17a-MT /kg diet compared
to those of fry treated with 40 mg 17a-MT/kg diet,
80 mg 17a-MT/kg diet or in the untreated control group. On
the other hand, the lowest values of average weight (2.81 g) and lowest values of survival rate (60%) were recorded in tilapia
treated with 80 mg 17a-MT/kg diet as recorded in Table 2