Parameters/Governments Assiut Kafr el- Sheikh Alexandria Beheira
Serum MT (ng/ml) ND 2.03 ± 0.16*** 2.32 ± 0.31*** 3.47 ± 0.19***
Muscle MT (ng/g) ND 0.93 ± 0.07*** 1.54 ± 0.15*** 2.01 ± 0.19***
Table 1: Methyltestosterone (MT) levels in blood serum and muscle of Nile tilapia (Oreochromisniloticus) collected from Assiut farms as control, and three farms of Beheira, Alexandria, and Kafr el-Sheikh as monosex farms.