Description

Abstract: 17a-Methyltestosterone (MT) is of potential use in commercial production of all male cohorts of food fish. Sexually undifferentiated Oreochromis niloticus received control ration or 30 mg MT/kg ration for 30 days. On day 31 control and MT pretreated fish received a single dietary dose of 3H-MT and were killed 1, 3, 7, and 10 days later. At 1 day after dosing only 2.5-3% of whole body 3H-MT residues were identified as parent compound. The concentration of residues remaining 1