The influence of duration (10-20 d) and concentration (250-1,000 mg•kg-1 diet) of diethylstilboestrol (DES) treatment on the production of phenotypically female populations of genotypically YY Oreochromis niloticus was evaluated. Sex ratio of all DES- treated populations deviated significantly (P
Mair, G.C.; Marino, R.P.; Vera Cruz, E.M. Feminization of genotypically YY Nile tilapia Oreochromis niloticus L. Asian Fisheries Science (1996) 9 (3) 161-167.