Inter- and Intraspecific Variation in Sex Hormone-Induced Sex-Reversal in Medaka, and .

We compared sex-reversal ratios induced by 17α-methyltestosterone (MT) and 17β-estradiol (E2) exposure in two inbred medaka strains: Hd-rR derived from and HNI-II from . All MT exposures (0.2-25 ng mL) induced complete XX sex-reversal in HNI-II.