Stimulation of Sex Change or Ovarian Development in Protogynous Grouper, Epinephelus Coioides: Effect of Dose of Exogenous Androgens

News source: Mariculture Research Center, Taiwan Fisheries Research Institute
For further information: tfritnb@pchome.com.tw, 2003-06-01

Androgen Mixture and Sex Reversal

Efficacy of various doses of an androgen mixture containing testosterone (T), 17?-methyltestosterone (MT), and testosterone propionate (TP) in equal ratios, for the induction of sex reversal in protogynous orange-spotted grouper, Epinephelus coioides, was examined.

High Androgen Mixtures Induced Sex Reversal

All androgen mixtures at doses higher than 1000 ?g/kg BW were capable of inducing sex transition and completion of spermatogenesis up to the functional male phase. It was concluded that the stimulation of sex change or ovarian development depends on the dose and time course of implanted androgens. Plasma T levels were correlated with the development of controlled male phase in protogynous grouper, E. coioides.

Download the PDF. of this document, 24,530 bytes (24.0 KB).