出生前の雄性ホルモン処理によるグッピ-雌の機能的雄化〔英文〕
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概要
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In order to obtain female unisexual broods of the guppy, Poecilia reticulata, the possibility of sex reversal of genetic female offspring was examined by daily oral administration of methyltestosterone (MT, 300-500μg/g diet) to gravid females during various periods of gestation. Treatments with 400μ MT initiated 8 to 10 days prior to parturition and lasting up to the end of gestation most successfully caused the birth of all male young, and resultant sex-reversed males were evidenced to be fertile to yield all female broods when mated naturally with normal females. Treatments for longer periods of gestation or with higher dosage of MT were liable to bring about a delayed and obstructed parturition accompanying the birth of dead embryos and an infertility of sex-reversed males. This manner of hormone application was considered to be more facile and stable as compared with the method reported previously in obtaining sex-reversed, functional males of the guppy.
- 日本水産學會の論文