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1996•Asian Fisheries ScienceRequires access

Feminization of Genotypically YY Nile Tilapia Oreochromis niloticus L.

E.M. VERA CRUZ

Open publisher page 18 citations

Abstract

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<0.05) from the expected all male. Concentration of hormone was a significant factor in the production of phenotypic females, and the effective period for feminization treatment was 10·15 d following yolk-sac absorption. The critical factors influencing effective sex reversal treatment are discussed.

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What this paper is about

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<0.05) from the expected all male. Concentration of hormone was a significant factor in the production of phenotypic females, and the effective period for feminization treatment was 10·15 d following yolk-sac absorption. The critical factors influencing effective sex reversal treatment are discussed.

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OpenAlex reports 18 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

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<0.05) from the expected all male. Concentration of hormone was a significant factor in the production of phenotypic females, and the effective period for feminization treatment was 10·15 d following yolk-sac absorption. The critical factors influencing effective sex reversal treatment are discussed.

Key concepts: Oreochromis, Nile tilapia, Feminization (sociology), Biology, Sex reversal, Animal science, Endocrinology, Internal medicine

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