Control of sex differentiation in fish

Details Control of sex differentiation in fish Control of sex differentiation in fish

A - Human Necessities

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A01K 67/00 (2006.01) A61K 31/40 (2006.01) A61K 31/41 (2006.01) A61K 31/415 (2006.01) A61K 31/44 (2006.01) A61K 31/445 (2006.01) A61K 31/495 (2006.01) A61K 31/505 (2006.01) A61K 31/55 (2006.01) A61K 31/565 (2006.01)

Patent

CA 2066369

JLT14 18351 TITLE OF THE INVENTION CONTROL OF SEX DIFFERENTIATION IN FISH ABSTRACT OF THE INVENTION Fish or shellfish eggs, fertilized embryos or hatched fry or shellfish are treated with steroid biosynthesis inhibitors or antagonists which prevents the conversion of androgens to estrogens. By blocking the production of estergens the genotypic female is converted into a phenotypic male. The phenotypic conversion of females to males gives the treated fish the advantage of male growth characteristics. Such treatment will also allow the production of monosex populations of fish which can be used to limit reproduction and control overpopulation of specific aquatic environments. Steroid biosynthesis inhibitors and/or antagonists will also induce smoltification in salmon species.

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