Androgen synthesis in the silverside Odontesthes bonariensis

Blasco M., Somoza G.M., Vizziano D.

Date de parution: juillet 2008
Volume: 32
Number: 2 suppl.
Pagination: 086
Editeur: Société Française d'Ichtyologie

Though it is generally accepted that steroids are able to affect the sex ratio in many teleost species, the role of androgens in the sex determination/differentiation process in fish species with temperature-dependent sex determination systems (TSD) has not been established. We investigated the androgen synthesis capacity of the gonads, kidneys and liver of immature and adult pejerrey Odontesthes bonariensis, a species with strong TSD, and observed that 11-oxygenated androgens are mainly produced by the testis, and in some extent by the kidneys. We were not able to detect 11-oxygenated androgens in the ovaries and liver. This information lead us to study the androgen potentiality in the gonads and trunks of pejerrey during the TSD period.

Mots-clés: 11-oxygenated androgens - Silverside - Steroidogenesis
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