Gonad Sex Differentiation of Anguilla anguilla by Sex Steroids

• Published in: Internationale Revue der gesamten Hydrobiologie und Hydrographie
• Main Authors: Colombo, Giuseppe, Grandi, Gilberto
• Format: Article in Journal/Newspaper
• Language: English
• Published: Wiley 1990
• Subjects: Anguilla anguilla
• Online Access: http://dx.doi.org/10.1002/iroh.19900750610; https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Firoh.19900750610; https://onlinelibrary.wiley.com/doi/pdf/10.1002/iroh.19900750610

Abstract Anguilla anguilla elvers, reared in warm fresh water, were treated with 17 a‐methyltestosterone (MT) and with 17 α‐ethynilestradiol (EE), administered with a commercial diet. A very low proportion of untreated elvers developed as females. A very high proportion of the EE treated elvers developed as females and the gonads differentiated as ovaries at an earlier growth stage. Among the MT treated elvers, in a very low proportion of eels the gonads developed as ovaries, most into a undifferentiated testis‐like gonad and some with abnormal histological features.