Abstract
Abstract Dietary administration of 17 α-methyltestosterone (MT) was used to reverse the sex of striped bass Morone saxatilis to create phenotypic males that were genetically female. Fish were exposed to steroid regimes at various times to determine the labile period for effective sex reversal. Methyltestosterone was administered either by dry feed (2.5, 5, 10, 20, and 40 mg/kg) from 19 to 60 d posthatch (dph) or by feeding nauplii of Artemia franciscana cultured in MT media (2.5, 5, and 10 mg/L) from 6 to 30 dph. Sampling at 1 year revealed that a treatment of 2.5 mg MT/kg of formula diet altered the sex ratios significantly from an expected ratio of 1:1 and produced 82% males (N = 28, P < 0.05). Controls and other treatment levels did not differ from a 1:1 sex ratio. Some ovaries had delayed gamete development that was characterized by the presence of significantly more stage-I ova than stage-III ova compared with those from control females of a similar size. A few fish were intersex or sterile. The brin...
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
