I am trying to evaluate the amount of MT which could be used as a minimal single dose/amount required per day to each fish to have an effect on sex reversal. What is a minimal amount of MT per fish to effect the sex reversal?
In the mixture of feed and hormones, how does this hormone attach to the feed after alcoholic evaporation? Is there any bonding?
Also, I would like to know the mechanisms of effects once the hormones enter the blood stream, where is it acting?
There is a better and cheaper sex reversal agent - dehydroepiandrosterone (DHEA). Please refer to this http://www.academia.edu/2548883/Optimum_dosage_for_growth_of_dietary_dehydroepiandrosterone_in_hybrid_red_tilapia_fry_Oreochromis_niloticus_Linn_x_Oreochromis_mossambicus_Linn
Hi Augusto! In Brazil the use of 17 alpha methyltestosterone is still under registration / authorization. What alternative methods are used for sex reversal of tilapia in the Philippines and other Asian countries? Thank you.
Hi Sergio. It is still 17 Alpha methyltestosterone since it is not under regulation as of yet.
Hello Augusto, Please why did you refer to DHEA as a "better" sex reversal agent than 17-alpha MT? Please can you shed more light
Hi Desmond. I said DHEA was better not because it is better in reversing sex than testorsterone but because it has an equivalent effect on sex reversion, growth and feed conversion without the higher expense and threat to the environment associated with the use of testosterone. Please see the paper at the link in my first answer. Thank you.
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