Sex Reversal in Tilapia

Tilapia belongs to a family of fish that is commercially cultured throughout the world. They tend to overpopulate when reared in ponds because they mature and reproduce early and frequently. This results to smaller-sized fish at harvest commanding lesser prices in the market.

Male tilapias are preferred over the females for aquaculture activities because of their bigger size. In order for the males to be selected over the females, manual sexing can be done, but very laborious, time-consuming, and only 80% accurate.

Dr Rafael D Guerrero III studied this problem. He developed a feed mixed with the sex hormone methyltestosterone. The formulation converted the female tilapia fries to males, thus, bigger tilapias and overcrowding was prevented. For this, he received the prestigious Mgr Jan DF Heine Memorial Award in 2004 given by the International Je Dois Faire Assembly.


2 responses to this post.

  1. Posted by alabi kehinde alabi on 5 January 2012 at 20:28

    pls i want to know more about the principles and procedure of producing sex reversal genetically male tilapia.i am a breeder in aquaculture based in nigeria.


  2. Posted by alabi kehinde alabi on 5 January 2012 at 20:30

    pls can you put me through on the procedure to produce genetically male tilapia usig the sex reversal method.i am a breeder based in nigeria


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