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How to make female tilapia males
The method for the maleization of female tilapia is the administration of methyltestosterone (methylketone tablets) for the purpose of destroying the reproductive system function of female tilapia seedlings. When the fish eggs hatched and emerged 5 days later, they were treated with a single dose of methyl testosterone with 3 kilograms of flour, and a small amount of squid material and fish meal were mixed and fed. Methyl testosterone tablets should be first dissolved with more than 95% of alcohol, and then mixed with flour, squid material, fish meal, depending on the number of juvenile fish (Tilapia seedlings grow to about 5 mm, more than this specification for drug treatment Invalid) to the end of the day when the bait is eaten as the standard, with a ratio of 3 kg of flour to expand or reduce the preparation, using the above method of juvenile continuous feeding 40 days, the final inspection, the general male rate up 95% to 97.5%. (The pond water should not be over-fertilized during administration, otherwise it will be ineffective). This method is also suitable for feeding shrimp, so that shrimp are precocious, promote mating, feeding time can be 5 to 7 days. Author: Gaoding Agriculture, Animal Husbandry and Fishery Station, Yongding County, Fujian Province
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