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Tag: graders

Grading of sex-reversed tilapia fry in the Philippines

Credit: Ahmed Hegazy (Egypt)   The photos were taken in a commercial tilapia hatchery in the Philippines. The practice shows the grading of tilapia fry after the completion of the sex reversal process which is done in hapas in which 17ᾳ methayl testosterone is used for 21 days. The grading is an important practice in …

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