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A field study was conducted to alleviate the cannibalism phenomena among the African catfish, Clarias gariepinus fry via periodical grading to eliminate the number of jumpers fry. There were significant differences among treatments in favor of T 1 (control without grading) at the 4 th week. However, the middle frequency of grading (T 2: grading each 3 days) realized the best survival rate (SR) of 49.17 % after 4 weeks and the highest fry body weight at the 2 nd week. So, with middle labor (grading the newly hatched fry every 3 days) and economic efforts without great stress on the fry, man can elevate the SR by 41 and 27 times than without grading (T 1) or grading each 7days (T 3), respectively. So, the economic efficacy (from selling the fry) could be improved by the same rate.

IMPROVING THE SURVIVAL RATE OF AFRICAN CATFISH, Clarias gariepinus