INFLUENCE OF AFRICAN CATFISH (Clarias Gariepinus) AS a PREDATOR CONTROL INTERACTION AND BAMBOO POLES SUBSTRATE ON GROWTH PERFORMANCE AND PRODUCTION OF THE MONO-SEX, MIXED-SEX NILE TILAPIA (Oreochromis Niloticus) AND COMMON CARP (Cyprinus Carpio) IN SEMI-INTENSIVE POLYCULTURE POND SYSTEM
