The experiment was conducted at a Royal
Thai Department of Fisheries station located at
14'1 1'N and 100°30'W in the tropical lowland of
central Thailand during May-September 199 1. The
experimental treatments (A and B) were based on
2:l and 4: 1 of catfish and tilapia stocking ratios,
giving 880 or 1760 catfish with 440 tilapia in each
pond. Each stocking combination was replicated