Credit: Ismael Radwan (Egypt)
The photo shows a typical fish pond in Benin whereas such dug ponds of 200-300 m2 are filled by seepage while pumping is used to drain the pond. Usually the farm size ranges from 2-3 acres. The overall productivity usually does not exceed 2 tons/hectar of tilapia whether in monoculture system or in polyculture with African catfish.
