Polyculture

• A system in which two or more species with different habitats and different food preferences are stocked together in such densities that there will be almost no food or space competition.
• Available water is put to optimum use.
• Gives higher yields than monoculture under the same conditions.
• Success depends on food supply, stocking densities, and synergism.
• Common species of Chinese polyculture include Grass carp, Silver carp, Bighead carp, Black carp, Common carp, Mud carp, Crucian carp, and Tilapia.
• Indian Polyculture includes Catla, Rohu, Mrigal, Silver Carp, Grass carp, and common carp.
• In Polyculture, feed competition is minimized through the adjustment of stocking ratio among the various fish species, and appropriate management of feeding and manuring.