Trends in cyprinid polyculture

Roland Billard & Paolo Berni
Polyculture is the association of fish species, mostly cyprinids, feeding at different levels of the aquatic pond ecosystem. It is an efficient food production system, which typically produces five tonnes of fish/ha/year without distribution of formulated artificial feeds but with intense organic fertilisation as well as grass and agricultural by-products. The exact figures of polyculture production in the world are not known precisely. A part of the production of cyprinids is due to monoculture of...
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