Extensive aquaculture in freshwater is widely practiced across Europe, particularly in Central and Eastern Europe.
This method of long-term growth consists in maintaining ponds (natural or artificial) in such a way as to favor the development of aquatic fauna.
Every winter, lakes and lagoons are cleaned and fertilized to stimulate aquatic vegetation and therefore to help develop microorganisms, molluscs and crustaceans, larvae and worms that form the basis of the aquatic food pyramid.
It encourages the development of “marketable” animals with a higher yield than that of the natural ecosystem.
Extensive farm production is generally low (less than 1 t/ha/year). Species produced vary according to regions: zander, luce and various species of carp, wels catfish, crayfish and frogs.
Freshwater aquaculture in a semi-intensive system, namely production in pools and ponds, extends beyond extensive aquaculture by adding additional feed, usually in the form of dry pellets, as a supplement to natural food available in the pond, which allows increased stocking density and higher production per hectare.