ABSTRACT
Modern pond fisheries are of two types: warm-water and cold-water. This division is based on the biological peculiarities of the fish cultured in the ponds, the foremost being their behavior toward external environmental factors, mainly temperature and hydrochemical conditions. In full-system fish farms fish are raised from eggs to the marketable stage. In the partial-system only one of the two stages of production is undertaken: only stock material or seed fish reared, or foraging farms in which the seed fish are fattened to marketable weight and size. Pond fisheries are organized on different rotation schemes. Rotation in pond fisheries means the length of time required for raising fish from eggs up to the marketable stage. This period varies according to the type of pond fishery and the culture of individual species of pond fish in different climatic conditions. Finally, pond fisheries are categorized on the basis of their operational organization as extensive, semi-intensive, and intensive.
