[Regularity of formation of ponds fish productivity at carp fishes pasturable cultivation in polyculture]
2005
Pantelej, S.M.(The National Academy of Sciences, Minsk (Belarus). Institute of Fisheries)
Complex use of organic and mineral fertilizers and brewing industry wastes at pasturable carp fishes polyculture cultivation well counted on hydrochemical and hydrobiological ponds regimes and allows to increase in their fish produce to 5-6 c/ha. Content of dissoluted oxygen in water, Ph of medium, the common hardness and medium mineralization, nitrates and phosphorus concentration, pure primary products, biomass of phytoplankton and zooplankton are the factors wich define the fish productivity of fishing ponds at pasturable fish cultivation. Dependence of fish ponds productivity on small factors quantity can be expressed both with the formula for fishing ponds and for finishing ones. Despite the simplification these formulas provide the sufficient calculation exactness and can be used in fish breeding practice
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