Unlike open waters, ponds are reservoirs which are entirely or partly artificially shaped in this way, so that the biological processes taking place in them can be controlled and to a large extent manage their course. Therefore, they constitute an environment much more conducive to the development of an intensive fishing economy, which here takes a form similar to the breeding of other animals. One of the conditions for the effectiveness of management is the selection of the most favorable breeding facilities and the possibility to freely regulate their number. Carp has been known for a long time as a species that surpasses other values of utility features, and for this reason it has become the basis, on which the majority of pond farms build the effects of their work. In most carp ponds, however, monoculture is not the best breeding solution, because some of the food resources of the environment are in a form inaccessible to carp and can be used by species with different biological characteristics introduced for this purpose.
The need to supply many ponds with water from natural reservoirs makes it difficult to maintain the fish population with the intended species composition. Together with the water, free-living fish penetrate the flooded surface, most often economically useless, producing difficult to remove, especially in objects that are not completely drainable, fish weed populations. Therefore, among the deserving of support of the secondary species, the presence of which may contribute to increasing the efficiency of the pond, there is also a pike.
The advantages of pike, known from open waters, are even more pronounced in the ponds. Shallow and well-heated tanks create conditions conducive to rapid growth, which may be within the limits set by the potential growth indicators. In the warm climate of Ukraine or Spain, pike reared in ponds weigh 800-1000 g in the first year of life., but also in our country they can approach the weight with sufficient food supplies 500 g. However, it is more advantageous, by densifying the cast, reduce the unit weight of the fish caught in autumn to 200 g, as a result, it increases the global mass obtained by harvesting. Further thickening of the casts is applied, when, instead of the commercial fish intended for consumption, the breeder intends to obtain valuable and much sought-after material for restocking natural reservoirs in the form of summer or autumn fry. In the ponds selected for such production, the presence of general cargo is not necessary, as young pikes can reach the predicted size by feeding on larvae of beetles and dragonflies, adult beetles, bugs or tadpoles, that is, undesirable organisms in the biocenosis of the pond. Depending on the breeding method used, and also on environmental conditions, the yield in pike production is 20-60 kg / ha, and this only at the expense of food resources that are not useful for carp. Simultaneous removal of food competitors of carp contributes to their faster growth and results in further increase of the pond production by 25-40 kg / ha. (Suchowierchow, 1962). In total, the natural productivity due to the introduction of pike may increase by 45-100 kg / ha (according to Demchenko, 1963 - even up to 130 kg / ha). The threat of misdirected pressure from predators can be reduced to a minimum by appropriate adjustment of their unit size to the size of fish species jointly farmed.
The rearing of the stocking material can be carried out by pond farms by their own means - either by using artificial mash and incubating the eggs in a field hatchery or in floating hatcheries., or by natural spawning in suitable carp fishing grounds. If you use your own breeding spawners, after autumn harvesting, they should be provided with good wintering conditions. It is possible to keep them in warehouses together with carp spawners, provided, however. that the constant flow will ensure good oxygenation of the water. Fish must be handled very carefully when fishing and when transporting to wintering grounds, because the skin in places of damage is exposed to infection with thrush, which in turn causes large losses. It is also necessary to provide the winter breeding farm with general cargo in an amount of not less than 1 kg per kilogram weight of pike.