ABSTRACT
Carp, in general, are stomachless fish and, as such, consume small quantities of food, resulting in more frequent evacuations than observed in fish having a stomach. In pond fisheries the problem related to providing the required ratio of essential amino acids in feeding carp and other fish species has been rather poorly studied. The dynamics of phosphorus and calcium accumulation in the body of two-year carp depend on the density of stocking. Carp should be fed with a mixture of nutritional substances constituting a balanced diet since feeding with one type of food leads to metabolic disorder and loss of weight. An important component of feed mixtures for carp can be hay meal or cone meal prepared from spruce and pine. In most cases carp brood fish are maintained on natural foods because many researchers believe that artificial feeds cause a deposition of fat in the gonads, which leads to a reduction in breeding capacity.
