Morphobiological characteristics of common pike (Esox lucius L.) in small reservoirs of complex purpose in Sumy and Kyiv regions

The purpose of the work was to conduct a morphobiological analysis common pike (Esox lucius L.) from two reservoirs similar in their parameters and conditions, determine difference between populations these species due various anthropogenic factors. Sumy region has more slender body, as it is indicated by displaced dorsal (5.76) anal fins (9.19), larger body width (2.47) an enlarged tail stem (9.62), elongated head with snout upper jaw (6.10, 11.37, 4.9, respectively). Such signs may indicate that hunts for prey maximum size ac-cording specimen. indicators Kyiv are somewhat different predator makes very rapid fairly long-distance attacks on prey, despite obstacles such macrophytes other aquatic vegetation, which can be evidenced forehead (13.32), height (4.16) at nape neck (3.56). Also, big eyes (4.91) lower (9.89) speed jerks. Based biological indicators, we conclude fattened, confirmed measurements coefficients its fatness. Therefore, fleshier, which, first all, affects quality fish commodity. As re-gion, smaller fatness coefficients, greater expenditure energy obtaining food. This costliness, our opinion, related competition predatory — perch zander, reservoir, possibly reservoir itself, four times larger. We consider expedient diversify ichthyofauna Paryshkiv village, particular peaceful fish, order remove or reduce trophic predators.