Research of reaction on external influences of fishes with various physical endurance

The data of experimental researches of fishes swimming ability connection on a parameter of physical endurance (FE) with resistance to hypoxia, fluctuations of temperature and feeding activity on factory young carps and sterlets are resulted. Is concluded an opportunity of use FE as the integrated characteristic of resistance to the extreme factors of environment and parameter of viability of fishes. The opportunity of use of a parameter FE in population researches is shown.