Simulation of the threshold effect in efficiency of reproduction of Russian sturgeon in the Volga river

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Acceptable balance between reproduction and mortality from various factors could dramatically disturbed because of the impermanence in reproductive potential, that showed a retrospective analysis of data on spawning sturgeon in the Volga. Article considers development of the model of population process with the existence of different levels of reproductive efficiency. We proposed a system of ODE, which formalizes the influence of the growth rate on mortality in juvenile period and take into account the loss of unfertilized eggs. In a computing environment was received discrete-continuous dynamical system which allowed assessing the effects of a sharp decrease in reproductive efficiency. This effect leads to the presence minimum acceptable size for the survival of Acipenser gueldenstaedtii spawning population.

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Threshold effects in the dynamics of populations, degradation of the volga sturgeon, discrete-continuous dynamical systems

Короткий адрес: https://sciup.org/148202199

IDR: 148202199

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