The mechanisms of amphibia populationsí self-renewal in the high-mountains of Ukrainian Carpathians

O. Reshetylo

Institute of Ecology of the Carpathians of NAS of Ukraine
4, Kozelnytska St., Lviv 79026, Ukraine
Ivan Franko Lviv National University
4, Hrushevskyi St., Lviv 79005, Ukraine

Carpathian Newt is the most numerous amphibian species in the high-mountains of Ukrainian Carpathians while eurytopic Common Toad and Common Frog are rare in occurrence. The size (age) structure of Carpathian Newt populations is normal what is the evidence of favorable prerequisites for their self-renewal. The ecological density and sex structure of Carpathian newt and Alpine newt ensure their self-renewal under the different high-mountain habitat conditions (puddles and lakes). It is ascertained that the advantage of reproductive mechanisms of population self-renewal of the typically mountain species of amphibians in comparison with eurytopic ones is revealed under the unfavorable hydroconditions. The obtained results point out the moderate square territory, which is able to support the main vital needs of the populations of tailed amphibians in the high-mountains. The availability of prerequisites and possibilities for the safe land migrations of individuals of the investigated amphibian species is a significant mechanism for the ensuring self-renewal of their populations.

Keywords: amphibians, high-mountains, population, self-renewal, Ukrainian Carpathians

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