Likage of population parameters in vertebrate predators in Paazerje forest (Northen Belarus)
2012
Sidorovich, V,E., National Academy of Sciences (Belarus). The Scientific and Practical Center for Bioresources | Faibich, A.N., Belarus State Univ., Minsk (Belarus) | Ivanovskij, V.V., Vitebsk Pedagogical University, Vitebsk (Belarus)
The initial data i. e. the demography parameters used were obtaned in Paazerje Forest of the Republic of Belarus which is located to the right side from the Zahodniaya Dzvina big river in northern Belarus (Garadok, Polatsk, Rasony, Shumilina, Vitebsk, Verhniadzvinsk districts, Vitebsk region). A total of twenty six predator species from the three assemblages were involved in the analysis. Taking into account certain hardness and limitations in obtaining of initial data, the following parameters were used: population density, body mass, fecundity (for 23 species), litter size (for 23 species) and portion of juveniles (for 13 species), average longevity in adults (for 12 species), maximal longevity (for 12 species), mortality in juveniles (for 9 species) and adults (for 12 species). Most essential population parameters in predators in order to reveal some more patterns in structure and functioning of vertebrate predator-prey community were analyzed. Significant positive correlations between fecundity and litter size, reproduction (fecundity and portion of juveniles) and population density were found. There appeared no considerable differences in mortality in juveniles during litter period in the predator assemblages. It was revealed that the majority of raptor species having lower fecundity than carnivores were characterized by relatively low population density. It was found that the difference in population density of predator species and, in turn, species portions in predator assemblages and guilds mostly resulted from intensity of breeding, but not from survival rate. Significant positive correlations between body mass and mortality in adults, mean longevity in adults and maximal longevity, fecundity and mortality of juveniles was found only for the Carnivora assemblage.
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