Structure of the northern red-backeв vole (myodes rutilus) population in the gradient of the oil pollution

About the authors:

Valeriy O. Tadzhidinov, Post-graduate Student, Department of infectious and parasitic diseases, Northern Trans-Ural State Agrarian University (Tyumen)
Sergey N. Gashev, Dr. Sci. (Biol.), Professor, Head of the Department of Zoology and Evolutionary Ecology of Animals, University of Tyumen; gsn-61@mail.ru

Abstract:

The article presents the results of a research into the structure of the northern red-backed vole (Myodes rutilus) population in the territory contaminated by oil. The studies have been conducted in the territory of Pravdinsky oilfield (Nefteyugansky region, KMAO-Yugra). The studied territory was divided into four zones, by the degree of soil contamination level. The study was conducted in the time period of 9800 trapdays and 414 specimens of the northern red-backed vole were caught. The level of oil pollution was found to influence the northern red backed vole population level in the area. According to the research a decrease in the total abundance and populated area indexes in the oil polluted areas was observed together with an increase in animal aggregation level. The «settled» specimens were not found in the territories with a high level of oil pollution. The age and sex structure depends on the level of contamination. Females and juvenile specimens prevail on the polluted areas.

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