In 2013, East European vole was registered in the city of Surgut. This paper is aimed at assessing the current state of East European vole population inhabiting the northern border of the West Siberian area. In 2002-2015, the researchers studied the population of these small mammals in Surgut and registered about 3,000 voles belonging to 17 species, including 81 cpecimen sampled for study. We used trapping grooves, fences made of polyethylene film and trap lines to catch the voles, later subjected to the standard examination. during the examination the researchers measured the length and weight of each animal, identified its sex, age, reproductive state, evaluated the relative abundance of animals, and brushed each animal in search for ectoparasites. After studying the spatial distribution of East European voles in Surgut, we came to the conclusion that they are more often found in the gardens and in the country (compared to habitats of the undeveloped city territory). The researchers identified the reproductive period of the East European vole inhabiting the northern border of the West Siberian area to last 5 months, from May to September. During this period, adult female voles after hibernation bear two litters, while new adult female voles bear only one. Surgut population of East European voles, compared with other parts of the habitat, is characterized by high fertility. We identified 9 species of mole mites parasiting on the voles, most of which carry tularemia infection. The materials gathered by the authors concerning the East European vole inhabiting Surgut area can be certainly used when compiling an inventory of wildlife in Khanty-Mansiysk Autonomous Area - Yugra. The data is definitely of much use to the Center for Hygiene and Epidemiology in Khanty-Mansiysk Autonomous Area - Yugra. In general, we conclude that the population of East European voles in the northern border of the West Siberian habitat is developing steadily and expanding into new habitats.
gryzuny, vostochnoevropeyskaya polevka, ekologiya, gorod Surgut
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