<i>MUSTELA SIBIRICA</i> IN THE MIDDLE IRTYSH ZONE
Since the 1830s, average speaker populates Priirtyshe from east to west in the forest zone, and north to south from the area of the forest-steppe and steppe zones, initially there is a slow increase in the number, then its rise with a 1.5-2-fold biotic excess capacity of the territory, and then decrease in the number and the formation of cyclic changes in the number of double intervals on average 22.5 years, the highest population density of modern column featured in the northern and central forest-less – in the forest area, the lowest – in the southern steppe and steppe. In this regard, the biotic column characterized as neutralism be complemented elements sotrapeznichestva (the badger, weasel, horem steppe, ermine, mink American) antibiosis (amensalizm with marten, fox, Korsakov, raccoon dog, competition with a sable; predation by Wolverine) in a number of habitat relationships with sable and marten are antagonistic, to understand the causes of cyclical changes in the number formed sredneirtyshskoy population column is necessary to conduct additional studies.