CHARACTERISTICS OF THE HELMINT FAUNA OF THE GASTRO - KISHECHEN TRACT OF THE AMERICAN MINK (<i>Mustela vison </i>Schreber, 1777), IN THE BASIN OF THE RIVER OF GOLOUSTNOYE IRKUTSK REGION
The article presents the data of many years of research carried out by the authors on the original materials collected in The Goloustnaya river basin, Irkutsk region. The main objects of feeding mink in the Irkutsk region are various mouse-like, fish and amphibians. All this determines the characteristics of its infection with helminths. The purpose of our research was to identify the species composition of helminths of the gastrointestinal tract of the American mink living in this area. The material for the study was the collection of helminth fauna obtained from the American mink mined in the period from 2010 to 2019. The study was subjected to 36 carcasses, animals. Conducted quantitative account of worms, fixation, determined the percentage of infestation and intensity of infestation. The species composition of gastrointestinal helminths was carried out using determinants. The results of the study of the species structure of helminths of the gastrointestinal tract of wild American mink ( Mustela vison Schreber, 1777) are presented.The total helminth infestation of the American mink was 58.3% of the total number of uncovered animals. The registered species composition of the American mink helminths consisted of 4 species of nematodes. The most dominant species are Capillaries putorii - infection 100%, Soboliphymu baturini - 80.9%, Molineus patents -57.1%. Subdominant species - Ascaris columnaris , infection rate 38%. Monenvasia registered 4 holes of the 21 infected, accounting for 19%, the number of burrows infested with two species of helminthes were 11 goals - 52%; 5 individuals discovered three species of helminths -23%, a mink was discovered all four types of parasites - 4.7%. On average, one infected individual had from 2 to 10 parasites. Established species of parasites are associated with the mink trophic, infection occurs when eating small mammals in particular mouse-like, amphibians, fish, which are the main component of nutrition.