On helminth fauna of genus Microtus voles (Rodentia: Muridae) from Karelia

The aim of the investigation was to study the species composition and abundance of helminthes in the hosts of insignificant numerical strength for the region - the root vole (Microtus oeconomus) and the field vole (M. agrestis). The investigations were carried out on two sites located in the central and southern zoogeographic regions of Karelia: Kaskesnavolok (M. oeconomus - 101, M. agrestis - 22, M. arvalis - 2 spm.) and Konchezero (M. oeconomus - 19, M. agrestis - 13 spm.). As a result, eight species of helminthes were detected: trematodes (Notocotylus noyeri), cestodes (Anoplocephaloides dentata, Paranoplocephala omphalodes, P. gracilis) and nematodes (Heligmosomoides polygyrus, Longistriata minuta, Syphacia nigeriana, Mastophorus muris). Specific features of helminth fauna in the voles in focus are discussed.