Population dynamics of nematode parasites of reindeer in the sub-arctic

摘要: Nematode parasite infections of semi-domestic reindeer grazing in their natural habitat northern Finland were monitored for approximately 2 years. This was achieved by monthly faecal egg counts male and female calves adult females from an experimental herd, addition to estimating the acquisition nematode infection pasture using tracer calves. The most abundant Ostertagia gruehneri worm animals reindeer. Capillaria sp. eggs detected adults, but Nematodirinae only recovered Faecal showed variations between months each species, with shedding similar numbers eggs. During year, shed more than reindeer, O. Egg late summer-autumn (July-September), whereas dominated winter (November-February). seasonal trends burdens tracers paralleled count patterns. not counts. Tracer that proportion inhibited larvae steadily increased spring early winter, followed a decline commensurate increase number parasites second summer. investigation transmission occurs continuously throughout year Finland.