Factors affecting deer ked Lipoptena cervi prevalence and infestation intensity in moose Alces alces in NorwayReportar como inadecuado




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Parasites and Vectors

, 5:251

First Online: 12 November 2012Received: 31 August 2012Accepted: 01 November 2012

Abstract

BackgroundThe deer ked Lipoptena cervi, a hematophagous ectoparasite of Cervids, is currently spreading in Scandinavia. In Norway, keds are now invading the south-eastern part of the country and the abundant and widely distributed moose Alces alces is the definitive host. However, key factors for ked abundance are poorly elucidated. The objectives of our study were to i determine deer ked infestation prevalence and intensity on moose and ii evaluate if habitat characteristics and moose population density are determinants of deer ked abundance on moose.

MethodsIn order to identify key factors for deer ked abundance, a total of 350 skin samples from the neck of hunted moose were examined and deer keds counted. Infestation intensity was analyzed in relation to moose age and sex, moose population density and landscape characteristics surrounding the killing site.

ResultsDeer ked infestation prevalence was 100%, but infestation intensity varied from 0.001 to 1.405 keds-cm. Ked intensity was highest in male yearlings ~1.5 years and positively associated with longitude and Scots pine Pinus sylvestris dominated habitat and negatively associated with bogs and latitude. Moose population density during autumn showed a tendency to be positively associated, while altitude tended to be negatively associated with ked intensity.

ConclusionsDeer keds exploit the whole moose population within our study area, but are most prevalent in areas dominated by Scots pine. This is probably a reflection of Scots pine being the preferred winter browse for moose in areas with highest moose densities in winter. Ked intensity decreases towards the northwest and partly with increasing altitude, probably explained by the direction of dispersal and reduced temperature, respectively. Abundant deer ked harm humans and domestic animals. Moose management authorities should therefore be aware of the close relationship between moose, deer ked and habitat, using the knowledge as a management tool for locally regulating the ked burden.

KeywordsBogs Deer ked GIS Habitat Latitude Longitude Moose density Prevalence Infestation intensity Scots pine Electronic supplementary materialThe online version of this article doi:10.1186-1756-3305-5-251 contains supplementary material, which is available to authorized users.

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Autor: Knut Madslien - Bjørnar Ytrehus - Hildegunn Viljugrein - Erling J Solberg - Kent Rudi Bråten - Atle Mysterud

Fuente: https://link.springer.com/







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