Abstract
Invasion of the deer ked (Lipoptena cervi), an ectoparasitic fly commonly found in cervids, has been rapid in Finland during the last four decades. As the distribution area of this species has expanded from the south towards the northern latitudes, the associated problems have become more evident. Various animals such as horses, cattle and especially reindeer have been reported to host this parasite. Moreover, in certain areas, the deer ked causes major inconveniences for humans potentially limiting recreational activities in forests. We wanted to study if deer ked parasitism and intensity of the infection in winter time could be detected by using visual examination of the snow on cervid bedding sites and by analysing biotic samples found from the bedding sites. Our results demonstrate that chronic deer ked infection causes reddish-brown snow discolouration (host tissue fluid and deer ked faeces) on the bedding sites to the extent that parasitism can be diagnosed. Hence, we suggest that deer ked infection prevalence and range expansion could be rapidly monitored using our new practical and reliable method. In the future, bedding site analyses will likely be useful in predicting and potentially preventing the negative effects of this ecologically and socio-economically important parasite.
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Acknowledgements
We want to thank Kauko Kilpeläinen, Antti Leivo, Ari Junttila, Reijo Kotilainen and Pertti Rautio for their kind help during the experiment. This study was partly funded by the MAKERA and University of Oulu (RK). Our experiments comply with the current laws of Finland.
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Kaunisto, S., Kortet, R., Härkönen, L. et al. New bedding site examination-based method to analyse deer ked (Lipoptena cervi) infection in cervids. Parasitol Res 104, 919–925 (2009). https://doi.org/10.1007/s00436-008-1273-0
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DOI: https://doi.org/10.1007/s00436-008-1273-0