Abstract
In a number of countries around the world, introduced American mink are acknowledged to have had a negative effect on a number of native species, many of which are of particular conservation concern. In the UK, there has been an observed correlation between the spread of mink and the decline of the, once common and widespread, water vole. Large wetlands, such as extensive reed bed, appear to mitigate the impact of mink predation on water voles and some bird species. The present study was carried out to test the hypothesis that the observed refuge effect of reed beds arises from the way mink forage in this type of wetland. The results suggest that the interior of reed bed offers a spatial refuge for water voles, and other species, from predation by mink, because more than 60% of mink foraging activity occurred within 10 m of a main (>10 m wide) channel. Where mink ventured within the reed bed itself, they associated closely with scrub. The implication is that easily navigable channels and areas of scrub probably compromise the refuge effect of reed beds. This can be used to inform management recommendations at these sites.
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Acknowledgements
This study was funded by the People’s Trust for Endangered Species, English Nature, the Environment Agency and the Countryside Council for Wales to whom we are very grateful. We would also like to express our thanks to Don MacPherson for help with fieldwork and to Melvyn Yeandle and Sally Mills.
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Macpherson, J.L., Bright, P.W. Movements of radio-tracked American mink (Neovison vison) in extensive wetland in the UK, and the implications for threatened prey species such as the water vole (Arvicola amphibius). Eur J Wildl Res 56, 855–859 (2010). https://doi.org/10.1007/s10344-010-0383-z
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DOI: https://doi.org/10.1007/s10344-010-0383-z