Predation of the alien American mink, Mustela vison on native crayfish in middle-sized streams in central and western Bohemia

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F09%3A00010366" target="_blank" >RIV/60076658:12310/09:00010366 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Predation of the alien American mink, Mustela vison on native crayfish in middle-sized streams in central and western Bohemia
Original language description
The impact of predation by alien American mink (Mustela vison) on endangered stone crayfish (Austropotamobius torrentium) was examined in middle-sized streams in central and western Bohemia for the duration of two years. The most frequent food source ofthe American mink were crustaceans. followed by mammals, amphibians and fish. Crustaceans consisted entirely of one species, the stone crayfish. which was represented in 82% of all collected mink droppings. Analysis of the relative composition of summerand winter diet showed no significant differences between these periods. The identification of predation of the American mink on stone crayfish was based on the collection of prey remains during the period monitored. Predation rates at particular localities were highly variable (0.85-21.5% average = 7.4%), and decreased significantly in winter periods. The use of crayfish seems to reflect their spatial availability, suggested by the good correspondence between the population density and
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
EG - Zoology
OECD FORD branch
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Publication year
2009
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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