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Start Over Creator Šálek, Martin

2. Návrat zubra do České republiky

Creator:
Miloslav Jirků, Martin Konvička, Čížek, Lukáš, Šálek, Martin, Jan Robovský, and Dostál, Dalibor
Format:
print
Type:
article, články, model:article, and TEXT
Subject:
Věda. Všeobecnosti. Základy vědy a kultury. Vědecká práce, akademie věd, academies of science, 12, and 00
Language:
Czech
Description:
Another article describes a study entitled Return of the European Bison (Bison bonasus) to the Czech Republic published by the Czech Landscape in collaboration with scientists from the Biology Centre and the Institute of Vertebrate Biology, both of the ASCR and the University of South Bohemia. Research in the Czech Republic identified areas suitable for their return to the wild, mainly former military areas; surface areas of which range between 219-372 km2. In 2012, European bison was returned to the wild at Ralsko nature reserve, a former military training ground in Central Bohemia. and Miloslav jirků [et al.].
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

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

Creator:
Fischer, David, Paluvčík, Petr, Sedláček, František, and Šálek, Martin
Type:
article and TEXT
Subject:
mink diet, stone crayfish, prey selectivity, density-dependent predation, and Czech Republic
Language:
English
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 of the 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 summer and 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 the number of prey remains. Minks preyed selectively on sexually mature individuals, which increases the seriousness of their predation impact. This study suggests that alien mink could be an important mortality factor for stone crayfish populations on a local scale.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/