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Predictions of marbled crayfish establishment in conurbations fulfilled: Evidences from the Czech Republic

1 / Miloš Buřič2 / Vojtěch Kolář34 / Martin Bláha2 / Miloslav Petrtýl1 / Pavel Franta2 / Robert Tropek35 / Lukáš Kalous1 / Adam Petrusek5 / Antonín Kouba2

1Department of Zoology and Fisheries, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, CZ-16500 Praha 6, Czech Republic

2Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses, University of South Bohemia in České Budějovice, Zátiší 728/II, CZ-38925 Vodňany, Czech Republic

3Institute of Entomology, Biology Centre, Czech Academy of Science, Branišovská 31, CZ-37005 České Budějovice, Czech Republic

4Department of Ecosystem Biology, Faculty of Science, University of South Bohemia, Branišovská 1760, CZ-37005 České Budějovice, Czech Republic

5Department of Ecology, Faculty of Science, Charles University, Viničná 7, CZ-12844 Praha, Czech Republic

Citation Information: Biologia. Volume 71, Issue 12, Pages 1380–1385, ISSN (Online) 1336-9563, ISSN (Print) 0006-3088, DOI: https://doi.org/10.1515/biolog-2016-0164, January 2017

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The marbled craynsn (Procambarus fallax f. virginalis) has become one of the potentially most dangerous nonindigenous crayfish species spreading in European countries and elsewhere. This taxon reproduces parthenogenetically and recently has been verified as a vector of the crayfish plague pathogen. Here, we report on two established populations of marbled crayfish in the Czech Republic. The marbled crayfish was observed during autumn 2015 in an urban pond connected by sewer piping with the Rokytka brook near its mouth to the Vltava River in Prague. Subsequently, three adult females, two of them having well-developed glair glands and oocytes, were captured in this pond during spring 2016, suggesting successful overwintering of the local population. Furthermore, four adult females were captured in an artificial pond at the Radovesická lignite spoil heap in the vicinity to the industrial conurbation of Bílina in summer 2016; one of them carried eggs. We tested these for the presence of the crayfish plague pathogen Aphanomyces astaci, with negative results. The introduction pathway for both populations is most likely a release from private aquaria, as these sites are popular for recreation activities. Our findings substantiate previous predictions that conurbations are likely to be the primary areas for marbled crayfish introductions.

Key words: Procambarus fallax f. virginalis; biological invasion; first record; pet trade; Marmorkrebs; urban pond; postmining site

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