Abstract
In 2017, a new non-indigenous crayfish species was found established in Europe. The captured individuals were identified as an orange morph of the Mexican dwarf crayfish Cambarellus patzcuarensis Villalobos, 1943. Fifteen adults (including three ovigerous females) and 26 juveniles were collected in a thermal pond in Budapest, Hungary. Two additional adults were caught below the pond’s outflow in the adjacent Danube River. To our knowledge, this is the first record of a C. patzcuarensis population outside North America, which is also true for the rest of dwarf crayfish (family Cambaridae, subfamily Cambarellinae). With this finding, indigenous crayfish species in Europe are now more than two-fold outnumbered by non-indigenous species. An analysis of the probability of establishment of C. patzcuarensis in continental Europe revealed that specific regions in the south of the continent are suitable areas for the establishment of the species. Moreover, as a confirmed carrier of the crayfish plague pathogen, this species should be treated with caution and eradicated if possible.
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Weiperth, A., Gál, B., Kuříková, P. et al. Cambarellus patzcuarensis in Hungary: The first dwarf crayfish established outside of North America. Biologia 72, 1529–1532 (2017). https://doi.org/10.1515/biolog-2017-0159
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DOI: https://doi.org/10.1515/biolog-2017-0159