A recent study published in BioInvasions Records by Lipták et al. (2024) documents the first occurrences of the invasive red swamp crayfish (Procambarus clarkii) in Slovakia. This species, native to the southern United States and northern Mexico, is the most widespread and invasive crayfish species globally. Known for its adaptability, it can outcompete native biota and disrupt local ecosystems.
Thanks to collaboration with Slovakian colleagues, solid data were gathered on its establishment in two natural localities, both fed by thermal springs. The first site is near Turčianske Teplice in Central Slovakia, downstream of a commercial facility for aquatic ornamentals (most likely the source of the population via escapes). This population is, so far, relatively restricted in its distribution. The second site is located approximately 150 km south, near Komárno, and recent findings suggest a rapid spread in the region, likely due to animal releases by aquarium enthusiasts.
Both populations are numerous and well-established. Since their discovery in spring 2023, monitoring and management efforts have been implemented to reduce their numbers and curb their spread. To date, tens of thousands of individuals have been caught, thanks to the coordinated efforts of local partners, including Veľká Fatra National Park and the Dunajské luhy Protected Landscape Area.
Detail information can be found in the original paper: Lipták, B., Prati, S., Oficialdegui, F.J., Apfelová, M., Pekárová, S., Kautman, J., Janský, V., Kouba, A., 2024. First populations of invasive red swamp crayfish flourish in Slovakia. BioInvasions Records 13: 825–841. https://doi.org/10.3391/bir.2024.13.3.20
Written by: Assoc. Prof. Antonín Kouba
