Bohman P, Edsman L, Mrugała A. 2022. Is this a Swedish signal crayfish or an alien marbled crayfish? Crayfish News 44(1): 1, 3-6. https://pub.epsilon.slu.se/27549/1/bohman-p-et-al-220414.pdf
Abstract
Without abstract. Edited excerpt:
Marble-coloured signal crayfish may superficially look similar to another non-native crayfish species, the Marmorkrebs (the marbled crayfish, Procambarus virginalis), and may therefore be incorrectly identified as that species. Both crayfish species are on the European Union’s list of invasive alien species of Union’s concern (EU regulation 1143/2014) and thus highly unwanted in Sweden. The first illegally introduced Marmorkrebs in natural waters in Sweden was found in 2012. During 2013, several additional marble-coloured morphs of juvenile signal crayfish were discovered in Sweden. Therefore, to properly manage invasive alien species and to take correct and swift mitigation actions, it is imperative to have tools for quick and unambiguous species identification.
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