Faulkes Z. 2012. How much is that crayfish in the window? Online monitoring of Marmorkrebs, Procambarus fallax f. virginalis (Hagen, 1870) in the North American pet trade. Freshwater Crayfish 19(1): 39-44. http://dx.doi.org/10.5869/fc.2013.v19.039
Marmorkrebs were discovered by European pet owners in the 1990s. Because there is no known native population of Marmorkrebs, the distribution of these crayfish is purely the result of human activity. Marmorkrebs are now spread throughout the pet trade worldwide and are introduced species in several countries. Given that the pet trade has been the suspected or confirmed source of introduction of many introduced species, I monitored online social activity for information about the use and spread of Marmorkrebs in North America. This revealed several new jurisdictions where Marmorkrebs had not been previously reported. Several records were found in jurisdictions where the local laws prohibited the owners from having Marmorkrebs. Tracking such records could be useful in determining the risk of Marmorkrebs introductions from release by pet owners.
Keywords: marbled crayfish • pet trade