91 / 112
91
Sweden Finland
Latvia
Lithuania
Grece
Italy
Swizerland
Spain
Portugal
France
Belgium
Poland
UK
Germany
NL
Croatia
Slovenia
Austria
Denmark
Hungary
Slovakia
Czech Republic
Norway
Ireland
Signal Crayfish invade Europe
Primary introductions and main
propagation route of Signal
Crayfish in Europe, from 1959
Minor direct introduction,
mostly illegal
Sources: personal communication with
Stein Johnsen; Holdich, D. M.,
et al., A
review of the ever increasing threat to
European crayfish from non-indigenous
crayfish species,
2009.
European countries possessing
wild population of Signal Crayfish