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This contribution presents the first record of the noble crayfish  Astacus astacus  (Linnaeus, 1758) in Euboea (Evia) Island, Greece. The crayfish was found during a fish monitoring expedition in the upper Mesapios River, in a reach that maintains flow throughout the year, while most of the river length desiccates completely during the dry season. The finding of  A. astacus  in an intermittent river of Euboea Island expands the species geographical range and calls for immediate conservation actions to protect its habitat and preserve this vulnerable population.

knowledge and management of aquatic ecosystems

In search of the unexpected: the first finding of an islandic population of the noble crayfish <i>Astacus astacus</i> in Greece redefines its distribution

In search of the unexpected: the first finding of an islandic population of the noble crayfish Astacus astacus in Greece redefines its distribution