Biodiversity
December 20, 2017
An employee of the French agency for biodiversity measures a signal crayfish (Pacifastacus leniusculus), on September 14, 2017 at Audat laken during a campaign to study this species, considered an invasive one across Europe and Japan.
It was introduced to Europe in the 1960s to supplement the Scandinavian Astacus astacus fisheries, which were being damaged by crayfish plague.
Signal crayfishes (Pacifastacus leniusculus) are pictured, on September 14, 2017 at Audat lake, during a campaign by French agency for biodiversity to study species of crayfish, considered an invasive species across Europe and Japan. Jiji Press
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