Two researchers at the University of Applied Sciences Northwestern Switzerland (FHNW) have bred white-clawed crayfish and reintroduced the highly endangered species to the wild. +Get the most important news from Switzerland in your inbox The young crayfish serve as food for fish and other aquatic organisms, Raphael Krieg, who initiated the project with Armin Zenker, told Keystone-ATS. Just after hatching, crayfish are barely a centimetre long. Protected breeding makes it possible to overcome this perilous phase of life. Читать дальше...