Wales of the British Isles. Austropotamobus


Text by Pat O'Reilly, photo Melvin Grey of
Fishing In Wales. Please make sure you visit this wonderful site on fishing and wildlife conservation.

   
White-clawed Crayfish

These fascinating crustaceans
Austropotamobius pallipes were once abundant in England and Wales, but now they are found in only a few Welsh rivers and lakes. The upper River Severn and its tributaries and many parts of the River Wye still have good stocks of crayfish. A limiting factor to their abundance is their need for alkaline water for the production of the carapace, or shell.

An alien species, the signal crayfish, has been imported into Britain in recent years. With it has come a disease which our native crayfish cannot survive. For this reason, it is now prohibited to transfer signal crayfish from one place to another
.

Another photograph of this species is on the Austrian crayfish page.