River Derwent: Agency removes illegal crayfish trap

Yabby - Healthy Rivers

American crayfish trapping fails to control invasive species

TAS Recreational Fishing Guide 2012-13 by Andrew Coates - Issuu

River Derwent: Agency removes illegal crayfish trap

Victoria and Tasmania Fishing Monthly - March 2014 by Fishing

Native fishermen from US claim Canada's DFO illegally removed

Men fined for illegally catching crayfish in Derby

Diversity, Free Full-Text

Crayfish in the Derwent River!

American crayfish trapping fails to control invasive species

White-clawed crayfish The official blog for the North York Moors

White-clawed crayfish The official blog for the North York Moors

River Derwent: Agency removes illegal crayfish trap - BBC News

Embattled Dales crayfish get a helping hand

The Wildlife of the Lune Region