However, even these remaining refuges are under threat now from an alien invader. American signal crayfish were brought over to UK in the 1970s to be farmed for the food industry. They escaped ...

For example, one trapper in the United Kingdom has been harvesting North American signal crayfish as a means of population control for decades. In the U.S., chefs have been introducing wild boar ...

The UK native white-clawed crayfish (Austropotamobius pallipus) crayfish is under considerable pressure throughout the UK from the invasive American signal crayfish and a fungal pathogen (crayfish ...