The streams of Britain host some unwelcome guests. Jeama Stanton's study counts the environmental cost of letting plague-carrying American crayfish loose into our rural waterways.

She has spent three years studying the behaviour of the crustaceans but says there's a lot to be learnt from her work - introducing foreign species always has serious consequences for our animals and the habitats in which they live.

Find out more about Jeama and what she does on her Interview page or try exploring the C.V., Lifestyle and Science sections.

Content last updated: 01/08/2006