Researchers hope environmental DNA (eDNA) can provide new information on the behaviour and abundance of native and invasive waterlife.

The species being studied include freshwater pearl mussels and also non-native American signal crayfish and Pacific pink salmon.

Sources of eDNA include shed skin, faeces and mucus.

Inverness College UHI Rivers and Lochs Institute (RLI) is involved in the new research work.

Read More – BBC Website