Due to fish movements parasite has spread outside of its natural range and has devastated salmon stocks on over twenty Norwegian rivers. Currently, the parasite is believed to be present in Norway, Sweden, Russia, Finland, Denmark, France, Germany, Spain and Portugal. Experiments have shown that Scottish salmon stocks have no natural immunity to the parasite and if it is introduced to this country then there are likely to be profound economic and ecological consequences. Attempts to eradicate the parasite from infected rivers in Norway have proved logistically difficult, hugely expensive and often unsuccessful.

GS can survive away from a host for several days in a damp environment e.g. anglers landing nets, reels, clothing or canoeing equipment. The parasite is born pregnant with this offspring also already pregnant (the so-called ‘Russian Doll’ effect) therefore only a single specimen needs to be introduced for an epidemic to ensue. It is vital that the parasite is kept out of the Kyle of Sutherland area and all members of the Association need to take responsibility for ensuring we remain disease free. If you fish outside of the British Isles please ensure that you disinfect your equipment on your return. If you encounter a foreign angler on the Kyle or one of our Lochs politely enquire if they are aware of the parasite and if they have taken steps to ensure their equipment is not contaminated.