The following piece from the National Biodiversity Data Centre highlights some of the threats to our indigenous crayfish population and how anglers can help protect them through following Check, Clean, Dry protocols:
This week, 22–28 June, marks Invasive Species Week, an annual campaign that raises awareness of invasive species and the actions we can all take to protect native wildlife and habitats. It is also an ideal opportunity for the angling community to help safeguard one of the island of Ireland’s most important freshwater species, the White-clawed Crayfish.
The White-clawed Crayfish is the only crayfish species native to the island of Ireland and our waterways support some of the most significant remaining populations in Europe. These crayfish play a vital role in healthy freshwater ecosystems, helping to recycle nutrients and providing an important food source for other wildlife.
One of the greatest threats to this species is Crayfish Plague, a highly infectious disease that is almost always fatal to White-clawed Crayfish and can spread rapidly through rivers, lakes and connected waterways. Crayfish Plague can also be transported unknowingly between waterbodies on wet angling equipment, landing nets, waders, boots, boats and clothing. This means anglers have a crucial role to play in preventing its spread.
The biosecurity message is simple, Check, Clean, Dry. Before leaving a waterbody, check all equipment for mud, plants and debris. Thoroughly clean gear and allow it to dry completely before using it elsewhere. These simple steps can make a significant difference in protecting vulnerable crayfish populations.
Anglers should also remain vigilant for signs of an outbreak. If you observe White-clawed Crayfish that are dead or dying, please report the sighting immediately to invasives.ie/reportsightings/ (Ireland) or invasivespecies.ni.co.uk/report-sighting/ (Northern Ireland)
During Invasive Species Week, we encourage all anglers to adopt good biosecurity practices and help protect our unique freshwater biodiversity. By working together across the island of Ireland, we can reduce the risk of spreading Crayfish Plague and help ensure the long-term survival of our native White-clawed Crayfish.
For more information on Crayfish Plague, identification guidance and reporting procedures, visit: https://invasives.ie/species-alerts/crayfish-plague-disease/
