Recent reports from the Marine Institute have confirmed the presence of a plague caused by a water mould (fungal like organism) affecting the native white-clawed crayfish in Annies River at Lough Carra, Co. Mayo.
White-clawed crayfish are a globally threatened species protected under the Wildlife Act. They are found in rivers, streams and lakes around the country.
Ireland hosts some of the largest surviving populations of the rare, white-clawed crayfish in Europe.
Outbreaks since 2015, have shown that this disease results in the complete elimination of white-clawed crayfish populations in affected waters. It is not a risk to humans, pets or livestock but it difficult to manage and control in affected waters.
Minister for Nature, Heritage and Biodiversity, Christopher O’Sullivan in a statement today says users can protect our waterways and wildlife by following the Clean, Dry and Check method.
He continues saying “the National Parks and Wildlife Service is leading efforts and working with stakeholders around Lough Carra to understand the impact of this disease and engage with people using the river.I’m asking all water users to implement the Check Clean Dry principles to help stop it from spreading. Please check, clean and thoroughly dry all equipment and clothing that comes in contact with the water before entering water again.”
It is not known how the disease has spread to Lough Carra area but it was most likely through contaminated equipment.
Water users are reminded to:
Check equipment and clothing for any signs of mud, plant or animal material that has been in contact with the water or river banks. Remove anything you find and dispose of safely.
Clean everything thoroughly, ideally using hot water. Pay close attention to areas that are damp or hard to access.
Dry for as long as possible, if you cannot dry your equipment, consider using an appropriate disinfectant. The spores are active for up to three weeks.
Dogs should be washed if they swim in one river or lake before they enter another system.
Water users should review guidance on www.invasives.ie/crayfish for more information.
Members of the public who see dead crayfish in the area are asked to inform the NPWS by sending reports to info@npws.govie or by logging records directly to the National Biodiversity Centre at www.invasives.ie.
