Disease fears after crayfish found dead
Rare native crayfish found dead in a Norfolk river are feared to have been killed by a fungus.Three threatened white-clawed crayfish were found in the River Thet at Thorpewood caravan site, between Thetford and Diss, last week.
Rare native crayfish found dead in a Norfolk river are feared to have been killed by a fungus.
Three threatened white-clawed crayfish were found in the River Thet at Thorpewood caravan site, between Thetford and Diss, last week.
CEFAS (Centre for Environment, Fisheries & Aquaculture Science) lab in Weymouth is analysing the animals to see if they are infected with the highly virulent fungal disease Aphanomyces astaci, commonly known as crayfish plague.
Native crayfish were formerly widespread but the disease has already wiped out large populations in England and Wales.
They now exist in increasingly isolated populations in the upper reaches of rivers and the River Thet is one of the few that support a population.
Crayfish plague is carried by crayfish introduced from America, notably signal crayfish, which are not susceptible to the disease themselves.
- 1 Car flips over in crash near south Norfolk village
- 2 Norfolk hair salon named best in region at national awards
- 3 Frustration as vulnerable people in Norfolk left waiting for Covid boosters
- 4 Uproar as plans put in to turn Suffolk pub into vets
- 5 What to see in the sky in December: The 'Cold Moon' and meteor showers
- 6 Weather warning issued as wintry showers expected to cause icy conditions
- 7 Norfolk hot honey sauce 'going out in pallet fulls' across the UK
- 8 ‘This was our worst nightmare’: Locals shock after man dies in crash
- 9 Approval granted for 69 new homes in Suffolk village
- 10 Heavy rain forecast for the rest of the week in Norfolk but snow unlikely
Signals - the crayfish sometimes sold in restaurants - were introduced to consume sickly trout in fish farms.
The disease is spread by affected crayfish or, more commonly, equipment such as fishing nets, keep nets, footwear, boats and farm machinery being transferred from infected waters.
Environment Agency officials are urging anglers to ensure nets and gear are dried after each trip to avoid spreading the fungus.
Senior monitoring officer Nina Fielding said: 'This suspected outbreak is really worrying for the future of our native crayfish. There are only a small number of these endangered animals left in the Great Ouse catchment.
'We urge all river users to clean and dry or disinfect any equipment before taking it from one river or lake to another.'