It is very likely that crayfish plague
is responsible for the disappearance of the native crayfish - which can grow up to five inches - in the Huddersfield Narrow Canal.
Stephen Semple, Balfour Beatty Managing Director for North Central, said: The spread of crayfish plague
has resulted in a rapid decline in white clawed crayfish numbers and we are delighted that, in partnership with the Environmental Agency, we have managed to preserve 3,500 crayfish whilst undertaking vital flood alleviation measures on the River Wansbeck.
The larger American species carry a crayfish plague
which has almost killed off all our white clawed variety.
Protection against the crayfish plague
, Aphanomyces astaci, in the main white-clawed crayfish populations;
AMERICAN SIGNAL CRAYFISH carry a disease, crayfish plague
, which is fatal to the British species.
This message ties together the three themes: i) crayfish plague
is the biggest threat for noble crayfish; ii) noble crayfish requires conservation actions and iii) alien species pose a threat to native ones.
research has revealed that crayfish plague
does not always kill noble crayfish rapidly.
It is now being checked to see if it was carrying the crayfish plague
The protected species is highly susceptible to pollutants and has suffered a serious population decline due to competition from introduced American crayfish species, crayfish plague
and the destruction of suitable habitat.
It's big and aggressive and eats smaller crayfish and has brought crayfish plague
, which kills the native species.