Spink, Joanna and Rowe, Joanna (2002) The current distribution of signal and native crayfish in the Broadmead Brook, Wiltshire. Freshwater Forum, 19, pp. 3-10.
Signal crayfish (Pacifastacus leniusculus) have existed in the upper reaches of Broadmead Brook in Wiltshire since 200 individuals were introduced at West Kington in 1981. The population has expanded upstream and downstream since this introduction, however, giving rise to concerns that it may potentially threaten the native crayfish population further downstream. Signal crayfish can act as a vector of crayfish plague - a disease caused by the fungus Aphanomyces astaci Schikora which results in almost complete mortality to the native, white-clawed crayfish Austropotamobius pallipes. The native crayfish in Broadmead Brook have not yet succumbed to crayfish plague and are currently free of the disease. However, as signal crayfish appear to out-compete the native species, the native population could still be under threat. In this article, we highlight the findings of previous crayfish surveys on Broadmead Brook and describe work undertaken in summer 2001 to map the current distribution of native and signal crayfish. Finally, options for controlling the spread of signal crayfish are discussed.
|Item Type: ||Article|
|Title: ||The current distribution of signal and native crayfish in the Broadmead Brook, Wiltshire|
|Personal Creator/Author: |
|Journal or Publication Title: ||Freshwater Forum|
|Page Range: ||pp. 3-10|
|Issuing Agency: ||Freshwater Biological Association|
|Uncontrolled Keywords: ||Introduced species; Freshwater crustaceans; Ecological distribution; Surveys; Trap fishing; England; Broadmead Brook; Pacifastacus leniusculus; Austropotamobius pallipes|
|Item ID: ||4725|
|Depositing User: ||Hardy B Schwamm|
|Date Deposited: ||08 Jan 2011 13:55|
|Last Modified: ||29 Sep 2011 17:58|
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