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Freshwater Crayfish 6(1): 134-145 (1986)


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A report on some of the first introductions of Pacifastacus leniusculus into the UK

Hogger JB  e-mail link

Published Online: 1/21/2020


Since 1976 over 200 sites throughout the UK have been stocked with juvenile 'Signal Crayfish', Pacifastacus leniusculus (Dana). On the basis of test-fishings during 1979-1983 the success of such introductions to some sites in southern England has been assessed. The establishment of breeding populations in at least 25 % of sites in the Thames Valley has been demonstrated. Trapping at one site over a 4-year period has enabled life-history, growth and survival of this species to be monitored. Growth was found to be significantly faster than that reported from some other European populations and for the single native species, Austropotamobius pallipes (Lereb.). Survival was estimated to be about 20% after the first two years. Morphometric data has permitted size at maturity to be calculated. The development of populations of P.leniusculus is discussed in relation to the establishment of a UK market for freshwater crayfish.

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Hogger JB. (1986). A report on some of the first introductions of Pacifastacus leniusculus into the UK. Freshwater Crayfish 6(1):134-145. doi: 10.5869/fc.1986.v6.134



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   Published Online: 1/21/2020

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