%0 Journal Article
%T Present distribution and future spread of louisiana red swamp crayfish Procambarus clarkii (Crustacea, Decapoda, Astacida, Cambaridae) in Britain : Implications for conservation of native species and habitats R¨¦partition actuelle et future propagation de l¡¯¨¦crevisse rouge de Louisiane Procambarus clarkii (Crustacea, Decapoda, Astacida, Cambaridae) en Grande-Bretagne : implications pour la conservation des esp¨¨ces indig¨¨nes et des habitats
%A Ellis A.
%A Jackson M.C.
%A Jennings I.
%A England J.
%J Knowledge and Management of Aquatic Ecosystems
%D 2012
%I EDP Sciences
%R 10.1051/kmae/2012022
%X The Louisiana red swamp crayfish Procambarus clarkii is highly invasive. It is now common in Europe where it is causing problems to native wildlife and structural damage to habitats. Procambarus clarkii was first recorded in Britain in 1991 and is currently found in the Hampstead Heath ponds and Regents Canal in London, as well as a small lake 15 km outside of Greater London. This paper considers how conditions in Britain affect the life cycle, breeding habits and potential range expansion of P. clarkii. Results of trapping surveys are presented in an effort to map the current distribution of P. clarkii and predict which areas it could colonise in the future. The ecological impact of potential colonisation is discussed by considering the impact P. clarkii has in mainland Europe. It is concluded that P. clarkii is likely to spread from Regents Canal into the nearby Brent, Crane, Colne, Lee and Thames catchments within 50 years. This time would be reduced significantly if further deliberate or accidental introductions by humans occur since this is deemed a far greater risk than natural expansion. P. clarkii is expected to have a negative impact on aquatic ecosystems in Britain and therefore tighter enforcement is needed to slow the spread of this species. L¡¯¨¦crevisse rouge de Louisiane Procambarus clarkii est tr¨¨s envahissante. Elle est maintenant fr¨¦quente en Europe o¨´ elle est ¨¤ l¡¯origine de probl¨¨mes ¨¤ la faune indig¨¨ne et de dommages structurels sur les habitats. Procambarus clarkii a ¨¦t¨¦ signal¨¦e la premi¨¨re fois en Grande-Bretagne en 1991 et se trouve actuellement dans les ¨¦tangs Hampstead Heath et le Regents Canal ¨¤ Londres, ainsi que dans un petit lac ¨¤ 15 km du Grand Londres. Le pr¨¦sent document examine comment les conditions en Grande-Bretagne affectent le cycle de vie, les traits de la reproduction et l¡¯¨¦tendue potentielle d¡¯expansion de P. clarkii. Les r¨¦sultats de recherches par pi¨¦geage sont pr¨¦sent¨¦s en vue de cartographier la distribution actuelle de P. clarkii et de pr¨¦dire quels domaines elle pourrait coloniser ¨¤ l¡¯avenir. L¡¯impact ¨¦cologique de la colonisation potentielle est discut¨¦ en tenant compte de l¡¯impact P. clarkii en Europe continentale. Il est conclu que P. clarkii est susceptible de se propager ¨¤ partir de Regents Canal dans les milieux proches de Brent, Crane, Colne, Lee et le bassin de la Tamise dans les 50 ans. Cette vitesse d¡¯expansion devrait ¨ºtre sensiblement acc¨¦l¨¦r¨¦e si les introductions d¨¦lib¨¦r¨¦es ou accidentelles par l¡¯homme se produisent car cela est consid¨¦r¨¦ comme un risque beaucoup plus grand que l¡¯expansion nat
%K freshwater crayfish
%K Procambarus clarkii
%K conservation
%K British isles
%K invasive species
%K ¨¦crevisses d¡¯eau douce
%K Procambarus clarkii
%K conservation
%K les Britanniques
%K esp¨¨ces envahissantes
%U http://dx.doi.org/10.1051/kmae/2012022