%0 Journal Article
%T Estimating population size of the red swamp crayfish (Procambarus clarkii) in fish-ponds (Brenne, Central France) Estimation de la taille de populations d¡¯¨¦crevisse de Louisiane (Procambarus clarkii) dans des ¨¦tangs de pisciculture (Brenne, Central France)
%A Coignet A.
%A Pinet F.
%A Souty-Grosset C.
%J Knowledge and Management of Aquatic Ecosystems
%D 2012
%I EDP Sciences
%R 10.1051/kmae/2012019
%X The red swamp crayfish, Procambarus clarkii, was discovered in 2007 in the ¡°Parc naturel r¨¦gional (PNR) de la Brenne¡± (France). Ten colonized sites have been identified in the park to date, including two new sites discovered in 2011. The present study aims at establishing a protocol suitable for estimating the population size of P. clarkii by the use of a Capture-Mark-Recapture (CMR) technique in a chain of five connected fish-ponds. Results show different cohorts of individuals among seasons and fish-ponds. However, trapping effort was not efficient enough to obtain an accurate estimate of the population size of this species in a fish-pond larger than 2   3 ha. On the other hand, the adopted protocol appeared useful to assess, in smaller fish-ponds, the effect of intensive trapping and other control methods on P. clarkii populations. L¡¯¨¦crevisse de Louisiane, Procambarus clarkii, a ¨¦t¨¦ r¨¦cemment d¨¦couverte (2007) dans le ¡°Parc naturel r¨¦gional (PNR) de la Brenne¡± (France). Dix foyers d¡¯infestation sont ¨¤ pr¨¦sent identifi¨¦s dans le parc, dont deux tr¨¨s r¨¦cemment (2011). La pr¨¦sente ¨¦tude a pour but d¡¯¨¦tablir un protocole efficace pour estimer la taille des populations de P. clarkii par la technique de Capture-Marquage-Recapture (CMR), au niveau de 5 ¨¦tangs piscicoles organis¨¦s en chaine. Les r¨¦sultats montrent diff¨¦rentes cohortes d¡¯individus variant selon les saisons et selon les ¨¦tangs. L¡¯effort de pi¨¦geage effectu¨¦ dans cette ¨¦tude s¡¯av¨¨re insuffisant pour des ¨¦tangs sup¨¦rieurs ¨¤ 2 ou 3 ha. Pour les ¨¦tangs de plus petite taille, un tel protocole semble ¨ºtre plus adapt¨¦ et permettrait d¡¯¨¦valuer l¡¯impact du pi¨¦geage intensif et autres m¨¦thodes de contr le sur les populations de P. clarkii.
%K Procambarus clarkii
%K fish-ponds
%K mark-recapture
%K population size estimation
%K Procambarus clarkii
%K ¨¦tangs
%K marquage-recapture
%K taille de la population
%U http://dx.doi.org/10.1051/kmae/2012019