La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Structure and dynamics of an invasive population of the red swamp crayfish (Procambarus clarkii) in a Mediterranean wetland
Auteurs :	Massimiliano Scalici, Auteur ; Francesca Gherardi, Auteur
Type de document :	Article
Dans :	Hydrobiologia (583 JUN 2007)
Article en page(s) :	309-319
Résumé :	This study analyzes the population structure and dynamics of an invasive population of Procambarus clarkii (Girard, 1852) in a Mediterranean wetland using the Bhattacharya's and Von Bertallanfy's analytical methods. The main purpose was to collect biological data necessary for the management of this nuisance species. A maximum of five age classes were identified for both sexes, three of which being composed of a few or zero individuals. Age classes were classified into two subgroups-spring (SpL) and summer (SuL) lines-on the basis of the different hatching periods. Individuals of SpL showed a faster growth rate and reached a larger body size than those belonging to SuL, probably because they were able to grow for a longer time. No between-sex differences were found in growth patterns except for the asymptotic length (L), which was reached faster by the females. Other population properties were analyzed, such as a high mortality rate, a maximum longevity of 4 years, and a low mean life-time (

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