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Establishment of a population of marbled crab Pachygrapsus marmoratus (Crustacea: Brachyura: Grapsoidea) on the coast of northern Cotentin, Normandy, on the western English Channel

Published online by Cambridge University Press:  31 May 2012

Jean-Claude Dauvin
Jean-Claude Dauvin*
Affiliation:
Université de Caen Basse Normandie, Laboratoire Morphodynamique Continentale et Côtière, UMR CNRS 6143 M2C, 24 rue des Tilleuls, F-14000 Caen, France
*
Correspondence should be addressed to: J.-C. Dauvin, Université de Caen Basse Normandie, Laboratoire Morphodynamique Continentale et Côtière, UMR CNRS 6143 M2C, 24 rue des Tilleuls, F-14000 Caen, France email: jean-claude.dauvin@unicaen.fr
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Abstract

Since its first sighting in 2008 on the central part of the western coast of northern Cotentin, the marbled crab Pachygrapsus marmoratus has been regularly sampled in the sites where it was first reported. The presence of ovigerous females and juveniles confirmed the presence of a reproductive population in the English Channel. However, the absence of this species in other sites around the Cotentin, prospected for the survey of the progression of two invasive Hemigrapsus decapods is questionable. It is suggested that the species may have good abilities to colonize new areas, considering the larval dispersal with a long planktonic larval phase, but failed in this particular case, probably due to non-favourable conditions.

Keywords

marbled crabPachygrapsus marmoratuswestern English Channelnorthern Cotentin
Type
Research Article
Information
Marine Biodiversity Records , Volume 5 , August 2012 , e56
Copyright
Copyright © Marine Biological Association of the United Kingdom 2012

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