Recent invasion of the Japanese oyster drill along the French Atlantic coast: identification of specific molecular markers that differentiate Japanese, , and European, , oyster drills

Author: Garcia-Meunier Pascale   Martel Corine   Pigeot Jacques   Chevalier Guillemette   Blanchard Gérard   Goulletquer Philippe   Robert Stéphane   Sauriau Pierre-Guy  

Publisher: Edp Sciences

E-ISSN: 1765-2952|15|1|67-71

ISSN: 0990-7440

Source: Aquatic Living Resources, Vol.15, Iss.1, 2002-03, pp. : 67-71

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Abstract

The direct amplification of length polymorphism technique (DALP) has been used to distinguish species-specific banding patterns in two marine gastropod oyster drills (Linnaeus, 1758) and (Récluz, 1851). is the European oyster drill, common along all European coasts. , the Japanese oyster drill, was recorded in oyster growing areas of the Marennes-Oléron Bay (SW France) for the first time in 1995. This new biological invasion could lead to an increase, which must be evaluated, in the predation risk for cultivated species i.e. oysters and blue mussels, and for littoral fishing resources along the French Atlantic coasts. As a result, since specific identification of early life stages of both species (egg capsules and juveniles) was previously found to be both difficult and unsure using only morphological criteria, four and two specific molecular markers were identified and sequenced. These markers will facilitate the assessment of respective ecological impacts (reproductive patterns, abundance and spatial distribution of juveniles), resulting from the exotic species versus the native species and will allow us to analyse with certainty demographic profiles of the two oyster drill populations.