Répartition et évaluation du stock de la crépidule (Crepidula fornicata), entre le cap Fréhel et le Mont Saint-Michel (Manche Ouest)

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Identifiant documentaire 9-3854
Identifiant OAI oai:archimer.ifremer.fr:3854
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Auteur(s): Blanchard, Michel
Mots clés North of Brittany side scan sonar spread analysis stock assessment cartography Crepidula fornicata Slipper limpet Bretagne nord sonar à balayage latéral causes de prolifération évaluation de stock distribution géographique Crepidula fornicata Crépidule
Date de publication 01/03/1999
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Droits de réutilisation info:eu-repo/semantics/openAccess

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This report deals with results obtained in 1995 and 1996 through a grant of Council of Brittany. The distribution and stock assessment of the slipper-limpet population (Crepidulafornicata) is analysed, in the near shoreline between Cap Fréhel and Mont-Saint-Michel. Several cruises allowed to use side-scan sonar, underwater video and scuba diving observations. Hamon grab has been used for quantitative sampling. Several direct observations were done ashore for complete informations. On this seaside of Brittany, it is observed that the population is mainly concentrated along the coast and main densities are found in the bay of Cancale, around deep oyster beds. Total fresh biomass is estimated about 149 000 metric tons. Local reasons and consequences of such a spread are discussed. NOT CONTROLLED OCR
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