A review of mortality outbreaksin the Pacific oyster, Crassostrea gigas,reported since 2008 in warious European Union Member States and the related implementation of Council DirectIwe 2006/88/EC

摘要

Since 2008, widespread mortality outbreaks, killing billions of young Pacific oysters (Crassostrea gigas) have been reported in different Member States of the European Union. The Pacific oyster appears to be the only shellfish species affected by these mortalities.In the summer of 2008, abnormally high mortalities were reported from most of the Pacific oyster production areas in France and from three bays in the Republic of Ireland. Similar mortality outbreaks were again observed in 2009 in France, Ireland and Jersey. During 2010, mortality events occurred again in France, Ireland and at one location in the United Kingdom (Whitstable, Kent, UK). These increased mortality events were seasonal (April to August) and affected mainly young oysters. Reported mortalityrates varied from 40% to 95%.