Distribution of Introduced Marine Mollusca in British Columbia Waters

Abstract

The distribution of a number of species of lamellibranchs and gastropods that have been introduced into British Columbia waters largely as a result of oyster cultural operations is discussed. The dispersal routes and barriers are indicated in relation to known hydrographic conditions and circulation patterns. The problems of spawning, larval movements, metamorphosis, and spat survival are examined.The introduced species that are discussed are Crassostrea gigas, Mya arenaria, Venerupis japonica, Ocenebra japonica, Teredo navalis, Nassarius obsoletus, Purpura clavigera, Urosalpinx cinerea and Batillaria cumingi.