La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Evidence for Declines in the Native Leukoma staminea as a Result of the Intentional Introduction of the Non-native Venerupis philippinarum in Coastal British Columbia, Canada
Auteurs :	L. I. Bendell, Auteur
Type de document :	Article
Dans :	Estuaries and Coasts (37(2) MAR 2014)
Article en page(s) :	369-380
Résumé :	On the west coast of British Columbia (BC), Canada, the intertidal regions are under ever increasing pressure to be used primarily for near-bottom mariculture practices. These include seeding the foreshore with the nonindigenous Venerupis philippinarum (Manila clam) followed by the application of antipredator netting. The Manila is confamilial with the indigenous Leukoma staminea (littleneck clam), and seeding could possibly provide a competitive advantage for the Manila leading to the extirpation of the littleneck within coastal BC. Over two survey years, nine and seven farm-reference paired beaches (18 and 14 beaches) from three geographically distinct regions of BC were sampled for abundances and size class structure of the Manila and littleneck clam. Several lines of evidence suggest that the Manila is replacing the native littleneck; (1) comparison of average abundances of the littleneck versus Manila showed a significantly greater number of Manila on both farmed and reference sites across all three regions (p

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