Abstract
Heavy metal concentrations in 6 terrestrial slug species inhabiting a disused Pb/Zn mine site were measured by atomic absorption spectrophotometry. Differences in metal accumulation patterns were such that the species could be ranked in order of overall metal accumulation capability: Arion hortensis < Deoceras reticulatum < Milax budapestensis < Arion ater < Deroceras caruanac < Arion subfuscus. Species belonging to the same genus were widely separated by this simple ranking scheme. The results are discussed in the context of inter-species competition and resource partitioning, and cautionary comments are made concerning the utility of slugs as biomonitors of terrestrial heavy metal pollution.