Lead reduces shell mass in juvenile garden snails (Helix aspersa)

摘要

In an earlier paper examining inherited tolerance to pb, the shell growth of laboratory-bred offspring of Helix aspersa from con- taminated sites was compared with that of juveniles from naive populations on dosed and undosed diets. Eight-week-old snails were fed either 500 μg g~-1 Pb or a control food in competitive trials between two populations. In the first series of trials, a parental history of exposure to Pb did not confer any advantage to either of two populations (BI and MI) competing with a naive population (LE), whether Pb was present in the diet or not.