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Transfer of cadmium from plant leaves and vegetable flour to the snail Helix aspersa: bioaccumulation and effects.

Authors
  • Scheifler, R
  • Gomot-de Vaufleury, A
  • Badot, P M
Type
Published Article
Journal
Ecotoxicology and Environmental Safety
Publisher
Elsevier BV
Publication Date
Sep 01, 2002
Volume
53
Issue
1
Pages
148–153
Identifiers
PMID: 12481871
Source
Medline
License
Unknown

Abstract

Juvenile Helix aspersa snails were exposed for 4 weeks to fresh rape leaves (Brassica napus), contaminated by simulating superficial deposits of increasing concentrations of cadmium (Cd). The Cd concentration in leaves was 0.1 in control and 38.4, 93.1, and 177.2 microg x g(-1) (dry mass) in Cd-treated food. The concentration in snail tissues increased with increasing Cd concentrations in the food. The bioaccumulation factors ranged from 4.8 (control) to 2.4 (highest exposed group), indicating a biomagnification of Cd in this food chain. The growth of the snails treated with Cd was reduced by 17, 24, and 43% respectively, compared to the control group. Comparison of these results with those obtained with snails exposed to similar Cd concentrations in a vegetable flour revealed that accumulation and effects were relatively consistent, demonstrating a comparable bioavailability of Cd in the two diets. Tests using growing H. aspersa snails exposed to metals in flour or fresh leaves can be useful for risk assessment purposes.

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