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Copper and Cadmium Accumulation in Populations of Littorina saxatilis from the Isle of Man Having Differential Tolerance to Zinc and Lead

Author(s): E.R. Daka

Journal: International Journal of Animal and Veterinary Advances
ISSN 2041-2894

Volume: 1;
Issue: 2;
Start page: 92;
Date: 2009;
Original page

Keywords: Heavy metals | bioaccumulation | gastropod mollusc | littorinid | sem i-static bioassay | metaltolerance

The accumulation of Cu and Cd from solution was studied in Littorina saxatilis from five sitesaround the Isle of Man with different degrees of metal contamination. The winkles w ere exposed to increasingconcentrations of each metal (0, 0.01, 0.1, 0.5 and 1.0 mg LG1 added Cu and added Cd) after acclimation tolaboratory conditions. The experimentation was conducted in triplicate runs and after the exposure period,tissue metal concentrations were determined by atomic absorption spectrophotometry. Different accumulationprofiles were observed for Cu and Cd. Cd accumulation was monotonic over the range of exposureconcentrations, giving linear regressions with high coefficients of determination. Cu accumulation on the otherhand was linear up to 0.5 mg LG1 but polynomial (quadratic) fits described the accumulation patterns betterwhen all concentrations are included. Tissue Zn concentrations showed a significant relationship with Cdaccumulation. No significant interpopulation differences in Cu accumulation were shown by Analysis ofCovariance. Significant differences in Cd accumulation were found between populations although notreflective of the tolerance profile.
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