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Abstract
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Article Information:
Copper and Cadmium Accumulation in Populations of Littorina saxatilis from the Isle of Man Having Differential Tolerance to Zinc and Lead
E.R. Daka
Corresponding Author: Erema Ransome Daka
Submitted: 2009 Sept., 11
Accepted: 2009 Oct., 09
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Abstract:
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The accumulation of Cu and Cd from solution was studied in Littorina saxatilis from five sites
around the Isle of Man with different degrees of metal contamination. The winkles w ere exposed to increasing
concentrations of each metal (0, 0.01, 0.1, 0.5 and 1.0 mg L-1 added Cu and added Cd) after acclimation to
laboratory conditions. The experimentation was conducted in triplicate runs and after the exposure period,
tissue metal concentrations were determined by atomic absorption spectrophotometry. Different accumulation
profiles were observed for Cu and Cd. Cd accumulation was monotonic over the range of exposure
concentrations, giving linear regressions with high coefficients of determination. Cu accumulation on the other
hand was linear up to 0.5 mg L-1 but polynomial (quadratic) fits described the accumulation patterns better
when all concentrations are included. Tissue Zn concentrations showed a significant relationship with Cd
accumulation. No significant interpopulation differences in Cu accumulation were shown by Analysis of
Covariance. Significant differences in Cd accumulation were found between populations although not
reflective of the tolerance profile.
Key words: Heavy metals, bioaccumulation, gastropod mollusc, littorinid, sem i-static bioassay, metal-tolerance,
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Abstract
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Cite this Reference:
E.R. Daka, . Copper and Cadmium Accumulation in Populations of Littorina saxatilis from the Isle of Man Having Differential Tolerance to Zinc and Lead. International Journal of Animal and Veterinary Advances, (2): Page No: 92-98.
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ISSN (Online): 2041-2908
ISSN (Print): 2041-2894 |
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