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Specimens of Peromyscus maniculatus and Blarina brevicauda from a remote, natural ecosystem were analyzed by atomic absorption spectrophotometry for Pb, Cu and Cd concentrations. Mean wet weight concentration of Pb, Cu, and Cd was 2.7 ? 0.13, 3.2 ? 0.16 and 0.4 ? 0.01 pg/g respectively for P. maniculatus and 2.6 ? 0.12, 2.9 ? 0.92 and 0.4 ? 0.01 jg/g respectively for B. brevicauda. A significant direct relationship was observed between Pb concentration and weight in both species and for Cd in B. brevicauda suggesting age-dependent accumulation. Cu concentration in both species was variable and displayed no such correlation.
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Schlesinger et al. (1974) studied this question.
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