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Fig. 2. Total Hg concentration in the soft tissues (gill, digestive gland, mantle
and foot) and byssus threads of the vent mussel B. azoricus kept in
seawater for 3 weeks (Control), followed by daily exposure to 20 µg
l-1 inorganic Hg for 3 weeks (Exposure) followed by transfer to
Hg-free seawater for an additional 3 weeks (Recovery). Vertical bars represent
mean concentrations ± S.E.M. (N=15) in animals
dissected at the end of each week of Control, Exposure and Recovery.
Statistical differences between tissue levels at different experimental times
was tested by one-way analysis of variance. Columns with the same letters are
not significantly different according to a S-N-K multiple range test
(P<0.05).
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