Mercury Concentrations, Fish Condition, And ... - Mass.Gov

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Robert Maietta ..... Recovery for spiked fish samples and precisions of the analyses were 103.3 9.1% and 4.0 3.8% (means 1 std. dev.) .... Data for Center Pond, Yokum Pond and Ashfield Pond were not included because of ..... 30% since 1970 (Swain, 2000), northern pike tissue mercury concentrations have decreased ...

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