Temperature–Salinity Stress and Mercury Uptake in the Fiddler Crab, Uca pugilator

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Abstract
Uptake of 203Hg was determined in gill and hepatopancreas tissue from fiddler crabs (Uca pugilator) maintained under six temperature–salinity regimes. Although the total mercury was relatively constant under all experimental conditions, the percent of mercury in each of the tissues was markedly different. At higher temperatures the crabs seem able to transport mercury from gill tissue to the hepatopancreas more effectively than at lower temperatures. This could be a factor in the toxicity of mercury to fiddler crabs at low temperature.

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