Percent MeHg

Criterion Importance of criterion HgT in sediment (top 1-2 cm) MeHg in sediment (top 1-2 cm) Percent MeHg in sediment Instantaneous methylation rate Sedimentary accumulation rate of Hg HgT in surface water MeHg in surface water... 

Percent MeHg in sediment Cluster and intensive Annual and quarterly, respectively... 

For piscivorous fish, we recommend that axial muscle without skin be sampled and analyzed to avoid the additional variation that would result from differing proportions of skin and axial muscle tissue among samples. Concentrations of mercury are less in skin than in axial muscle, and the inclusion of skin in a filet can reduce the concentration of total mercury or MeHg in the sample by 5 to 12 percent (Glass etal. 1998 Serdaretal. 2001). 

Values are mean concentration (ng/ml or g) for 4-6 fish at each time point. Values in parentheses are mean percent of administered dose in the given compartment at the time indicated after Intravenous administration of the compound at the following doses (in mg/kg) MeHg, 0.1 cis-Pt, 1.0. 

Since MeHg is quite lipid soluble (2), the expected localization in liver occurred (Table VII). Also as expected, due to the presence of abundant -SH groups and their known interaction with Hg, red blood cells (RBC s), muscle and renal levels were high both in terms of concentration and percent of administered dose. For most time points studied for up to 6 days, the RCB/Plasma ratio was about 20. There was some CNS penetrance of MeHg but no behavioral changes were observed in the fish. 

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