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Table 1 Comparison of seasonal and long-term variations in metal burdens (given as ng g−1 wet weight and dry weight) of blue mussels (Mytilus edulis) from the North Sea sampling site Eckwarderhoerne

From: Seasonal variability in metal and metalloid burdens of mussels: using data from the German Environmental Specimen Bank to evaluate implications for long-term mussel monitoring programs

EckwarderhoerneMonths of annual minimum conc.Months of annual maximum conc.Annual range (ng g−1) ww/dwRange over 17 years (ng g−1) ww/dw
CobaltOct.–Feb.June102/117454.2/852
CopperOct.–AprilAug.451/3314383/2850
CadmiumNo clear seasonal variability31.2/83362.5/1125
NickelAug.–Dec.June167/2216111/1580
LeadJune–Oct. (2013 Dec.)April105/2301196/1871
MercuryNo clear seasonal variability8.42/17610.5/137
MethylmercuryNo clear seasonal variability2.52/43.92.39/34.1
ArsenicNo clear seasonal variability644/8493585/7697
SeleniumAug.–Oct.April–June166/2966215/3053
TributyltinAug.–Oct.April1.29/17.55.15/58.0