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Figure 4. Total mercury concentration on wet weight (Hg, mg/kg ww) in crab ( Cancer pagurus ) caught at the wreck of U-864 (U-864), four nautical miles north of the wreck (4 nm N) and four nautical miles south of the wreck (4 nm S). Results are given for A) Claw meat of cooked and raw crab and B) hepatopancreas of raw crab and brown meat of cooked crab. Boxplots show medians, quartiles, minimum and maximum values, and small black dots are mean values. The red line in A marks the EU and Norway’s maximum level set for food safety. Where statistical significances are found (Kruskal-Wallis non-parameteric test, p<0.05), differences between groups are marked with different letters above the bars.
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