Withal, the wild Pacific pink and chum salmons caught in the Kuril waters,meets the requirements for seafood for the content of 198
the regulated toxic elements Cd, Pb, As and Hg. The content of each element does not exceed themaximumpermitted concentrations 199
approved by the Russian standards. Differences in the content of elements in wild Pacific salmon and Atlantic salmon bred in ponds 200
represent a great scientific and practical interest. Higher concentrations of Zn and Cu in farmed salmon and of Pb in pink and chum 201
salmons fromthe Kuril waters are caused by the same factor — the geochemical conditions of the environment. However, the impact 202
conditions of the coastal waters evaluated by such tracers as zinc and copper are caused by anthropogenic activity, while the impact 203
zones in the waters of theWestern Pacific are formed under the influence of natural factors of modern volcanism and upwelling. 204