Assessing the overall concentrations of toxic elements found in chumspecimens that were caught in the ocean, it is important to 131
emphasize that they are below theMPC levels determined in Russia and are also lower than in the standards adopted by Canada and 132
the United States. 133
The same authors (Kelly et al., 2008) identified a broad range of trace elements in bred andwild salmons, including thewild chum 134
fromthe inshore waters of British Columbia. They demonstrated that the concentration of non-essential elements ranged from0.001 135
ppmfor Cd to 1 ppmfor As. Pb and Hg concentrations ranged between 0.01 ppmand 0.05 ppm. The content of the essential elements 136
Cu and Zn fluctuated between 1 and 5 ppm.While the concentrations of zinc in local chum and pink salmon (2.24–3.34 ppm of wet 137
weight) were the same as in the salmon of the Canadian Pacific coast, the concentration of copper was significantly lower than in the 138
British Columbia salmons. Hg concentrations in local salmons varied from0.07 to 0.15 ppm, and lead concentrations ranged from0.30 139
to 0.95 ppm — that is, they were more than an order of magnitude higher. Concentrations of As in local and Canadian samples were 140
almost identical, while the content of Cd was significantly higher in local salmons. 141
It is important to emphasize that foreign authors, provide data on the content of trace elements in fish fillets. However, in 142
discussing the results of Table 2, we consider the entire fish carcass. 143
For a correct comparison of our results with the data reported in the works of foreign authors, we also determined the 144
concentrations of elements in themuscles of Pacific salmon and compared themwith the published data for Atlantic salmon—salmon 145
reared in cages (Tables 3 and 4)