Essential and non-essential trace elements in fish consumed by indigenous peoples of the European Russian Arcticстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 11 ноября 2020 г.
Аннотация:In present study, the analyses of essential [copper (Cu), cobalt (Co), selenium (Se) and zinc (Zn)] and nonessentialelements [mercury (Hg), lead (Pb), cadmium (Cd) and arsenic (As)] in 7 fish species consumedby the indigenous people of the European Russia Arctic were conducted. The Nenets Autonomous Region,which is located in the north-eastern part of European Russia, was chosen as a Region of interest. Withinit, the Nenets indigenous group (n ¼ 6000) constitutes approximately 10% of the total population. Nearlyall of the Nenets live a traditional life with fish caught in the local waters as a subsistence resource.We found that northern pike contained twice the amount of Hg compared with roach, and 3e4 timesmore than other fish species commonly consumed in the Russian Arctic (namely, Arctic char, pinksalmon, navaga, humpback whitefish and inconnu). Fish Hg concentrations were relatively low, butcomparable to those reported in other investigations that illustrate a decreasing south-to-north trend infish Hg concentrations. In the current study, northern pike is the only species for which Hg bioaccumulatedsignificantly. In all fish species, both Cd and Pb were present in considerably lower concentrationsthan Hg. The total As concentrations observed are similar to those previously published, andit is assumed to be present primarily in non-toxic organic forms. All fish tissues were rich in the essentialelements Se, Cu and Zn and, dependent on the amount fish consumed, may contribute significantly to thenutritional intake by indigenous Arctic peoples. We observed large significant differences in the molarSe/Hg ratios, which ranged from 2.3 for northern pike to 71.1 for pink salmon. Values of the latter <1 mayincrease the toxic potential of Hg, while those >1 appear to enhance the protection against Hg toxicity.