The analysis of the Polar cod - the Arctic ichthyofauna largest representative role - in the Barents Sea trophic ecosystem net is given in the article. Its percentage and share of consumption by the most numerous sea-birds-ichthyophagists (в rünnich's guillemot and northern fulmar) are shown. The calculations that can serve as the basis for the Barents Sea bio-resources usage forecast in order to minimize damage to the ecosystem and to preserve biodiversity conservation area are given.
polar cod, seabirds, the Barents Sea, trophic ecosystem net, nutrition
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