The purpose of this subchapter is to put together the pieces from the previous subchapter and discuss the overall dynamics of the ecosystem in the Barents Sea, including how it is affected by human activities and climate variability.

This work summarizes information on parasites of 91 species of fish from personal knowledge and available literature (Karasev, 2003). There are 10 types of parasites found in the fish of the Barents Sea: Mastigophora (Kinetoplastomonada, Parasitomonada), Sporozoa (Coccidea), Microsporidia (Microsporea), Myxozoa (Myxosporea), Ciliophora (Peritricha), Plathelminthes (Monogenoidea, Gyrocotylida, Cest...

Atlantic and Arctic water masses are two major hydrographical domains in the Barents Sea, which determine the zoogeographical species composition in the ecosystem. The zoogeographical groups may be represented as “Mainly Arctic”, “boreal” or “Arctic-boreal”. Due to variability in distribution of Arctic and Atlantic waters in the Barents Sea alterations in distribution and relative abundance of arc...

In surveys of 18 species of seabirds, 82 species of helminthes were recorded,  28 trematoda species, 37 cestoda species, 12 nematods, 5 species of the order Acanthocephala. There are 74 species of helminthes in birds from the Murman coast, and 39 of them are characteristic for that area only. There are 10 (1) species from Novaya Zemlja and 28 (7) from Svalbard.  6 species of helminthes are found a...