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The Arctic cisco (Coregonus autumnalis), also known as Arctic omul (Russian: Омуль), is an anadromous species of freshwater whitefish that inhabits the Arctic parts of Siberia especially Yenisey Gulf. It can also be found in Alaska and Canada.
The ranges of the three cisco species above extend across Beringia to the Asian coasts. Of those the Arctic cisco and least cisco (=sardine cisco) are widespread through northern Siberia. In the inland waters of northern Europe, the European cisco or vendace (Coregonus albula) replaces the Siberian sardine cisco. Some of the cisco lineages are ...
Most Coregonus species inhabit lakes and rivers, and several species, including the Arctic cisco (C. autumnalis), the Bering cisco (C. laurettae), and the least cisco (C. sardinella) are anadromous, moving between salt water and fresh water.
The omul has traditionally been regarded as a subspecies of the Arctic cisco Coregonus autumnalis.However, recent genetic studies have shown it actually belongs to the circumpolar Coregonus lavaretus-clupeaformis complex of lake whitefishes, which also has other members in Lake Baikal, [1] and it is now considered its own species within Coregonus. [2]
Coregonus Linnaeus, 1758 – whitefishes and ciscoes, which according to some authors number more than 60 species. [5] There are differing opinions on the classification of some species within the genus and the overall number of species. [2] Some species in Arctic regions of Asia and North America forage in marine waters. [2]
The Shortnose Cisco was once abundant on the Great Lakes, but overfishing and invasive species such as sea lamprey, zebra and quagga mussels, alewives and round gobies dwindled the fish's numbers ...
Coregonus sardinella, known as the least cisco or the sardine cisco, is a fresh-and brackishwater salmonid fish that inhabits rivers, estuaries and coastal waters of the marginal seas of the Arctic Basin, as well as some large lakes of those areas.
[1] 60% of all evaluated fish species are listed as least concern. The IUCN also lists 37 fish subspecies as least concern. Of the subpopulations of fishes evaluated by the IUCN, 44 species subpopulations have been assessed as least concern. This is a complete list of least concern fish species and subspecies evaluated by the IUCN.