Upper Yenisei grayling | |
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Upper Yenisei grayling caught by an angler | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Actinopterygii |
Order: | Salmoniformes |
Family: | Salmonidae |
Genus: | Thymallus |
Species: | T. svetovidovi |
Binomial name | |
Thymallus svetovidovi Knizhin & Weiss, 2009 | |
Thymallus svetovidovi, also known as the Upper Yenisei grayling, is a species of freshwater fish in the salmon family. It is found in the upper reaches of the Yenisei River and in western Mongolia. [1]
The body of Upper Yenisei grayling is mostly grayish-black, with dark dorsum and white abdomen. [2] There are two weakly pronounced parallel brownish yellow stripes running from the throat to the ventral fins. Beyond gill cover to the insertion of the seventh unbranched ray of dorsal fin, eight small black spots of different shapes with a diameter of 1–3 mm are scattered. [3]
The Upper Yenisei grayling can reach a maximum recorded length of 39.6 cm (15.6 inches). [4]
Salmonidae is a family of ray-finned fish that constitutes the only currently extant family in the order Salmoniformes, consisting of 11 extant genera and over 200 species collectively known as "salmonids" or "salmonoids". The family includes salmon, trout, char, graylings, freshwater whitefishes, taimens and lenoks, all coldwater mid-level predatory fish that inhabit the subarctic and cool temperate waters of the Northern Hemisphere. The Atlantic salmon, whose Latin name became that of its genus Salmo, is also the eponym of the family and order names.
The Yenisey, also romanised as Yenisei or Jenisej, is the fifth-longest river system in the world, and the largest to drain into the Arctic Ocean.
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A nuclear gene is a gene that has its DNA nucleotide sequence physically situated within the cell nucleus of a eukaryotic organism. This term is employed to differentiate nuclear genes, which are located in the cell nucleus, from genes that are found in mitochondria or chloroplasts. The vast majority of genes in eukaryotes are nuclear.
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The Montana Arctic grayling is a North American freshwater fish in the salmon family Salmonidae. The Montana Arctic grayling, native to the upper Missouri River basin in Montana and Wyoming, is a disjunct population or subspecies of the more widespread Arctic grayling. It occurs in fluvial and adfluvial, lacustrine forms. The Montana grayling is a species of special concern in Montana and had candidate status for listing under the national Endangered Species Act. It underwent a comprehensive status review by the U.S. Fish and Wildlife Service, which in 2014 decided not to list it as threatened or endangered. Current surviving native populations in the Big Hole River and Red Rock River drainages represent approximately four percent of the subspecies' historical range.
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The Kamchatka grayling is a grayling in the salmon family Salmonidae. The fish grows up to 50 cm (20 in). It is found in freshwater habitats of the Russian Far East, including the Kamchatka Peninsula, eastern part of Magadan Oblast and northwards to the southern Chukchi Peninsula.
The Mongolian grayling is a freshwater species of fish of the genus Thymallus endemic to the landlocked rivers in Mongolia, Inner Mongolia Province of China and nearby parts of Russian far east. It is considered to be the largest grayling species in the world, and hence viewed as an auspicious sign by local tribes.
Thymallus tugarinae, also known as the Lower Amur grayling, is a species of freshwater fish in the salmon family. It is found in the lower reaches of the Amur river on the border of the Russian far east and Heilongjiang Province of China. It was first described in 2007 and is sometimes mistaken for the Amur grayling.
Thymallus flavomaculatus, also known as yellow-spotted grayling, is a species of brackish-water fish in the salmon family. It is found in Khabarovsk and Primorsky Krai of the Russian Far East, as well as the Sea of Japan and the Sea of Okhotsk. They usually live near or on the bottom of the water body.