Brachymystax lenok

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Brachymystax lenok
Brachymystax lenok.jpg
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Brachymystax
Species:
B. lenok
Binomial name
Brachymystax lenok
(Pallas, 1773) [2]

Brachymystax lenok, the sharp-snouted lenok, [3] is a salmonid fish distributed in rivers and lakes in northeastern Asia. It formerly included the blunt-snouted lenok, but recent authorities typically treat the latter as a separate species, B. tumensis , based on differences in morphology and genetics. [3] [4] [5] [6]

As presently defined, the sharp-snouted lenok is widespread in central and eastern Russia, and also found widely in northern Mongolia, locally in northeastern Kazakhstan (Irtysh Basin) and northeastern China (Amur Basin). [3] [4] [7] The blunt-snouted lenok (B. tumensis) is found widely in southeastern Russia and more locally in northeastern and central parts of the country, as well as northeastern Mongolia (Amur Basin), northern China and Korea. [3] [7] Although the two generally are found in separate areas, there are also regions where their ranges overlap such as the Amur Basin. [3] [4] [6]

The sharp-snouted lenok is widespread overall, but some populations, especially in China, have declined due to overexploitation and pollution. [8] This species grows to a total length of 70 cm (28 in). [2]

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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". 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.

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The Amur, or Heilong Jiang, is the world's tenth longest river, forming the border between the Russian Far East and Manchuria/Northeastern China. The Amur proper is 2,824 kilometres (1,755 mi) long, and has a drainage basin of 1,855,000 km2 (716,000 sq mi). Including its source river Argun, it is 4,444 km (2,761 mi) long. The largest fish species in the Amur is the kaluga, attaining a length as great as 5.6 metres (18 ft). The river basin is home to a variety of large predatory fish such as northern snakehead, Amur pike, taimen, Amur catfish, predatory carp and yellowcheek, as well as the northernmost populations of the Amur softshell turtle and Indian lotus.

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<i>Stenodus leucichthys</i> Species of fish

Stenodus leucichthys is a species of freshwater whitefish in the family Salmonidae. In the strict sense its natural distribution is restricted to the Caspian Sea basin, and it is known as beloribitsa. The beloribitsa is now considered extinct in the wild, but survives in cultured stocks. The nelma, a more widespread species of Eurasian and North America, is sometimes considered its subspecies.

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<span class="mw-page-title-main">Manchurian hare</span> Species of mammal

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<span class="mw-page-title-main">Lenok</span> Genus of fishes

Lenoks, otherwise known as Asiatic trout or Manchurian trout, are salmonid fish of the genus Brachymystax, native to rivers and lakes in Mongolia, Kazakhstan, wider Siberia, Northern China and Korea.

<i>Cyprinus rubrofuscus</i> Species of fish

Cyprinus rubrofuscus, the Amur carp, is a species of cyprinid fish, and is the wild form of the well-known koi. It is widespread in the fresh waters of eastern Asia, native to China, Korea, Russia, Vietnam and Laos from the Amur to Red River basins, and has also been introduced outside its native range. It is known for its muddy flavor and boniness, hence, it is not commonly eaten by locals except when stewed.

<span class="mw-page-title-main">Amur sculpin</span> Species of fish

The Amur sculpin, also known as the Ussuri sculpin, is a species of freshwater ray-finned fish belonging to the family Cottidae, the typical sculpins. This species is found in eastern Asia where it is found in Russia, China and Mongolia - in the Amur River basin and some adjacent territories. The Amur sculpin grows to a maximum published total length of 20 cm (7.9 in). This species is the only known member of its genus, Mesocottus. According to the result of a pilot phylogenetic analysis, the freshwater Mesocottus is a sister lineage to the Cottus clade.

Salvelinus inframundus, also known as Orkney charr is a cold-water fish in the family Salmonidae which is endemic to Scotland.

<i>Brachymystax tumensis</i> Species of fish

Brachymystax tumensis, the blunt-snouted lenok, is a salmonid fish distributed in rivers and lakes in Eastern Asia. It was formerly included in the more widespread species Brachymystax lenok, but more recent research based on differences in morphology and genetics have justified a distinction of the two species.

The Alashanian pipistrelle is a species of bat in the family Vespertilionidae. It is found in China, South Korea, Mongolia, Japan, and Russia.

Brachymystax savinovi is a salmonid fish species endemic to Markakol Lake and adjacent rivers in eastern Kazakhstan. It was formerly included in the more widespread species Brachymystax lenok.

References

  1. Mamilov, N. (2020). "Brachymystax lenok". IUCN Red List of Threatened Species . 2020: e.T156767039A156767061. doi: 10.2305/IUCN.UK.2020-3.RLTS.T156767039A156767061.en . Retrieved 22 March 2022.
  2. 1 2 Froese, Rainer; Pauly, Daniel (eds.) (2012). "Brachymystax lenok" in FishBase. February 2012 version.
  3. 1 2 3 4 5 Kartavtseva, I.V.; Ginatulina, L.K.; Nemkova, G.A.; and Shedko, S.V. (2013). Chromosomal study of the lenoks, Brachymystax (Salmoniformes, Salmonidae) from the South of the Russian Far East. Journal of Species Research 2(1):91-98.
  4. 1 2 3 Bo, M. A.; and Jiang, Zuo-fa (2007). Genetic diversity and relationship between two species of Brachymystax in Wusuli River revealed by microsatellites. Journal of Fishery Sciences of China 14: 39-45.
  5. Balakirev, E.S.; Romanov, N.S.; and Ayala, F.J. (2014). Complete mitochondrial genome of blunt-snouted lenok Brachymystax tumensis (Salmoniformes, Salmonidae). Mitochondrial DNA 27: 1-2 https://www.tandfonline.com/doi/abs/10.3109/19401736.2014.919487
  6. 1 2 Froufe, E.; Alekseyev, S.; Alexandrino, P.; and Weiss, S. (2008). The evolutionary history of sharp- and blunt-snouted lenok (Brachymystax lenok (Pallas, 1773)) and its implications for the paleo-hydrological history of Siberia. BMC Evolutionary Biology 8: 40.
  7. 1 2 Ratschan, C. (2013). Trout's Siberian Siblings . Chasing Silver 1: 86-96.
  8. Yingzhe, X.; Yan, S.; and Yiyu, C. (2006). DNA sequence variation in the mitochondrial control region of lenok (Brachymystax lenok) populations in China. Chinese Biodiversity 14(1): 48-54.