''Salvelinus tolmachoffi'', also known as Yessey lake charr, is a freshwater species of fish in the

salmon Salmon () is the common name In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of ...

family. It is endemic to

Lake Yessey Lake Yessey () is a large freshwater lake in Evenkiysky District, Krasnoyarsk Krai, north-central part of Russia. The lake is located in the Central Siberian Plateau, to the west of the course of the Kotuy river. A tributary of the Kotuy flo ...

of the Khatanga river basin of the

arctic The Arctic ( or ) is a polar region located at the northernmost part of Earth. The Arctic consists of the Arctic Ocean, adjacent seas, and parts of Canada ( Yukon, Northwest Territories, Nunavut), Danish Realm ( Greenland), Finland, Iceland ...

Russia. In 2007, the fish was listed as

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and inv ...

by IUCN due to over-fishing and poor management of the water body.

Description

Yessey lake charr can grow to a recorded maximum length of 37.0 cm (14.6 inches). The fish lives at or near the bottom of the lake. The head and back of the fish are blue-black, while the sides of the body are dark-gray with a golden tint and the belly is pale yellow. There are numerous red spots on the sides of the body. The species feed on

gammarus ''Gammarus'' is an amphipod crustacean genus in the family Gammaridae. It contains more than 200 described species, making it one of the most species-rich genera of crustaceans. Different species have different optimal conditions, particularly ...

copepods Copepods (; meaning "oar-feet") are a group of small crustaceans found in nearly every freshwater and saltwater habitat. Some species are planktonic (inhabiting sea waters), some are benthic (living on the ocean floor), a number of species have p ...

, chironomid larvae, and fish. Yessey lake charr spawn in autumn, from the second half of October to December, in coastal areas with depths of 2.5 - 4 m.

References

{{Taxonbar, from=Q5850397 Salvelinus Freshwater fish of Asia Fish described in 1926