Lenok (Brachymystax lenok) fish species and information / pictures of Lenok - Brachymystax lenok

Lenok (Brachymystax lenok) fish species information

Scientific Name
Brachymystax lenok

Common Name
Lenok

Biology
A slow-growing fish which inhabits rivers. A cold water fish and never goes to the ocean; finds deep cold waters during summer; can be found under the ice in late fall and winter (Ref. 12218). Feeds on larval and adult insects, amphipods, small fish, frogs, mice and salmon spawn (Ref. 593). During spawning the body turns to a dark red and the dorsal and pectoral fins change to a rainbow of colors (Ref. 12218).

Classification

Classified By

Pallas, 1773

Class

Ray-finned fishes (Actinopterygii)

Order

Salmons (Salmoniformes)

Family

Salmonids (Salmonidae)

Distribution

Region

Asia

Distribution

Asia: Siberia, Korea and North China. A subspecies, Brachymystax lenok tsinlingensis is endemic to parts of the Taibaishan Mountain in the Qinling Mountains, particularly in the Heihe River at the eastern foot, the Shitouhe River at the northern foot and the Xushui and Taibaihe rivers at the southern foot of the mountain. Status of threat: Vulnerable (Ref. 45563).

Range

Unknown

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

benthopelagic

Environment

Freshwater; benthopelagic; anadromous (Ref. 51243)

Trophic Level

3.73 s.e. 0.50 Based on diet studies.

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

70.0 cm

Common Length

55.0 cm

Phylogenetic Diversity Index

PD50 = 0.6250 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: commercial

Vulnerability

High vulnerability (60 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (tm=2-4)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated