Broad whitefish (Coregonus nasus) fish species and information / pictures of Broad whitefish - Coregonus nasus

Broad whitefish (Coregonus nasus) fish species information

Scientific Name
Coregonus nasus

Common Name
Broad whitefish

Biology
Nerito-pelagic (Ref. 58426). Lowland river and lakes (Ref. 59043) but most frequently in streams (Ref. 5723). Lacustrine and estuarine anadromous forms exist (Ref. 593). Alevins and juveniles feed on zooplankton, adults on benthos, mainly chironomid larvae and molluscs (Ref. 1998, 59043). Males reproduce for the first time in 4-8 years, females at 5-9. Adults start upstream migration in late July - August and reach spawning sites by October - November and spawn in stretches with swift current and sand-pebble bottom, often under ice. Spawning lasts 5-7 days and fish leave spawning site soon after, migrating downstream to overwinter in deeper places of lower stretches of rivers together with older juveniles. In spring, alevins drift from spawning sites downstream with flood-water and forage in floodplain lakes and oxbows where they remain until end of summer bef

Classification

Classified By
Pallas, 1776
Class
Ray-finned fishes (Actinopterygii)
Order
Salmons (Salmoniformes)
Family
Salmonids (Salmonidae)

Distribution

Region
Arctic
Distribution
Arctic: from Volonga and Pechora to Alaska.
Range
73°N - 59°N, 46°E - 102°W

Environment

Climate
Polar
Water Temperature From
Unknown °C
Water Temperature To
Unknown °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
demersal
Environment
Marine; freshwater; brackish; demersal; anadromous (Ref. 51243)
Trophic Level
3.28 s.e. 0.44 Based on food items.
Occurs in Marine / Salt water
True
Occurs in Brackish water
True
Occurs in Fresh Water
True
Occurs on Reefs
False
Is kept in Aquariums
False

Physical Size and Genetics

Maximum Length
61.0 cm
Common Length
46.0 cm
Phylogenetic Diversity Index
PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: commercial; gamefish: yes
Vulnerability
High to very high vulnerability (65 of 100)
Resilience
Low, minimum population doubling time 4.5 - 14 years (K=0.10-0.30; tm=7; tmax=15; Fec=10,000)
Threat To Humans
  Harmless
IUCN Red List Status
  Least Concern (LC)