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Diadromous Least Concern 🌡️ Polar

Muksun

Coregonus muksun Pallas, 1814
Max Length
90 cm
Max Weight
13.8 kg
Lifespan
23 yrs
Trophic Level
3.5
Depth
-
Climate
Polar
Resilience
Low
Vulnerability
63.00/100
Typical Length
-
Depth Zone
-

📖 Overview

Anadromous, semi-anadromous, lacustrine, lacustrine-riverine, and riverine stocks have been reported. Most stocks are migratory, spending most of year at sea, sometimes rather far from coast . Adults stay mainly in the lower reaches of the rivers with slow current, large lakes and their tributaries, floodplain lakes, deltas and estuaries, marine waters with salinity up to 6-10%. They enter rivers in July - August and reach spawning sites by October - November. In larger rivers, moves upriver up tp 2000 km (average speed 20 km/day). Spawning occurs for the first time at 6-14 years, 47-50 cm SL. They spawn in rapids or shallows, at 1-2°C, when rivers start freezing. Adults leave spawning sites in winter . Eggs are buried in unguarded nests . Eggs hatch in 150-180 days; peak hatching usually in April. Juveniles feed on plankton in winter (during which they do not cease active foraging) and benthic invertebrates in summer . Status of threat: Important commercial species but rapidly declining .

Scientific Name
Coregonus muksun
Authority
Pallas, 1814
Habitat
Diadromous
Climate
Polar
IUCN Status
LC
Max Length
90 cm
Max Weight
13.8 kg
Lifespan
23 years
Trophic Level
3.5
Resilience
Low
Vulnerability
63.00/100
Migration
Anadromous
Salinity
30–40 ppt

🐟 Physical Description

Physical description for Muksun is currently being compiled.

🌀 Behaviour

Behavioural data for Muksun is currently being reviewed.

🦐 Diet

aquatic invertebrates
small fish
algae
detritus

🥚 Reproduction

Size at Maturity
46.3cm TL

Distinct pairing .

🌍 Habitat & Distribution

Marine; freshwater; brackish; benthopelagic; anadromous . Polar; 78°N - 63°N, 58°E - 163°E central Russia (Ref.

🌿 Ecology

Zone Preferences
🌊 Marine 💧 Freshwater 🌿 Brackish
Migration
Anadromous
Trophic Level
3.5±0.3
Food Items

plankton in winter (during which they do not cease active foraging) and benthic invertebrates in sum

📐 Morphometrics

Length–Weight Relationship: W = 0.00417 × L3.24 (TL)
Max TL
90cm
Max Weight
13,800g

🌡️ Water Parameters & Tolerance

Salinity Range
30–40ppt

🛡️ Conservation Assessment

IUCN Category
Least Concern
Assessment Date
2023

📊 Population Risk & Fisheries

Population Resilience
Low
Minimum doubling time
Fishing Vulnerability
63.00/100
High vulnerability
Trophic Level
3.5
Predator
Climate Zone
Polar
Described By
Pallas, 1814

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