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 .
Physical description for Muksun is currently being compiled.
Behavioural data for Muksun is currently being reviewed.
Distinct pairing .
Marine; freshwater; brackish; benthopelagic; anadromous . Polar; 78°N - 63°N, 58°E - 163°E central Russia (Ref.
plankton in winter (during which they do not cease active foraging) and benthic invertebrates in sum
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