This population migrates to the mouth of the Ob during the winter due to seasonal oxygen deficiency, and swims thousands of kilometers upstream to spawn.

[citation needed] Once considered a third subspecies, "A. b. stenorrhynchus" resides in the eastern Siberian rivers and displays two life history patterns: a more abundant migratory one which swims considerable distances (sometimes thousands of kilometers) upstream from estuaries and deltas to spawn, and a nonmigratory form.

[citation needed] The species had been in steep decline in its natural range due to habitat loss, degradation, and poaching.

Because the Lena population of A. baerii completes its lifecycle in fresh water and sexually matures relatively early, it is the most common original broodstock for captive-bred specimens.

[6] In Thailand, a tropical country, it is bred in the high mountains of the north in the Royal Project, an initiative of King Rama IX and Queen Sirikit, to obtain meat and roes for consumption alongside rainbow trout.