Poaching threatens the species which provide livelihoods for thousands around the lake.
The acids are seen as vital to decrease development of cardiovascular diseases and promote good health.
Lyubov Morekhodova glides over the pure ice on skates made by her father not long after World War Two.
Irkutsk officials say supplies to major city could run out but Russian government says more analysis of environmental impact needed.
Fresh water supply crisis looms in parts of Siberia as critics accuse hydroelectric firm of 'excessive drainage' from lake.
Russian government proposes intriguing solution if Ulaanbaatar halts plans for hydropower dams on the Selenga River.