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Siberian sturgeon

Acipenseridae

The Siberian sturgeon (Acipenser baerii) is a species of sturgeon in the Acipenseridae family. It is most present in all of the major Siberian river basins that drain northward into the Kara, Laptev and East Siberian seas, including the Ob, Yenisei (which drains Lake Baikal via the Angara River) the Lena and Kolyma rivers. It is also found in Kazakhstan and China in the Irtysh River, a major tributary of the Ob.

Siberian sturgeon usually weigh approximately 65 kg, with considerable variability between and within river basins. The maximum recorded weight was 210 kg. As with all other acipenserids, the Siberian sturgeon are long-lived (up to sixty years), and late to reach sexual maturity (males at 11-24 years, females at 20-28 years). They spawn in strong current main stem river channels on stone or gravel substrates.