Abstract
Age composition and fecundity of taimen Hucho taimen (Pallas, 1773) spawners at spawning grounds located in left tributaries of the Lena River (Muna and Motorchuna rivers) analyzed. Spawning season take place during May–June. Spawners age varies from 8 to 17 years. Absolute fecundity of taimen from Muna and Motorchuna rivers is more than in taimen from western part of species range, and smaller than in populations from eastern part of range. Taimen individuals from river under study are part of large population of the species in the Lena River. They forage and overwinter in the Lena River and enter its tributaries including Muna and Motorchuna rivers only for reproduction. It is typical for taimen from basins of other large rivers (Kama, Yenisei, Amur). Stock abundance of taimen is not large. Spawners at spawning sets needs special protection measures.
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