Abstract
The article presents data on morphological and physiological parameters of first-matured females of Russian sturgeon and its hybrid form with a Siberian species, grown in artificial conditions by LLC “Akvatrade”, operating in the Lower Volga region (Astrakhan region). It was found that Russian sturgeon juveniles adapt less satisfactorily to the low winter temperatures of the aquatic environment in comparison with hybrid forms with the Siberian species. As for the offspring obtained from hybrid females, their resistance to low winter temperatures of the aquatic environment was higher, most likely due to features inherited from the Siberian species.
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