Towards the Definition of Optimal Size-Weight Standards of Hatchery-Reared Sturgeon Fry for Restoration

Abstract

The analysis of numerous data from the literature on survival rates of Russian and other sturgeon species in the natural water bodies of Russia at natural spawning and artificial reproduction, and their determining factors, is of some interest in the reintroduction of Adriatic (Acipenser naccarii) and Atlantic (A. sturio) sturgeon species into natural water reservoirs of their former habitation. It is known that the fishing-return coefficient froth hatchery sturgeon fingerlings 1-month old and standard weight 3 g consists of 1.1-1.3 to 0.6-0.9%. The author adduces arguments for defining the optimal weight standards of hatchery-reared fry which are to be within the range froth 40 to 60 g, resulting in maximum fishing return that should be not less 40%.