The present state of spawning population and natural reproduction of stellate sturgeon Acipenser stellatus in the Volga River
2007
Veshchev, P.V. | Dovgopol, G.F. | Ozeryanskaya, .V.
Data obtained during investigations carried out in 1986-2005 show the abundance of the spawning population of stellate sturgeon Acipenser stellatus, the number of spawners migrating to spawning grounds, qualitative characteristics and rate of natural reproduction of the population in the upper, middle and lower spawning zones of the Volga River. It was established that the main factors restricting stellate sturgeon breeding were the number of fish that ascended the river above the fishing zone and water content in the Volga River during the period of low water in summer. Based on the analysis of long-term data, recommendations are presented in regard to conservation of the northern Caspian stellate sturgeon population
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