%0 Journal Article %T ANALYSIS OF PRODUCTIVITY OF SPONGE (SPONGILLIDAE) GROWING IN WATER BODIES OF THE VOLGA RIVER DURING REGRESSION OF THE CASPIAN SEA %A Franov, N.. %A Nevalennyy, A.. %A Sokolsky, A.. %K the Caspian Sea, sea level, freshwater body, sponge colonies, ground, watercourse, freshwater sponge, the Volga delta, commercial volume %J Vestnik of Astrakhan State Technical University. Series: Fishing industry %D 2019 %N 2019 %P 8 %I Astrakhan State Technical University