%0 Journal Article %T Changes in phytoplankton development in Middle Caspian in 2021 %A Zimina T, a.. %A Ardabyeva, A.. %A Kotelnikov, A.. %K phytoplankton, the Middle Caspian, diatoms, saprobity, abundance, biomass %J Vestnik of Astrakhan State Technical University. Series: Fishing industry %D 2022 %N %P 8 %I Astrakhan State Technical University