%0 Journal Article %T Change in composition of periphyton of filtration elements in recirculation aquaculture systems under combined impact of UV radiation and ultrasound %A Klimov, V.. %A Nikiforov-Nikishin, D.L. %A Kochetkov, N.I. %A Gorbunov, A.. %K periphyton, biofilter, recirculation aquaculture system, ultraviolet, ultrasound, purification, relative frequency of occurrence %J Vestnik of Astrakhan State Technical University. Series: Fishing industry %D 2022 %N %P 9 %I Astrakhan State Technical University