TY JOUR TI Features of the hydrobiocenosis of the biofilter of a recirculating aquaculture system KW aquaculture KW recirculating aquaculture system KW biofilter KW hydrobiocenosis KW periphyton KW species structure KW abundance JO Vestnik of Astrakhan State Technical University. Series: Fishing industry AU Khamitova, M.. AU Kalaida, M.. PY 2026 IS 2026 PB Astrakhan State Technical University