TY JOUR TI THE STUDY OF THE OPERATION EFFICIENCY OF THE AUTOMATED AQUAPONIC SYSTEM DEPENDING ON THE OPERATING MODE KW recirculating KW fish recirculating system KW aquaponics KW hydroponics KW airbreathing catfish KW lettuce plants KW organic products JO Bulletin of KSAU AU Kovrigin, A.V. AU Khokhlova, A.P. AU Maslova, N.A. PY 2015 IS PB Krasnoyarsk State Agrarian University