TY JOUR TI Detection of particularly dangerous viral diseases of salmon fish (Salmo salar) using polymerase chain reaction KW viral diseases of salmon KW monitoring KW risks KW methodology KW polymerase chain reaction KW specificity KW analytical sensitivity JO Fisheries AU Perchun, A.V. AU Vorobyov, V.V. AU Melnikov, V.P. PY 2022 IS 2022 PB FSBI "TSUREN"