▁( S av ille - K ent , ▁ 1 8 8 8 ; ▁Cad wall ader , ▁ 1 9 9 6 ). ▁Tas man ian ▁populations ▁of ▁Australian ▁have ▁never ▁recovered ▁from ▁this ▁blow ▁and ▁remain ▁relatively ▁v estig ial . ▁▁ ▁In ▁ 1 9 5 1 , ▁some ▁years ▁after ▁the ▁last ▁sight ing , ▁the ▁species ▁was ▁given ▁full ▁legal ▁protection ▁by ▁the ▁F resh water ▁Fish eries ▁Reg ulations , ▁the ▁only ▁New ▁Zealand ▁native ▁fresh water ▁fish ▁to ▁be ▁protected . ▁ ▁In ▁August ▁ 2 0 1 8 ▁the ▁New ▁Zealand ▁Department ▁of ▁Conserv ation ▁class ified ▁the ▁New ▁Zealand ▁gray ling ▁as ▁" Ext inct " ▁under ▁the ▁New ▁Zealand ▁Th re at ▁Classification ▁System . ▁ ▁References ▁ ▁Cad wall ader , ▁P . L . ▁( 1 9 9 6 ) ▁Over view ▁of ▁the ▁Imp act s ▁of ▁Int rodu ced ▁Sal mon ids ▁on ▁Australian ▁Native ▁Fa una . ▁Australia ▁Nature ▁Conserv ation ▁Agency , ▁Can ber ra . ▁ ▁Sav ille - K ent , ▁W , ▁ 1 8 8 8 . ▁On ▁the ▁acc limat isation ▁of ▁the ▁sal mon ▁( Sal mo ▁sal ar ) ▁[ and ▁ex otic ▁tr out ▁species ] ▁in ▁Tas man ian ▁waters , ▁and ▁upon ▁the ▁reported ▁disease ▁at ▁the ▁bre eding ▁establishment ▁on ▁the ▁River ▁Pl enty . ▁Pap ers ▁and ▁Pro ceed ings ▁of ▁the ▁Royal ▁Society ▁of ▁Tas mania ▁ 1 8 8 7 : ▁ 5