Download FAR 2022/41 Acoustic survey of orange roughy in ORH Mid-East Coast (ORH 2A, 2B, & 3A), June 2021

An acoustic survey of the orange roughy (Hoplosthethus atlanticus) stocks off the Mid-East Coast of the North Island was carried out in June 2021 by NIWA onboard research vessel Tangaroa. The survey was conducted using deep-towed acoustic systems which combine narrow and broadband echosounders and operate dual frequencies. Mark-identification trawls were carried out to collect biological data, track the progression of the spawning, and inform the species composition of the spawning aggregations.