Three stratified random trawl surveys completed between 2018–2020 off the west coast North Island using RV Kaharoa provided a comparison with historical surveys last carried out in 1999. The time series reveals a substantial increase in snapper biomass has occurred since 1999, but a decline in pre-recruit red gurnard was apparent. John dory biomass also trended downwards. CVs for these species were all within target. For tarakihi, CVs were higher and trends were less clear.
FAR 2022/63 Inshore trawl surveys off the west coast North Island, October–November 2018, 2019, and 2020
Report - Fisheries Assessment Report (FAR)