Download FAR 2022/39 Relative abundance, size and age structure, and stock status of blue cod from the 2021 survey in Marlborough Sounds

This report describes the results of the blue cod (Parapercis colias) random-site potting survey carried out in Marlborough Sounds in October 2021. Estimates are provided for population abundance, size and age structure, sex ratio, total mortality (Z), and spawner biomass-per-recruit ratio. This is the third full random-site blue cod survey carried out in the Marlborough Sounds and the tenth survey overall, with nine fixed-site surveys carried out between 1995 and 2017.