Download FAR 2021/28 Relative abundance, size and age structure, and stock status of blue cod off Motunau in 2020

This report describes the results of the random-site blue cod (Parapercis colias) potting survey carried out off Motunau in January 2020. 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 survey in the Motunau random-site survey time series, following those in 2012 and 2016.