Download FAR 2018/33 Relative abundance, size and age structure, and stock status of blue cod from the 2017 survey in Marlborough Sounds, and review of historical surveys

This report describes the results of blue cod (Parapercis colias) fixed- and random-site potting surveys carried out concurrently in Marlborough Sounds in September/October 2017. Estimates are provided for population abundance, size and age structure, sex ratio, total mortality (Z), and spawner-per-recruit ratio. This is the eighth survey in the fixed-site survey time series that began in 1995, and the second full random-site survey.