Patagonian grenadier is distributed in the Southeast Pacific and Southwest Atlantic, from southern Chile to Argentina. This species, also known as Chilean hoki, has been assessed as a single stock unit, supported by genetic studies (Stewart and Hanselman 2012), however, some studies suggested a high mixture between Pacific and Atlantic populations (Schuchert et al. 2010)(McKeown et al. 2015). Moreover, individuals could migrate from the southwest Atlantic and southeast Pacific to northern Chilean Patagonia to reproduce (Veroes et al. 2023). Therefore, the population structure remains unresolved (Gorini et al. 2021). There have been joint workshops between Chilean and Argentine research institutes but there are two separate assessment units: Patagonian grenadier - Argentine and a Patagonian grenadier - Chilean (GIUSSI et al. 2016).

Two management areas are defined for the hoki fishery in Chilean waters: the central-south unit, from Valparaíso - Los Lagos (V-X regions) and the southern-austral unit including Aysén - Magallanes (XI and XII regions).