Why should fishery managers not view cod stocks such as capelin and mackerel?

Fishery managers should not view cod stocks such as capelin and mackerel as these species are not cod. Cod are a distinct group of fish that includes species like Atlantic cod, Pacific cod, and Greenland cod, all of which are in the family Gadidae. Capelin and mackerel, on the other hand, are not members of the cod family but belong to different families, Osmeridae and Scombridae, respectively. They have different biological characteristics, ecological roles, and population dynamics compared to cod, and thus should be managed separately to ensure their sustainable exploitation.