The mackerel in the North-East Atlantic Sea has a vast distribution and is managed through international management plans.
Norwegian manages the mackerel in the North-East Atlantic together with other coastal states.Spawning areas are widely spread, and only the stock in the North Sea is sufficiently distinct to be clearly identified as a separate spawning component. Since it has not been possible to allocate catches to separate stock components, all mackerel in the Northeast Atlantic are considered to comprise a single stock (i.e. the mackerel in the Northeast Atlantic stock). The spawning stock biomass (SSB) has increased since 2002, and in 2009 the International Council for the Exploration of the Sea (ICES) classified the stock as having full reproductive capacity.
For supplementary information regarding Norwegian mackerel read more here Norwegian mackerel management (fisheries.no)