Atlantic cod, while severely over-fished, suffer equally or more from the collapse of their ocean pastures. These pastures and the plankton that sustain them have been in decline for decades, in lock step with the collapse of cod populations.
The carrying capacity of pastures whether on land or at sea has always been the primary controlling factor with respect to the 'livestock' that those pastures support.
Ocean pastures are turning into plankton deserts as high and rising CO2 in the world's air grows more grass on land. More grass growing means less dust blowing. Dust for the ocean pastures is analogous to rain for pastures on land. Without either the respective pastures loss carrying capacity.
By restoring ocean pastures by giving back the vital mineral dust, we are allowing those pastures to return to health and abundance. This has now been proven in the NE Pacific where in 2012, a vital large ocean salmon pasture was restored. Today, immediately following this work, the Pacific salmon have returned in the largest numbers in all of history.
The same restoration of Atlantic ocean fish pastures can be accomplished to being back the fish, cod, salmon, and tuna to historic abundance in the Atlantic.