The fact that the cod fish stock, which was once so vast that it played a major role in Europeans colonizing North America, hasn’t recovered since the fishery collapsed in the 1990s is in every marine biology textbook.
It's such a well known thing that we were taught about it in elementary schools here. And the knock on effects directly shaped a chunk of the rest of the country and it's history
"given the recent roll-over of the capelin quota, removing almost 15,000 t of cod’s primary food source. Their availability was the single biggest factor impeding cod's recovery, so these combined decisions put the future of both stocks in jeopardy..."