maybe you're thinking of it this way
http://en.wikipedia.org/wiki/Collaps...st_cod_fishery
In November of 2006, Fisheries and Oceans Canada released an article suggesting that the unexpectedly slow recovery of the cod stock is due to inadequate food supplies, cooling of the North Atlantic, and a poor genetic stock due to the overfishing of larger cod.[15] During the summer of 2011, a study was announced to show that recovery of East Coast cod stocks around Nova Scotia showed promises of recovery, despite earlier thoughts of complete collapse.[16] It was found that initial stages of recovery began around 2005, though more time and studies were needed to study the long-term stability of the stock increase.
then they added this that I guess you miss on your own investigation.
In addition in 2010 a study by the Northwest Atlantic Fisheries Organization found that stocks in Grand Banks near Newfoundland & Labrador had recovered by 69% since 2007, though that number only equates to 10% of the original stock.[16]





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