北大西洋鳕鱼种群数量正在恢复

Once an icon¹ of overfishing, mismanagement, and stock decline, the northern Atlantic cod² is showing signs of recovery according to new research published today in the Canadian Journal of Fisheries and Aquatic³ Sciences. This research, led by Dr. George Rose, tracks what is arguably the most important comeback of any fish stock worldwide. Studying the great northern Atlantic cod stock complex off Newfoundland and Labrador, once considered among the largest cod stocks in the world before its disastrous⁴ decline in the 1990s, Dr. Rose documents the stock's rebound⁵ over the past decade from tens of thousands to several hundred thousand tonnes and growing. 

 

According to the study, this comeback from commercial extinction⁶ has followed three distinct steps: 

 

1. After a decade and a half moratorium⁷ on fishing, improved environmental factors resulted in stock rebuilding in the southern Bonavista Corridor spawning-migration route accompanied by increases in size structure and fish condition. 

 

2. Two more northerly routes became populated with a wide size structure of fish.

 

3. Generation of strong recruitment from all three regions. The stock is positioned for this third and final step. 

 

Dr. Rose credits many equally important yet diversified⁸ factors in the continued rebuilding of this stock, "The important take-away from this study is that with favourable⁹ environmental conditions, in this case the increase in capelin as a key food for this stock, and a severe reduction of fishing, even the most decimated fish stocks have the potential to recover." Stressing the importance of responsible management, Dr. Rose continues, "Without a doubt, maintaining low removals of this stock over the past decades has been essential to recovery. While the timing¹⁰ of a full recovery remains¹¹ uncertain, continued protection from excessive fishing remains essential to achieving that outcome".

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