Fish have responded to warming ocean waters by moving north and to deeper waters, and these movements are expected to accelerate. This has resulted in a redistribution of commercial fish stocks. Warm water species are now being found in higher latitudes and tropical water will see “substantial decreases in potential catches” according to the study published Tuesday in Fish and Fisheries. About half of 36 fish stocks in the Northwest Atlantic Ocean have shifted northward in the past 40 years, a 2009 report from the Northeast Fisheries Science Center in Woods Hole, Massachusetts, said.
Similar issues have been seen in coastal fisheries. Maine has been enjoying a boom in lobster fishing as the catch in Southern New England declined from 22 million pounds in 1997 to 3.3 million in 2013. But all is not rosy in the Gulf of Maine, which is warming at the fastest rate of almost any sea. At the Portland Fish Exchange, where 90 percent of Maine’s groundfish catch is sold and stored, annual landings are now averaging 5 to 6 million pounds of cod, flounder, haddock, hake and other species, down from 80 million pounds in the early 1980s.
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