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2:16pm, February 5, 2011

Summer downer for Norway cod
As climate changes, the Skagerrak coast of southeastern Norway may turn unfriendly to the commercially important Atlantic cod fishery, warns a Norwegian-U.S. research collaboration. The researchers say warmer springs may rev up growth among cod not even a year old, but warmer summers appear to stunt growth and should be increasingly likely to wipe out spring benefits. This push-crush dynamic, described January 18 in the Proceedings of the National Academy of Sciences, contrasts with earlier results suggesting that warm summers boost growth. The new analysis was made possible by an unusual series of cod surveys performed annually from 1919 through 2009. —Susan Milius

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