Times (UK): Cod are doomed to disappear from the North Sea because of climate change and not just as a result of over-fishing, researchers have discovered. In the past 40 years the average temperature of the North Sea has increased by 1C with catastrophic effects on its delicate eco-systems. Species of plankton, on which cod larvae feed, have moved away in search of cooler waters. The decline in cod stocks has led to an explosion in the populations of crabs and jellyfish, on which the …