New research indicates that Lake Superior?s warming water is probably already affecting its most abundant big fish: the cold water-loving siscowet lake trout. Increasing water temperatures over the last three decades have made conditions more favorable for chinook salmon, walleye and lean lake trout but less favorable for siscowet lake trout.The study conducted by the University of Wisconsin-Madison estimates that fatty siscowets have lost about 20 percent of their historic habitat because of the temperature changes that have already occurred.
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