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CHICAGO (STMW) – A bizarre scene is evolving on the Chicago lakefront, with Canada geese and mallard ducks gulping down dead or dying gizzard shad.
A major die-off of what appears to be the 2010 class is happening in Chicago harbors. Thousands, perhaps far more than that, of dead gizzard shad in the 3- to 5-inch range are frozen in the ice of Chicago harbors or floating around in open patches of water.
Even more abnormal, according to wildlife experts, was the sight of Canada geese and mallards munching on the dead fish, something not ordinarily a part of their diet.
Originally posted by kimish
I live on lake Erie (for 30 yrs) and we get mass die offs of shad and some other species every year. This is nothing out of the ordinary. Usually it has to do with lack of oxygen, I think that's been the explanation. Just about every body of water has dead zones and sometimes these fish get caught in them and because they are a prey species they like to stay away from the areas where they will get eaten. In this case most of the predatory fish, quite a few in the great lakes, take up the best oxygenated water.edit on 11-1-2011 by kimish because: (no reason given)