Cold? Thousands of dead fish float in Lake Michigan

January 12, 2011 “CHICAGO, Jan. 11 (UPI) — Geese and mallards are eating dead or dying gizzard shad frozen in ice in Chicago harbors or floating in open patches of water, biologists said. Thousands of dead gizzard shad, fish in the herring family, could signal a major die-off in Chicago’s harbors, the Chicago Sun-Times reported. “Gizzard shad are pretty sensitive,” Lake Michigan Program biologist Dan Makauskas said. “On the toughness scale, the herrings are pretty soft.” The shad die-off was first documented last week by Chicago fisherman Carl Vizzone, who said he noticed Canadian geese and mallards eating dying shad in open water by DuSable and Diversey harbors. “This is not normal,” he said. Other species of fish do not appear to be involved in the die-off, the Sun-Times said. Makauskas theorized the young shad may not have built up enough reserves to survive the early onset of very cold weather.”UPI
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