We were hoping to gain information that will be of use to sportsmen,” said Roger Bergstedt, field station supervisor at the Hammond Bay Biological Station, U.S. Geological Services.

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Nearly wiped out by pesticides in the 1960s and 1970s, double-crested cormorants are thriving. And some of the ravenous, hook-billed birds may have to pay with their lives for their species' comeback.

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A red shrimp found in Lake Erie and two other Great Lakes has scientists concerned they could threaten the food chain.  A small, half-inch creature, the red mysid is near the bottom of the food chain. Big fish eat them and they compete with small fish for plankton.

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Walleye are doing well in Saginaw Bay, but only because they're eating another sport fish: yellow perch.

Prey fish like rainbow smelt and bloaters are providing some new food for chinook salmon and lake trout in the open waters of Lake Huron, but there is still an overall prey shortage.

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