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Case Studies
Water Management Associations
Keeping Asian Carp out of the Great Lakes
A study found that in order for carp eggs to hatch, giant river systems with at least 62-mile stretches of moving water within a limited temperature range are required. However, a more recent study by the U.S. Geological Survey concluded that the eggs could hatch if the right conditions were sustained in a stream for as little as 16 miles. That suggests that other tributaries will be identified in which successful carp spawning is possible; such as the Milwaukee River, St. Joseph, Maumee and Sandusky Rivers.

A thriving population of carp might pilfer enough of the tiny plants and animals on which young and smaller fish feed to drive down the survival rates of such prized species as salmon, walleye and yellow perch, which form the base of a multibillion-dollar sport fishing industry. Walleye and yellow perch in Lake Erie already are struggling and likely won’t be helped by more competition for food.

Read about possible solutions


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Algae Bloom Warnings are Overblown - The New York Department of Environmental Conservation issued a toxic algae bloom warning for Black Lake, located in the northern part of New York. Blue-green algae blooms produce toxic microcystis, a chemical with potentially deadly consequences for animals and people who ingest it. Water samples taken from bloom areas were 20 times higher than the recreational contact suggested limit, causing the DEC to issue the warning.

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