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Chicago canal not the only possible carp invasion route

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The fight against an Asian carp invasion of the Great Lakes so far has been mostly focused on the Chicago Sanitary and Ship Canal, an artificial link between Lake Michigan and the Mississippi River basin.

There are 18 other potential connections between the Great Lakes and Asian carp-infested Mississippi River basin stretching from northern Minnesota to western New York, though they are considered medium- to low-risk for a carp invasion because the connections are vastly smaller, farther from existing carp populations or typically occur only when big floods hit.

At the top of that list of secondary pathways is an area in northern Indiana called Eagle Marsh, which separates the Mississippi basin's Wabash River from the Maumee River basin that feeds Lake Erie. The two watersheds have a history of merging in extreme rains, so to reduce the threat of carp making the jump into Lake Erie, the federal government has erected a fence between them.  more...



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