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Asian carp have been making their way up the Mississippi River system for years after escaping from fish farms and wastewater treatment ponds in the southern U.S.They’re knocking on the door of the Great Lakes, and a number of people are concerned about what could happen if carp become established in the region.In this five-part series, we’ll take a look at what officials are trying to do to keep the fish out, what might happen if carp get in, and why some people want to turn carp into a business opportunity.

Michigan loses legal round in Asian Carp battle

Bighead Carp Lake Calumet June 2010.jpg

The state of Michigan has suffered another legal setback in its effort to keep Asian Carp from reaching the Great Lakes.  

A federal judge in Chicago has denied a request by Michigan and several other states to order the closure of canals which link Lake Michigan to the Mississippi River basin. Asian Carp are a voracious invasive species.  The carp have devastated Mississippi River fish populations.  

“The court agreed that Asian Carp are indeed a threat," says Joy Yearout, a spokeswoman for Michigan Attorney General Mike Cox, '"But the judge also ruled the actions the federal government has taken over the last several months prove they are addressing the threat enough to make it not immediate enough to require a court order."

Federal agencies have stepped up construction of electric barriers to keep Asian Carp from passing into Lake Michigan.  Other methods are also being studied. 

The states may continue their legal fight.  They are also asking President Obama to order the canals closed.

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