Experts testify in 5-state carp lawsuit

September 7, 2010 12:37:06 PM PDT
The reliability of genetic testing to detect the presence of Asian carp is the focus of the first full day of expert testimony in a five-state lawsuit.

Michigan, Wisconsin, Ohio, Minnesota and Pennsylvania want a federal judge to close Illinois shipping locks to prevent the invasive fish from overrunning the Great Lakes.

The first witness called by the states Tuesday was a biologist who found traces of Asian carp DNA in Chicago-area waterways near Lake Michigan.

David Lodge says the DNA most likely came from live carp.

Others have suggested the carp DNA could have been transported in the ballast water of barges and so the positive test don't necessarily mean the fish is present.

But Lodge says that and other explanations are far less plausible.