Captured Asian Carp Likely Didn't Swim North
Jim Garvey studied that fish at Southern Illinois University. He says his research doesn't prove the fish has a large population near Lake Michigan.
GARVEY: If they're starting to catch smaller, younger fish, then obviously there should be a concern that there are populations that are basically sustainable up there.
Garvey says the 20-pound fish likely spent most of its six years of life near Lake Michigan, but it wasn't born there. He says it's possible the carp was used as bait years ago, then dumped in Lake Calumet.