A federal plan for keeping hungry Asian carp from reaching the valuable fish populations of the Great Lakes calls for reinforcing electrical and other barriers currently in place and for field-testing other methods, including the use of water guns and hormonal fish love potions.
Today Chicago opened the large gates that separate Lake Michigan from the river to relieve pressure on a sewer system swollen with runoff and waste. The city’s sewer problems may be stark in light of the severe rain, but they are not unique.
Last week researchers presented evidence that invasive Asian carp species may be at the Great Lakes' doorstep. The upper Lakes may not support a carp explosion, however, and the jury is out on what their impact could be. Still, scientists urge caution.
The carp’s march up the Mississippi River basin even surmounted electric barriers set up by the Army Corps of Engineers to keep them out of Chicago waterways. A new study in the Canadian Journal of Fisheries and Aquatic Sciences affirms that if the fish haven’t reached the Great Lakes yet, they’re very close.