Dec 08, 2009 — Earlier this month, DNA of the Asian carp was discovered downstream of a multi-million dollar electric barrier designed to repel the giant fish from the Great Lakes. The barrier was built in a canal in Chicago that connects the Mississippi River with Lake Michigan. Asian carp have been swimming up the Mississippi for years. The DNA discovery set in motion a frantic response from state and federal agencies. The canal was poisoned with rotenone last Friday when the barrier had to be turned off for maintenance. Thousands of fish were killed, but only one asian carp was among them. The governor of Michigan has vowed legal action to have shipping locks closed to seal off the canal. Jennifer Nalbone is with the regional environmental group, Great Lakes United. She told David Sommerstein the Asian carp will crowd out native fish and devastate the recreational fishing industry, and damage the entire ecosystem.