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<p>This June 13, 2012, photo shows an Asian carp, jolted by an electric current from a research boat, jumping from the Illinois River near Havana, Ill. Scientists at a network of field stations on the Mississippi and Illinois rivers are using electric currents to stun fish so they can be scooped up and examined. Researchers have been monitoring fish populations on the rivers for many years and now are looking for evidence that native species are being affected by the arrival of invasive Asian carp. (AP Photo/John Flesher)</p>

<p>This June 13, 2012, photo shows an Asian carp, jolted by an electric current from a research boat, jumping from the Illinois River near Havana, Ill. Scientists at a network of field stations on the Mississippi and Illinois rivers are using electric currents to stun fish so they can be scooped up and examined. Researchers have been monitoring fish populations on the rivers for many years and now are looking for evidence that native species are being affected by the a…

July 14, 2012

Stories this photo appears in:

Research murky on Asian carp invasion
July 14, 2012 9:15 p.m.

Research murky on Asian carp invasion

HAVANA, Ill. - As scientists aboard a research boat activate an electric current, the calm Illinois River transforms into a roiling, silvery mass. Asian carp by the dozen hurtle from the water as if shot from a gun, soaring in graceful arcs before plunging beneath the surface with splashes resembling tiny geysers.