July 12, 2012 – While years of study have turned up ominous signs that the carp are capable of crowding out other species and changing ecosystems, the worst-case scenario scientists expect to unfold hasn’t yet been realized. Some scientists say that dire predictions about the damage carp can do may be premature. That makes the research Chick and his colleagues are conducting critical: It likely will influence how the debate over managing waterways made vulnerable by carp plays out in Congress and the courts.
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.
Water quality specialist Thad Cook grunts as a whopper belts him in the gut. His colleagues duck and dodge to avoid the missile-like fish that plop onto the deck, writhing madly until someone can grasp the slimy, slithering critters and heave them over the side.
It’s like a scene from a Hitchcock movie — and indeed the flying carp have played villainous roles in many a YouTube video. Biologists, however, fear a different kind of horror story may be taking shape underwater: a war for survival between the aggressive Asian carp newcomers and native species important to people who catch fish for a living or fun.
‘‘We suspect at some point there will be a real crash in the populations of some of these native fishes,’’ said John Chick, an aquatic ecologist with the National Great Rivers Research and Education Center on the Mississippi River near St. Louis.
While years of study have turned up ominous signs that the carp are capable of crowding out other species and changing ecosystems, the worst-case scenario scientists expect to unfold hasn’t yet been realized. Some scientists say that dire predictions about the damage carp can do may be premature. That makes the research Chick and his colleagues are conducting critical: It likely will influence how the debate over managing waterways made vulnerable by carp plays out in Congress and the courts.
Read the full story from the Associated Press at the Boston Globe.