Invasive species of fish, collectively known as Asian carp, may prove more of a concern to American river systems than previously thought.
The study found that the carp are being found in systems previously thought to be untenable for the species. Despite the recent droughts in the United States the fish have spawned in narrower and shallower bodies of water than was thought possible.
Current predictions are based on native habitats, but new models should be formulated based on changing facts. The concern is that the aquatic pests will spread through Northern America if they reach the Great Lakes.