TRAVERSE CITY, Mich. — A federal study of 18 potential aquatic links between the Great Lakes and Mississippi River watersheds says none of them are likely pathways to the lakes for Asian carp.

The U.S. Army Corps of Engineers released the study Friday. It's among reports the agency is producing as it develops recommendations for preventing Asian carp and other invasive species from crossing between the two watersheds.

Experts say the easiest way for Asian carp to attack the lakes is through a navigational canal near Chicago that helps connect the Mississippi River with Lake Michigan.