Biomass of Carp in Utah Lake Down from 90 Percent to 10 Percent

    Commercial fishing the carp out of Utah Lake has had a tremendous impact. The lake -- the largest freshwater lake in America, once the lifeline of Ute Native Americans, and an area early explorers touted as one of the most inhabitable places in the West.

   In 2009, it was estimated carp made up 90 percent of the biomass of the lake. Now, that estimate is down to 10 percent. Biomass means the weight of the fish.