Biologists are saying the number of cutthroat trout in the Hoback River has surged in the years since a fish-stocking program was phased out there. The Wyoming Game and Fish Department discontinued the stocking program in 2005. The agency also discontinued a number ofother trout-stocking programs around the state at the same time. Game and Fish biologists had discovered that hatchery-raised cutthroat often were not surviving the winter. Wild trout apparently have a higher survival rate. Between 2006 and 2011, the average rate of cutthroat caught and counted on one section of the Hoback River surged almost 50% compared with the previous five years. At the same time, biologists say Hoback River cutthroat not only are more numerous, they tend to be bigger than they were before.