REPOST FROM KRTV.COM:
Joel Evans has been fishing the same stretch of the Gunnison River in western Colorado for more than 40 years. Like most anglers in those parts, for him, one species of fish is king: the rainbow trout.
But in the 1990s, that fight between fish and fisherman shifted to one between rainbow trout and a parasite that invaded Colorado rivers. It causes whirling disease, an aquatic plague where young fish are deformed, swim in circles and die of starvation.
What does he like about them most? "There's a bit of fight involved," he said. since, Renzo DelPiccolo of Colorado Parks and Wildlife has been working to keep the rainbow trout alive through various breeding programs, but at great cost and with only limited success. He's seen a tenfold decrease in the fish's population. Ever