On an August day in 1994, former Colorado Parks and Wildlife researcher Barry Nehring walked along a riverbank in the Gunnison Gorge and noticed several small fish helplessly swimming in circles.

New Mexico wildlife managers will have fewer rainbow trout to stock in rivers and streams around the state this spring after whirling disease was detected at a state hatchery where some of the fish ...

Vincent is recently retired from his longtime post of whirling disease coordinator at the Montana Department of Fish, Wildlife and Parks. Never in his wildest dreams did he imagine that before he ...

Starting in the late 80s, rainbow trout in Colorado began dying off because of a parasite that causes whirling disease. By 1997, wild rainbows in the state had all but vanished. The disease is caused ...

SALIDA, Colo. (CBS4) - Aquatic biologist and volunteers are teaming up to fight back against whirling disease in our Colorado rivers and streams. It first impacted Colorado's rainbow trout in the ...

DENVER, June 18 (UPI) --Wild rainbow trout are returning to the mountain rivers of Colorado for the first time in more than 20 years after an invasive parasite eradicated them and some other species ...

Rainbow trout from the Gunnison River have developed an immunity to whirling disease. These fish are now being stocked in the Arkansas River near Salida in hopes they will reproduce. Colorado’s ...

Higher death rates, bigger viral loads, and more viral shedding—plastic causes big problems for rainbow trout trying to fend off a common disease. By Elise Cutts/Hakai Magazine Published Apr 10, 2023 ...

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 ...

Colorado Parks and Wildlife is hoping a rainbow trout strain developed in the Gunnison River can play an instrumental role in helping rainbows recover from the scourge of whirling disease. What the ...

New Mexico wildlife managers will have fewer rainbow trout to stock in rivers and streams around the state this spring after whirling disease was detected at a state hatchery where some of the fish ...