OUTDOOR LIFE: It's heatin' up on the rivers

  Any avid fisherman knows the problem of Whirling Disease. This disease, which has affected so many trout populations over the years, is caused by a microscopic parasite. According to Trout Unlimited, “the disease is named for the characteristic swimming behavior that results as the parasite multiplies in the head and spinal cartilage of the infected fish. All species of trout and salmon may be susceptible to whirling disease.”