(AP) — Rain fell on empty fishing access parking lots along the Yellowstone River on Friday morning. Inside Angler's West, a fly shop here not far from the river, Rick Wollum answered a phone call. The murky water put a bit of a damper on what was an otherwise happy occasion for Wollum and other anglers and river users throughout the Paradise Valley, reported the Bozeman Daily Chronicle (http://bit.ly/2di20yv). The microscopic parasite causes proliferative kidney disease, and is believed to be new in the Yellowstone system. State biologists said low flows and high water temperatures likely made the parasite even more devastating for the Yellowstone's whitefish, and that the closure was necessary to prevent the spread of the parasite and to reduce stress on the fish. Businesses that took a hit when the river closed will lick their wounds and can begin trying to recover from their losses, and FWP biologists will begin planning how they will try to measure the overall impact. "What I'd like to see is FWP answer the question of to what extent is the population damaged," said Pat Byorth, the director of Trout Unlimited's Montana Water Project. The hierarchy is evident even in the data Montana's state wildlife agency has collected over the years. "The real tragedy is that they quit counting them," said John Bailey, the owner of Dan Bailey's Fly Shop in Livingston. [...] Scott Opitz, FWP's Yellowstone River area biologist, said they stopped gathering the data because the estimates contained inherent biases that caused them to balloon. [...] if the recapture rate is too low, the estimates are considered unreliable because it can inflate the final figure and leave a wide range of variability. Other options they are considering include trying to learn the distribution of fish of different sizes, which will give them a feel for whether any particular age class is missing from the population. Struggling whitefish p
Biologists To Measure Impact Of Yellowstone River Fish Kill
By MICHAEL WRIGHT, Bozeman Daily Chronicle, San Antonio Express-News: World
Fri, 09/30/2016 - 11:32pm
Topics: what i ap rain inside angler's west rick wollum paradise valley bozeman daily chronicle state businesses pat trout unlimited's montana water project montana john bailey dan bailey's fly shop livingston scott opitz fwp's yellowstone river struggling yellowstone yellowstone river wollum fwp biologists measure impact fish parasite population estimates data
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