Animal Die-off — Worldwide/Unknown
Biologists are seeing a notable drop in the brown trout population in the Big Hole River [Beaverhead County] following a fungal outbreak. An outbreak of a fungal infection known as saprolegnia occurred on the Big Hole River in the fall of 2014. The outbreak was centered on a stretch of the Big Hole from Jerry Creek to Brownes Bridge affecting mainly spawning brown trout.
Through their spring population surveys, fisheries biologists have recorded a notable drop in the brown trout population
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