Montana Fish, Wildlife and Parks is closely monitoring recent discoveries of dead fish along the upper Yellowstone River.
Official test results won’t be available until next week at the earliest and biologists don’t have enough information yet to determine the cause of these localized fish kills.
Last summer the PKD outbreak on the upper Yellowstone River led to an emergency closure by FWP and the death of thousands of mountain whitefish, which are native to the river. Historically low flows in the river coupled with high water temperatures last summer helped to exacerbate the impacts of PKD on whitefish.
Conditions this year are much different – water temperatures have remained below 70 degrees at Livingston even during the hottest parts of July and flows are above average for this time of year.
LINK (via: MFWP)