Popular Yellowstone River closes after thousands of fish die

http://phys.org/news/2016-08-popular-yellowstone-river-thousands-fish.html

Montana wildlife officials indefinitely closed a 183-mile stretch of the Yellowstone River and hundreds of miles of other waterways Friday, barring all fishing, rafting and other activities to prevent the spread of a parasite believed to have killed tens of thousands of fish.

Fishing guides and rafting operators who run businesses along the river said the move could be catastrophic to the area's sizable outdoor industry, which depends heavily on the busy summer season.
The closure could last for months if river conditions don't improve and fish keep dying, according to officials from Montana Fish, Wildlife and Parks. It extends to hundreds of miles of waterways that feed into the Yellowstone, including the Boulder, Shields and Stillwater rivers.