rainbow trout

State biologists have been tagging trout across southwest Montana to better understand the population’s health after years of declines. They report encouraging signs, but populations are still below average due in large part to an extended drought.

In the '90s, whirling disease hit trout populations hard in Montana, at one point leading to a 95% decline in rainbow trout in the Madison River. It sparked concern among biologists, anger in tourist towns and even played a role in a murder mystery novel. It also inspired this week's question: What's happening with whirling disease and other threats to trout?

Trout populations in the Big Hole river increased slightly after hitting historic lows last year, according to preliminary estimates released by Montana Fish Wildlife and Parks.

The Swan River will see new catch and release fishing regulations this year, following a change by Montana’s Fish and Wildlife Commission. The new rule attempts to address concerns over low trout numbers, however some say there isn’t data to back that up.

Montana wildlife officials will begin studies this year to get to the bottom of a historic trout population crash in the Jefferson Basin. Montana wildlife officials have also created a new web portal for residents to submit reports of dead and diseased fish.

The director of Montana Fish, Wildlife & Parks (FWP) committed the full resources of the department in response to a historic population crash in some of southwest Montana’s most iconic trout fisheries.

Montana Fish, Wildlife & Parks (FWP) is proposing to remove non-native trout species in Cooney Creek, a tributary of the upper Swan River in northwest…

Glacier National Park released an environmental assessment Friday for a proposal to kill off non-native fish in a remote area. Biologists say that could…

Starting next week Yellowstone National Park staff will begin chemically treating the upper Gibbon River, continuing a project to remove nonnative fish in…

A microscopic parasite killing tens of thousands of fish forced state wildlife officials to close a portion of the Yellowstone River Friday…