Bull trout were once abundant in the upper Clark Fork River but historic mining and smelting activities upstream affected ...

MAMMOTH HOT SPRINGS, Wyo. (KIFI) - Yellowstone National Park, in coordination with Montana Fish, ... (9.6 miles) while biologists remove brook trout by applying an EPA-approved piscicide ...

Caleb Uerling, a fisheries biologist for Montana Fish, Wildlife & Parks, believes the high conductivity of treated Berkeley Pit water discharged into Silver Bow Creek could affect trout.

Brook trout, scientifically known as Salvelinus fontinalis—the "little salmon of the fountain"—had lost their fountains, ... The idea was to preserve the variety of Montana's wild trout, ...

MISSOULA -- While crossbreeding with other fish remains the biggest risk to Montana’s westslope cutthroat trout, new DNA testing shows the populations may be tougher than expected.

HELENA, Mont. — Montana Fish, Wildlife and Parks is destroying half a million hatchery trout because of disease concerns.

Water Temperature Brown and rainbow trout operate at their best in temperatures between 45° and 65°. Brook trout often get lumped into that ideal temperature range, but the reality is that any ...

A study Muhlfeld co-authored in 2022 found that more than one-third of Montana’s cold-water fisheries could be unsuitable for trout by 2080, costing the state nearly $200 million in lost revenue.