The sport fish, introduced in lakes over the past 100 years, have outcompeted native bull trout in many of them. (discovermagazine.com)
USGS research ecologist Clint Muhlfeld is part of National Park Service efforts to restore native bull trout in Glacier National Park. (discovermagazine.com)
Are brown trout replacing or displacing bull trout populations in a changing climate? (montanaclimate.org)