Yellowstone lake trout

by (AP file photo/National Park Service)
| May 7, 2014 4:35 PM

Brian Ertel, a fisheries biologist at Yellowstone National Park, holds a netted lake trout caught from Yellowstone Lake in 2013. Scientists say the voracious fish that entered Yellowstone Lake and decimated its native trout population appears to be in decline following efforts to kill off the invading fish.