The lake trout killing is the centerpiece of a long-term fight to help Yellowstone’s native cutthroat trout recover from a predation-driven crash of their own.
The mackinaw catch declined 37 percent year over year, Koel said, even though there was a concurrent increase in the level of netting pressure.
Almost all the difference comes from smaller fish, which aren’t turning up in small-mesh gill nets in as high of numbers. A year ago, nearly 350,000 of the 400,000 caught and killed were classified as small fish, those perhaps a foot or so long, Koel said.