That's sad news if the cutthroat population has taken that much of a hit from the Mackinaws. I heard it was bad, but I haven't been in the park for almost a decade. Last time I was on that section of the Yellowstone was an early July (before it was open to fish) and I remember tossing golden stones into the river somewhere near buffalo ford and every one was eaten by one of the many visible cutties. The Yellowstone cutthroat are a special fish, and I hope the netting and retention of the lake trout will eventually help but it doesn't look good when you her things like this.
"Perhaps fishing is, for me, only an excuse to be near rivers." - Roderick Haig-Brown