I volunteered three years of my time to working on fish surveys in three different lakes.

The biggest salmon smolt eaters were freshwater sculpins, a NATIVE FISH! Bass ate lots of Sculpins, and Crawdads mostly. so back eddy can back paddle. As bass have actually been shown to help salmon HA HA HA. No joke.

As for your for your so called native trout in lakes. News flash! Trout need running water to spawn. The only native fish in lakes without tributaries were minnows!

As I am someone who likes to fish for Bass how would you like me to start tossing none native trout in the bushes? being a purist can work to my anvantage to :p