As to Browns:
When were brown trout introduced to the US?
The first introduction of the brown trout into the United States was by the US Fish Commission in 1883 in Michigan State . In Michigan , brown trout eggs were raised at the Northville hatchery. The fish were then released into the Pere Marquette River in the Northern area of the state.
Introduced by......."US Fish Commission"
Aren't cutthroats and brook a couple of the only trout specie not "brought in" by agencies or individuals who decided other specie "needed to be introduced"???