Today in most streems and lakes in Oregon there is no size limit or bag limit for Brook Trout. The reason is it's a non native fish and there is an efferort to reestablish the native rainbow population. (Native in the most loose scense of the word).
"Beginning in the early 1910s, state hatcheries produced millions of rainbow trout fry. They used mules, horses, hikers, trains, and cars to deliver the popular game fish to new and remote locations. Pacific Northwest rainbow trout were also introduced to waterways in many foreign countries. In exchange, non-natives such as the brook trout were introduced in Oregon. " Coppied from an Oregon history site.
"Danger to Local Native Trout
The introduced alien trout in each place are doing better than native species. Most of the thirteen species of cutthroat trout (Oncorhynchus clarki) native to the Pacific coast of North America have been pushed out by brown, brook and rainbow trout. And, in ironic twist of fate, the brown trout in the UK is struggling to maintain a foothold against brook trout introduced from the US."
"As awareness of trouble caused by introduced species increases, efforts are being made to undo damage done by intentional trout release for sport fishing worldwide." Coppied from an article on invasive trout species.
There have been a lot of species introduced into Oregon waters. I do believe that the fish biologist during that time period were trying there best to create a healthy diverse fishing experience for the angler. It just developed some problems and now they are trying to reverse the process. It seems that the brook trout is one aggressive eater and can out compete the rainbow for food. It also didn't help that there was no bag limit on trout untill 1901, and that limit was set at 125 fish per-day.
Taking brook trout out of the system is just a method of helping those rainbow re-establish themselves in their original natural area.
Some of the non native fish introduced include the brown trout, brook trout, atlantic salmon, shad and walleye. I just hope no one introduced the piranha.:shock: