Editing Rainbow trout (section)

=== Removal methods ===
Some fisheries are focused on removing rainbow trout in order to reestablish native trout populations. This can be done by poisoning rivers with chemicals such as [[antimycin]] or [[rotenone]] which have been declared safe in the U.S. by the [[United States Environmental Protection Agency|Environmental Protection Agency]]. Once the chemicals have dissipated, native trout are released into the river. Another method is to use [[electrofishing]] which enables the fish to be caught alive and harvested or re-located. This technique has been used in the Great Smokey Mountains National Park to rid it of rainbow trout that were introduced in the 1930s and have thrived ever since. They are hoping to re-establish native brook trout in at least some of the {{convert|2100|mi|km|order=flip|abbr=on}} river system.<ref>{{Cite web|url=http://www.smithsonianmag.com/science-nature/native-trout-are-returning-to-americas-rivers-160317057/?no-ist|title=Native Trout Are Returning to America's Rivers|website=Smithsonian|access-date=2016-05-03}}</ref> Neither method of control is 100% effective and are best regarded as methods to change the relative population sizes of fish species.