To save its native trout, Yellowstone National Park poisons its rivers

As the cutthroat trout in Yellowstone National Park struggles to survive under the ecological pressure of an invasive species of brook trout, wildlife experts have turned to a chemical poisoning treatment as the solution.

After the cutthroat trout are stunned and removed from the river, rotenone, a chemical that clogs the gills of fish, will be distributed throughout parts of the park’s water system, particularly Soda Butte Creek. Once the brook trout are eliminated, the cutthroat trout will be reintroduced to the river.

Poisoning an entire river may seem like an extreme solution, but it is the approach that is most likely to get the job done, officials say. READ MORE.