Capture Measure Tag Brook Trout in Washington's Tyee Springs

A Service fish biologist measures and documents a brook trout captured in Washington's Tyee Springs, which is the main water source for Carson National Fish Hatchery. Scientists with the Pacific Region's Columbia River Fish and Wildlife Conservation Office, Abernathy Fish Technology Center, and other partners are using YY brook trout males (which have two YY chromosomes) as a biological control strategy to eradicate the invasive brook trout from Tyee Springs since they pose a threat to the hatchery's spring Chinook.