The invasive Northern crayfish was reported for the first time in Oregon last month, in an Ashland waterway that eventually flows into the Rogue River.
Native to the midwest, they can outcompete local crayfish species and prey on endangered salmon and steelhead eggs.
Oregon Department of Fish and Wildlife鈥檚 Rick Boatner says his team conducted a survey last week to see the extent of the damage.
"You know, I was disappointed," Boatner says. "I was hoping they were still just in the Ashland area, but they鈥檙e outside of the Ashland area 鈥� in Bear Creek, which is part of that system. So they鈥檙e moving on down to the Rogue.鈥�
Boatner says there鈥檚 not much that can be done now to contain the crayfish, but encourages folks to report sightings of Northern crayfish to track their reach.
鈥淪o we may be at a point where we can鈥檛 do much," he says. "Since they鈥檙e everywhere.鈥�
Boatner says control methods such as poison or trapping would be either ineffective or harmful to native species at this point.
It鈥檚 still unknown how the crayfish were introduced to the region. Boatner believes the remains of a school science project could have been dumped into a nearby waterway; unaware the crayfish are invasive.
Importing non-native crayfish to Oregon requires a permit, and violators can face penalties or civil fines.
