Aquatic Invertebrates - invasive

Ringed Crayfish (Orconectes neglectus) on Jul 10, 2023

Submitter does not have a specimen

Description of specimen

A single Ringed Crayfish. about 3" in length, black and orange/red tipped pinchers.

Commentary

Thank you for your report! Ringed crayfish have been known in SW Oregon for many years and they unfortunately continue to expand their range. Your report helps us understand their distribution and spread. You can learn more at https://www.dfw.state.or.us/conservationstrategy/invasive_species/crayfish.asp and https://seagrant.oregonstate.edu/sites/seagrant.oregonstate.edu/files/invasive-species/toolkit/crayfish.pdf.

Lindsey Wise
Aug. 8, 2023, 3:01 a.m.

Remedy

Never move live crayfish from one area to another.

Resources

First discovered in Oregon during the 1960s in the Rogue River. Possible introduction paths include anglers using crayfish as live bait, classroom experiments and releases by pet owners. Learn more from Oregon Dept of Fish and Wildlife.

Location

Left bank of the South Umpqua River- just above the riffle at the tail end of the Tiller Ranger District Compound.
Gravel/cobble substrate.
42.932077, -122.945572

Expert Reviewer

Mrs. Lindsey Wise
Oregon Biodiversity Information Center, inr.oregonstate.edu/orbic
Oregon iMapInvasives
Institute for Natural Resources
Portland State University

© 2024 Portland State University | Contact us for questions regarding site content