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The City of Portland, Oregon

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Bringing Lamprey Back to Tryon Creek


6 inch Pacific lamprey in netWe’ve blogged about lamprey in Johnson Creek and Crystal Springs, and now it’s time for some exciting news about these creatures in Tryon Creek in SW Portland. 

Here’s a Pacific lamprey found in the creek by a U.S. Fish and Wildlife Service (USFWS) crew.  USFWS was surveying for lamprey as part of efforts to bring these native fish back to Tryon Creek.  This one is about 6" long.

Pacific lamprey spawn in many tributaries of the lower Willamette River, but are in decline across the northwest.  Due to the many efforts to improve conditions in Tryon Creek, including BES projects to improve water quality and habitat, biologists feel that there is a good opportunity there to establish a natural cycle of lamprey migration and spawning. 

The USFWS and Oregon Department of Fish and Wildlife launched a pilot project in 2013 to seed Tryon Creek with larval Pacific lamprey from local sources, and annual surveys are conducted looking for larvae and adult lamprey. Information on implementation and results will be shared with partners like the Friends of Tryon Creek, Tryon Creek Watershed Council and the City of Portland.  Learn more about Pacific lamprey and these efforts on USFWS’s website

For more news about findings from monitoring at the Tryon Creek Confluence project area, check out this new fact sheet.


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