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Oregon Field Guide

Lamprey Decline

Populations of Eel-like lamprey have suddenly plummeted since the year 2000 in the Columbia Basin, surprising scientists. Lamprey numbers had increased for many years after the dams went in on the Columbia. Experts have built new ladders just for the lamprey to use to cross Bonneville Dam after learning they have great trouble with the conventional salmon ladders. Tribes, meanwhile, are restricting their harvest of this important cultural food.

First Broadcast: 2011
Producer: Vince Patton
Videographer/Editor: Michael Bendixen
Videographer: Todd Sonflieth
Video courtesy of: Freshwaters Illustrated, USFWS Mid-Columbia FRO

More Information
Lamprey Facts
More on Lamprey
BPA Lamprey Decline


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Amphibian Egg Masses; Lamprey Decline; Mazama Archive

Oregon Field Guide: Episode #2213
Original Broadcast: March 31, 2011