Pacific Brook Lamprey – State Wildlife Action Plan

Overview

Species Common Name Pacific Brook Lamprey
Species Scientific Name Occidentis pacifica
State Listing Status Sensitive

Ecoregions

Willamette Valley

The Willamette Valley ecoregion is bounded on the west by the Coast Range and on the east by the Cascade Range. This long mostly level alluvial plain has some scattered areas of low basalt, and contrasts with productive farmland and large urban areas. It has the fastest-growing human population in the state resulting in challenges due to land-use changes.

Special needs

This freshwater species spawns in gravel in shallow water and the larvae rear for a few years before transforming into mature adults that spawn.

Limiting factors

Habitat access (artificial obstructions), water quantity (reduced flows, flow management), water quality, physical habitat (stream and floodplain degradation), and predation by other species.

Data gaps

Distribution; passage and screening requirements; biology; amount of take; nature and extent of complex, large-scale threats.

Conservation actions

Education and outreach; improve passage and screening; protect and restore habitat; water conservation.
See ODFW’s Conservation Plan for Lampreys for strategies.

Key reference or plan

ODFW’s Conservation Plan for Lampreys. Read here