Pacific Lamprey

Pacific Lamprey
Photo Credit: Evan Leonetti


102709Pll-150

102709Pll-162

Overview

  • Species Common Name Pacific Lamprey
  • Species Scientific Name Entosphenus tridentatus
  • Federal Listing Status Species Of Concern
  • State Listing Status Sensitive

Ecoregions

    Special needs

    May aggregate in high densities. Requires fine gravel beds for spawning. Larvae burrow in fine sediment. Timing of development closely linked to water temperature. Adequate food availability during adult marine feeding stage of life history. Migration to ocean may depend on sustained inflow from flooding or snowmelt.

    Limiting factors

    Reduced water quality. Passage barriers. Altered flow patterns. Dredging. Rapid water draw-downs. Marine survival.

    Conservation actions

    Improve passage. Alter timing of water draw-down. Use species-specific habitat requirements to guide management actions. See results of Lamprey Workgroup 2005 for strategies. Fill data gaps on marine life history, including migration needs. Use results to inform water management at storage facilities.