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Lamprey Unknowns - ODFW / Clemens
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Lamprey Unknowns - ODFW / Clemens

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  • 1. Pacific lamprey biology:critical uncertainties & context Benjamin J. Clemens Oregon Department of Fish & Wildlife
  • 2. Willamette Falls 1913 Source: Clackamas County Historical Society
  • 3. Die-offTemp. > 20 oC
  • 4. Tribal Harvest at Willamette FallsK. Kostow, 2002 ODFW white paper; D. Ward 2001 ODFW report
  • 5. Willamette Last stronghold?Example for other basins?
  • 6. = “Immature” Males 674 mm 525 mm1 Collection Date Clemens 2011 Ph.D. dissertation
  • 7. STREAM MATURING TYPEOCEAN MATURING TYPE Clemens 2011 Ph.D. dissertation
  • 8. Clemens, Wyss, McCoun, Schwabe, Courter, Duery, Vaughn & Schreck 2012 Report to CRITFC
  • 9. Lamprey Critical Uncertainties• Moser et al. 2007 Rev. Fish Biol. Fish.• Mesa et al. 2009• Luzier et al. 2009• Clemens et al. 2010 Fisheries• Lamprey Tech. Workgroup 2005-2011• U.S. F& WS 2011• CRITFC 2011*We are certain that we are uncertain!
  • 10. Photo credit: Jeremy Monroe , Freshwater Illustrated
  • 11. Lamprey Critical Uncertainties• Biology (basic; stress, disease; pop’n dynamics)• Population structure (genetics)• Habitat (use vs. avail; toxics; thresholds; climate change)• Ecology (abundance, dist., prey, predators; keystone sp?)• Monitoring (survey, collection, marking)• Conservation (limiting factors; aquaculture)• Management (passage, transloc., dredging, dewatering) Tangible products needed….
  • 12. Lamprey Critical Uncertainties• Climate change• Human pop’n & economic growth• Ocean conditions• Pop’n structure• Monitoring• Habitat rehab• Predictive modeling• Adaptive management We are not there…yet.
  • 13. Context• Science – Explore, Describe, Test, Monitor, Model, Predi ct – Synthesize, Integrate, Refine • Status and trend monitoring (patterns) • What does it mean? • Identify biological mechanisms • Connect mechanisms with patterns Ultimate mechanisms?
  • 14. Context: Scale

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