Pacific lamprey biology:critical uncertainties & context                       Benjamin J. Clemens               Oregon De...
Willamette Falls    1913                   Source: Clackamas County Historical Society
Die-offTemp. > 20 oC
Tribal Harvest at                                             Willamette FallsK. Kostow, 2002 ODFW white paper; D. Ward 20...
Willamette   Last stronghold?Example for other basins?
= “Immature” Males    674 mm             525 mm1 Collection Date                      Clemens 2011 Ph.D. dissertation
STREAM MATURING TYPEOCEAN MATURING TYPE                Clemens 2011 Ph.D. dissertation
Clemens, Wyss, McCoun, Schwabe, Courter, Duery, Vaughn & Schreck 2012 Report to CRITFC
Lamprey Critical Uncertainties•   Moser et al. 2007 Rev. Fish Biol. Fish.•   Mesa et al. 2009•   Luzier et al. 2009•   Cle...
Photo credit: Jeremy Monroe , Freshwater Illustrated
Lamprey Critical Uncertainties•   Biology (basic; stress, disease; pop’n dynamics)•   Population structure (genetics)•   H...
Lamprey Critical Uncertainties•   Climate change•   Human pop’n & economic growth•   Ocean conditions•   Pop’n structure• ...
Context• Science  – Explore, Describe, Test, Monitor, Model, Predi    ct  – Synthesize, Integrate, Refine     • Status and...
Context: Scale
Lamprey Unknowns - ODFW / Clemens
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Lamprey Unknowns - ODFW / Clemens

  1. 1. Pacific lamprey biology:critical uncertainties & context Benjamin J. Clemens Oregon Department of Fish & Wildlife
  2. 2. Willamette Falls 1913 Source: Clackamas County Historical Society
  3. 3. Die-offTemp. > 20 oC
  4. 4. Tribal Harvest at Willamette FallsK. Kostow, 2002 ODFW white paper; D. Ward 2001 ODFW report
  5. 5. Willamette Last stronghold?Example for other basins?
  6. 6. = “Immature” Males 674 mm 525 mm1 Collection Date Clemens 2011 Ph.D. dissertation
  7. 7. STREAM MATURING TYPEOCEAN MATURING TYPE Clemens 2011 Ph.D. dissertation
  8. 8. Clemens, Wyss, McCoun, Schwabe, Courter, Duery, Vaughn & Schreck 2012 Report to CRITFC
  9. 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. 10. Photo credit: Jeremy Monroe , Freshwater Illustrated
  11. 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. 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. 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. 14. Context: Scale

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