Lamprey Unknowns - ODFW / Clemens

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Willamette River Initiative

Pacific lamprey biology:
critical uncertainties & context

Benjamin J. Clemens
Oregon Department of Fish & Wildlife

Willamette Falls
1913

Source: Clackamas County Historical Society

Tribal Harvest at
Willamette Falls

K. Kostow, 2002 ODFW white paper; D. Ward 2001 ODFW report

Willamette

Last stronghold?

Example for other basins?

= “Immature” Males
674 mm

525 mm

1 Collection Date
Clemens 2011 Ph.D. dissertation

STREAM MATURING TYPE

OCEAN 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
• Clemens et al. 2010 Fisheries
• Lamprey Tech. Workgroup 2005-2011
• U.S. F& WS 2011
• CRITFC 2011

*We are certain that we are uncertain!

Photo credit: Jeremy Monroe , Freshwater Illustrated

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….

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.

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?

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Lamprey Unknowns - ODFW / Clemens

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-off Temp. > 20 oC

4. Tribal Harvest at Willamette Falls K. Kostow, 2002 ODFW white paper; D. Ward 2001 ODFW report

5. Willamette Last stronghold? Example for other basins?

6. = “Immature” Males 674 mm 525 mm 1 Collection Date Clemens 2011 Ph.D. dissertation

7. STREAM MATURING TYPE OCEAN 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.

13. 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.

14. 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?

15. Context: Scale

Lamprey Unknowns - ODFW / Clemens

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