Reintroduction of Lower Columbia River Chum Salmon into Duncan Creek

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Reintroduction of Lower Columbia River Chum
Salmon into Duncan Creek

• BPA Project number 200105300

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Dam
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Dam Prior To Renovation
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Duncan Dam Post Renovation
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Duncan Creek Prior To Renovation
Seeps and Springs
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Habitat Renovation Removing The Over-Burden
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Channel Construction

• Added 60 Cm of Select Gravel
• Banks Protected By Sedi-mat

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Total Area Renovated

• 780 Square Meters Of Spawning Area
• 1,370 Meters of Stream
• 300 Females

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Re-Introduction Strategies

• Introduction Of Adults From Local Populations
• Introduction Of Cultured Chum Fry

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Project Objectives

• Evaluate Re-introduction Strategies
• Determine If Renovated Spawning Habitats Can
  Create Sustainable Natural Populations
• Examine Homing Fidelity

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Re-introduction Steps

• Capture Local Brood Stock
• Transfer To Washougal Hatchery Duncan Creek

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Re-introduction Steps

• At Washougal
• Factorial Crosses
• Thermally Mark
• Rear Fry to 1.5 g

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Re-introduction Steps

• Transfer Reared Fish To Duncan
• Acclimatize In Net Pens
• Release At Night On Out-going Tide

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Re-introduction Steps

• At Duncan Creek Fish were tagged Released Into
  Renovated Spawning Areas

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Monitoring Biological Parameters
Estimating Egg-to-Fry Survival
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Factors Affecting Fecundity
Body Size (Length Wt) Age Brood Year Stock
Origin K (Condition) Egg Size Reproductive
Effort
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Actual Egg Deposition (AED) Equals
Potential Egg Deposition (PED) Egg
Retention At Death
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Cross Weir Proto-type Fry Trap
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Egg-to-Fry Survival
Total Fry Production
AED
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Measuring Environmental Parameters
Surface Waters
Wetted Channel Hyporheic Zone
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Surface Water Attributes
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Hyporheic Attributes
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Dissolved Oxygen Levels
Water Level
Streambed
Incubating Eggs
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Vertical Height Gradient
h1
hs
VHG (hs h1)/L Up welling - Down welling
L
Water Level
Streambed
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McNeil Gravel Sampler
Plunger
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Project Standards

• Biological Standards Natural Spawning
• Egg-to-Fry Survival gt 40
• KD at emergence gt 1.8 lt 2

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Project Standards

• Biological Standards Artificial Production
• Green Egg-to-Fry Survival gt 90
• Rearing Survival gt 95

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Project Standards

• Environmental Standards
• D.O. Near Saturation In Surface Hyporheic Zones
• Gravel Composition Fredle Index gt 4.0 lt 10
  Sand
• Water Temp gt 1oC For First Two Weeks
  Post-Fertilization

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Evaluating HomingStrontium Thermal marks
Sr mark
Thermal Mark
Backscatter SEM
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Settleable Solids
Imhoff Cones 1-Liter Samples Rest 45 min Stir
sides with rod Wait 15 min Read Volume
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Channel Construction

• Bank planting re-vegetation
• Pacific willow
• Sitka willow
• Columbia willow
• Red osier dogwood