Atlantic Salmon Restoration - oneidalakeassociation.org - Atlantic...Atlantic Salmon Restoration An...
Transcript of Atlantic Salmon Restoration - oneidalakeassociation.org - Atlantic...Atlantic Salmon Restoration An...
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Atlantic Salmon
RestorationAn Ecological and Bioenergetics Approach
Justin DiRado and Christopher Powers
Department of Environmental & Forest Biology
SUNY College of Environmental Science and Forestry
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Objective:
Restore Atlantic Salmon to
Fish Creek Region
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Presentation Outline
Field study (Justin)
• Objectives
• Methods
• Results
Laboratory study (Chris)
• Objectives
• Methods
• Desired outcomes
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Assess fry/parr growth and survival
Evaluate stream habitat
Identify regions of interest for restoration
Identify candidate strain
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Sebago Lake•Widely stocked
• Large adults
• Performance in Lake
Champlain
Lake Memphremagog
• High survival and growth rates
• High temperatures
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Map Of Study Sites
Fish Creek
Region
Drumlins
Region
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Mc S
S Mc
100m
≥200m
Stream 1 Stream 2
1 fish / m2
Stock fish early-summer
• Magogs clipped, Sebagos not
Sample habitat
• Substrate
• Water temperature
• Depth
• Velocity
• Water chemistry
Sample fish late-summer
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n=59 n=12 n=6 n=29n=
106n=51 n=15 n=40n=
1060
0.01
0.02
0.03
0.04
0.05
0.06
Point Rock Creek Eightmile Creek Rice Creek Little Creek Overall
Gs(
g-1
d-1
)
Magog
Sebago
***
***
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Score 0 - 1
Water Quality
FryHSI
Parr
Reproduction
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Field Results
Magog strain has higher growth rate potential
Survival was similar between strains
• High in Point Rock Creek, virtually zero in Mad River
Fish Creek tributaries offer relatively suitable
habitat
Expand streams / study sites for 2015
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Laboratory & Modeling Objectives
1)Evaluate Physiological Differences between two Strains
2) Model Climate Change Impacts on Habitat Suitability
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1) Evaluate Physiological Differences
Experimental Design:
10 Glass Tanks = 2 Strains of Fish x 5 Temperatures
S SSSS
MMM M M
24°C
75.2°F21°C
69.8°F
18°C
64.4°F
15°C
59.0°F
12°C
53.6°F
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1) Evaluate Physiological Differences
Growth, Food Consumption, Metabolism(Oxygen Consumption)
Does one strain “outperform” the other at elevated temperatures?
Calibrating the Oxygen Probes Salmon in Respirometry Chamber
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2) Model Climate Change Impacts
How will climate change effect Habitat Suitability and
Salmon?
Bioenergetics Model
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Growth = Consumption – (Metabolism + Waste Products)
Field Study:
Foraging Model, Site Habitat Variables
Laboratory Study:
Strain Specific Metabolism
Previous Studies:
Equations from earlier Researchers
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2) Model Climate Change Impacts Calculate Consumption using observed Flow Rates, Insect Drift
- Use observed field data to
calculate predicted Growth,
a metric for Habitat Quality
-Climate Change Predictions:
Alter: 1) Temperatures
2) Flow Rates
3) Insect Drift
-Stream/Regional Differences?
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Summary
Laboratory experiments = Strain Suitability
Bioenergetics/Foraging Model = Climate Change Impacts
Combined Outcomes =
Identify sites most suitable for continued stocking and
potential habitat restoration efforts.
Determine whether stocking additional strains should be
pursued.
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Any Salmon Encounters?
Statewide Regulation = 15 inch minimum size
Send us your Oneida Lake salmon and trout photos
Contact: [email protected] or [email protected]
Adult Atlantic Salmon Caught & Released by an angler on the W. Branch of Fish Creek