Tracking a High Risk Fluvial Bull Trout

1
Title
Tracking a High Risk Fluvial Bull Trout
Population with Half-duplex Passive
Interrogation
Vince Tranquilli Oregon Department of Fish and
Wildlife Research and Monitoring Program
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Map
Upper Willamette River Basin
South Fork McKenzie River
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Project
Cougar Dam Water Temperature Control Project

• Funded by USACE
• modify dam intake for
• water temperature
• draw-down the reservoir
• for 3 - 4 years
• high risk bull trout population
• no fish passage

4
Info. data
Need information - migration timing -
entrainment - abundance
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Info. data
Need information - migration timing -
entrainment - abundance
Data Sets - radio telemetry - PIT
interrogation Methods apply high risk
population
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Radio Telemetry
Radio Telemetry
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Radio Telemetry
Reservoir
Dam
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HDX PIT tags
Reduce Risk? And, increase sample size
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HDX PIT tags
TI-RFid
23 mm half-duplex pulsed RF field 134.2
KHz transmits 123.2 KHz 10 reads per second
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PIT tagging
Tag - shedding - orientation
Fish gt 100 mm FL
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DO
Remote PIT tag Interrogation Site
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DO
Detection Efficiency 90 at 200 cfs, N 30
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DO
Detection Efficiency 73 at 1,000 cfs, N 30
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DO
Detection Efficiency 73 at 1,000 cfs, N 30
Operating at 12 VDC Increase Performance
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DO
low impact on fish behavior
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3 int sites
Fluvial Bull Trout Up and Downstream Movements
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Detection Efficiency
Min. Detection Efficiencies U Up D Down
U 62, N 26 D 63, N 27
U 81, N 21 D 80, N 20
U 93, N 15 D 93, N 14
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Spawn
Spawning Escapement Electronic fish counter -
No. of fish - Direction of travel Time lapse
Video - Species Double counting fish?
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Identify
Add Remote PIT tag Interrogation For
example 113270247 Up Aug. 30 113270247
Down Sep. 9 113270247 Up Sep. 12 113270247
Down Sep. 18
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Identify
Add Remote PIT tag Interrogation - Identify
individual fish movements - Improve accuracy of
fish count For example 113270247 Up Aug.
30 113270247 Down Sep. 9 113270247 Up Sep.
12 113270247 Down Sep. 18
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Juvenile but
July of 2001, 115 mm FL
Oct. 2003
Jan. 2004
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Adult but
Reservoir
Dam
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Caught below dam
Spawning tributary
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Caught below dam
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All PIT 2003
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RC
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Spiral Antenna
Highly adaptable system site-specific antenna
designs
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Reading frame
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Reading frame
Detection area extends beyond the antenna frame
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SC
Detection area extends beyond the antenna frame
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multiple antennas
Multiple antenna sites synchronize or multiplex
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Wired synch

• Multiple Antenna Sites
• - Wireless synch.
• - Wired synch.

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Multiplex

• Multiple Antenna Sites
• - Wireless synch.
• - Wired synch.
• - Multiplex

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Power

• Power
• - access to AC power

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Power

• Power
• - access to AC power
• - battery swapping

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Power

• Power
• - access to power line
• - battery swapping
• on-site generation

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Handheld
Hand-held PIT tag Reader
- 300 - Compatible with FDX / HDX
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Handheld
Hand-held PIT tag Reader
- 300 - Compatible with FDX / HDX
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Handheld
Pocket PIT tag Reader
- Compatible with FDX / HDX
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AcknowledgementsAlex HaroGayle Zydlewski