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Title Tracking a High Risk Fluvial Bull Trout Population with Half-duplex Passive Interrogation Vince Tranquilli Oregon Department of Fish and Wildlife.

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Presentation on theme: "Title Tracking a High Risk Fluvial Bull Trout Population with Half-duplex Passive Interrogation Vince Tranquilli Oregon Department of Fish and Wildlife."— Presentation transcript:

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

2 Upper Willamette River Basin South Fork McKenzie River Map

3 Project - Funded by USACE - modify dam intake for water temperature - draw-down the reservoir for years - high risk bull trout population - no fish passage Cougar Dam Water Temperature Control Project

4 Info. data Need information - migration timing - entrainment - abundance

5 Info. data Need information - migration timing - entrainment - abundance Data Sets - radio telemetry - PIT interrogation Methods apply high risk population

6 Radio Telemetry

7 Reservoir Dam

8 HDX PIT tags Reduce Risk?And, increase sample size

9 HDX PIT tags TI-RFid 23 mm half-duplex pulsed RF field KHz transmits KHz 10 reads per second

10 PIT tagging Tag - shedding - orientation Fish > 100 mm FL

11 DO Remote PIT tag Interrogation Site

12 DO Detection Efficiency: 90% at 200 cfs, N = 30

13 DO Detection Efficiency: 73% at 1,000 cfs, N = 30

14 DO Detection Efficiency: 73% at 1,000 cfs, N = 30 Operating at 12 VDC – Increase Performance

15 DO low impact on fish behavior

16 3 int sites Fluvial Bull Trout Up and Downstream Movements

17 Detection Efficiency Min. Detection Efficiencies U = Up D = Down U: 62%, N = 26 D: 63%, N = 27 U: 93%, N = 15 D: 93%, N = 14 U: 81%, N = 21 D: 80%, N = 20

18 Spawn Spawning Escapement: Electronic fish counter - No. of fish - Direction of travel Time lapse Video - Species Double counting fish?

19 Identify Add Remote PIT tag Interrogation For example: UpAug DownSep UpSep DownSep. 18

20 Identify Add Remote PIT tag Interrogation - Identify individual fish movements - Improve accuracy of fish count For example: UpAug DownSep UpSep DownSep. 18

21 Juvenile but July of 2001, 115 mm FL Oct Jan. 2004

22 Adult but Reservoir Dam

23 Caught below dam Spawning tributary

24 Caught below dam

25 All PIT 2003

26 RC

27 Spiral Antenna Highly adaptable system = site-specific antenna designs

28 Reading frame

29 Detection area extends beyond the antenna frame

30 SC Detection area extends beyond the antenna frame

31 multiple antennas Multiple antenna sites = synchronize or multiplex

32 Wired synch Multiple Antenna Sites: - Wireless synch. - Wired synch.

33 Multiplex Multiple Antenna Sites: - Wireless synch. - Wired synch. - Multiplex

34 Power Power: - access to AC power

35 Power Power: - access to AC power - battery swapping

36 Power Power: - access to power line - battery swapping - on-site generation

37 Handheld Hand-held PIT tag Reader - $300 - Compatible with FDX / HDX

38 Handheld Hand-held PIT tag Reader - $300 - Compatible with FDX / HDX

39 Handheld Pocket PIT tag Reader - Compatible with FDX / HDX

40 Acknowledgements: Alex Haro Gayle Zydlewski


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