1. A 2.4- by 6.1-m Flexible Antenna for Detecting Full-Duplex PIT-Tagged Fish Matthew S. Morris, Robert J. Magie, Jeremy P. Bender, Richard D. Ledgerwood, and Bruce F. Jonasson Northwest Fisheries Science Center National Marine Fisheries Service

2. Outline Background Large antenna development Transition to flexible antennas Current uses Potential uses

3. 2012 PD7 Configuration FS1001M Transceiver 2.4m 1.2m 3.1m 6.1m 1.2m 6.1 x 6.1m Wing (0.9m Mesh) Background Flow Piling PIT ‑ tag antennas Adult salmonids Wing

4. Development began in Nov 2012 IS1001 reader Maximize antenna size One antenna on pile terminus Result: 2.4 x 6.1 m rigid antenna Large Antenna Development 2.4 m 6.1 m

5. Large Antenna Development 2.4 m 6.1 m 2.4m 6.1m Flow 6.1 x 6.1m Wing (0.9m Mesh) 2013

6. Transition to Flexible Antennas 1.9-cm-diameter flexible hose Shape maintained by rope frames Easy to transport and deploy Lower construction cost than same size PVC antenna Resistant to cracking

7. Pile Dike Flow 6.1m 2.4m 6.1m 2.4m 6.1m Flexible antennas used exclusively in 2014 9 antennas spread over 100 m Varying orientations and deployment strategies

8. Stationary Deployment Strategies Parallel to Pile DikePerpendicular to Pile Dike Anchor

9. 2014 Pile Dike Results Species/RunPD7 (N)BON (N)% Spring Chinook434,6450.9 Summer Chinook302,1131.4 Fall Chinook596,3110.9 Unk Chinook61,2800.5 Coho123,3160.4 Steelhead367,6620.5 Sockeye136502.0 Total19925,9770.8 Adults (no jacks) Adults and Jacks PD7 Efficiency of BON Detections

10. Travel Time from PD7 to BON 2014 Pile Dike Results

11. Towed Deployed a one-antenna and a two- antenna design in 2014 Modular design Targets outmigrating juveniles Detected 9 fish during short one- antenna tests

12. Towed Plans for 2015 90 m 9 m 2.6 m Estuary Pair-Trawl

13. Towed Plans for 2015 90 m 9 m 2.6 m Spreader Bar Towline 30 m Weight Float Rope Frame Antennas 5 m 6.1 m 19 m Flow Electronics Cable Electronics Capsules 2.4 m Estuary Pair-Trawl

14. Flexible Antenna Advantages Easy to transport and deploy Light weight Low buoyancy Large detection area Adaptable Inexpensive relative to PVC

15. Potential Uses Full coverage of small streams (pass-over and/or pass-through) Passive detection on fixed sites Towed in lakes, forebays, shallow-water habitats Anchored array Terrestrial More

16. Acknowledgements Gabriel Brooks -NOAA Joe Aga -OAI Lindsey Webb –OAI Paul Bentley- NOAA Barbara Shields -BPA Brad Eppert -USACE Ben Sandford -NOAA Dean Park –Biomark Steve Anglea -Biomark