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Tacoma Narrows

Tacoma Narrows. Acoustic Tracking Line 2007. Acoustic Sensor Placement. Acoustic Sensor Placement. Study Objectives. Migration Routes Migration Timing Potential Interactions/Competition Relative Mortality. Deschutes River Chinook WDFW . 1. 1. 14. 32.

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Tacoma Narrows

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  1. Tacoma Narrows Acoustic Tracking Line 2007

  2. Acoustic Sensor Placement

  3. Acoustic Sensor Placement

  4. Study Objectives • Migration Routes • Migration Timing • Potential Interactions/Competition • Relative Mortality

  5. Deschutes River ChinookWDFW 1 1 14 32 40

  6. Deschutes River SteelheadWDFW 1 1 3 1 14 15

  7. Netpen Hatchery CohoSquaxin Island Tribe 46% 3% 92% 1% 22% 13%

  8. Netpen Hatchery CohoMigratory Corridors 67% 14% 86% 33%

  9. Days Detected After Release

  10. Netpen Hatchery CohoHolding Areas

  11. Cooperative Studies Nisqually River Steelhead South Puget Sound Cutthroat Trout Lingcod

  12. Narrows Other Detections Six Gill Shark Seven Gill Shark Squid Steelhead Chinook Lingcod

  13. Coho Hold 2006

  14. Two Phases • 1. Modify the new Tacoma Narrows Bridge to accept acoustic receivers for future studies • 2. Retrieve 2007 Narrows receivers

  15. Phase 1

  16. Phase 2

  17. Benefits From Bridge Location • Mounts are designed to be long lasting • Shallow enough to be maintained by recreation divers (shallow)-Tribal, South Sound Dive Club, Tacoma Dive Schools • Educational component on WSDOT Bridge mitigation website

  18. 2008Proposed South Sound Wild Coho - 4 South Puget Sound Streams- Mill and Goldsborough- Hammersley Inlet; Sherwood-Case Inlet; Deschutes- Budd Inlet Netpen Coho- Peale Passage Wild Steelhead- Nisqually River

  19. Release Sites 2006

  20. Future Studies South Sound All wild and hatchery stocks tagged to identify- • Spatial bottlenecks for survival • Holding areas • Migratory corridors

  21. Data Uses Prioritize restoration and preservation opportunities by affected population Hatchery release practices-timing and #’s Input to ecosystem based models Input to capacity models Input to life history models-FRAM assumes linear mortality

  22. Letters of Support • Nisqually Tribe • Squaxin Island Tribe • Puyallup Tribe • WDFW • WDOE • UW • Evergreen State • NOAA • NWIFC • ACOE

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