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Inland Avian Predation

Charlie Moores. Inland Avian Predation. Fish Field Unit Nathan Zorich FPOM Avian Update McNary emphasis September 13, 2012. Tim Avery. Mike Baird. Fish eating bird colonies. (Roby, Collis et al. 2011). USACE Avian Management. Estuary. In-land. BiOp requirements.

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Inland Avian Predation

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  1. Charlie Moores Inland Avian Predation Fish Field Unit Nathan Zorich FPOM Avian Update McNary emphasis September 13, 2012 Tim Avery Mike Baird

  2. Fish eating bird colonies (Roby, Collis et al. 2011)

  3. USACE Avian Management Estuary In-land

  4. BiOp requirements • Smolt survival 96% Spring & 93% Summer • Inland Avian Reasonable & Prudent Alternatives 47. Manage avian predators on Corps lands 48. Continue deterrents at dams 68. Monitor avian predators & smolt impacts • Needs Deterrent evaluation Long term monitoring Prioritize avian deterrent spending

  5. Long Term Monitoring: Counts

  6. Focused Monitoring : Fish Consumption Source: multiple: FFU studies

  7. Deterrent: Funding Hazing

  8. Monitoring: Standardization

  9. Monitoring: Data collection

  10. Monitoring: Analysis & Reporting

  11. Foraging Gulls 2012

  12. McNary Dam

  13. McNary 2012

  14. McNary 2012

  15. John Day Gulls 2009

  16. John Day Gulls 2010

  17. John Day Dam 2009* *Daily mean gull count n = 99 One dot = one gull

  18. John Day Dam 2010* *Daily mean gull count n = 17 One dot = one gull

  19. John Day Gulls 2011

  20. Gull CountsApril – July (foraging gulls / day) *April – 20 May 2010

  21. JFOF Approximate

  22. Concerns from Project Biologist • Region wants current hazing or more • Unsustainable under O&M budget forecast • Benefits hazing vs. political reality? • JD Consumption: 6k (0.02%) of 31 M smolt in 2011 38k (0.27%) of 40 M smolt in 2010 (Zorich et al. 2011) • Maintenance cost of extensive line array JD • $6 M to build, 125 synthetic lines 3,000 ft. long • Maintenance will increase as lines age and fail

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