BUILDING STRONG ® PORTLAND DISTRICT 1 Inland Avian Predation Fish Field Unit Nathan Zorich FPOM Avian Update McNary emphasis September 13, 2012 Charlie Moores Tim AveryMike Baird
BUILDING STRONG ® PORTLAND DISTRICT 2 Fish eating bird colonies (Roby, Collis et al. 2011)
BUILDING STRONG ® PORTLAND DISTRICT 3 USACE Avian Management Estuary NWP Push – Pull Reduce habitat in estuary Attract to artificial nesting island Monitoring In-land NWW Dam based Passive & Active Deterrents Monitoring Standardized Counting & Reporting Other Corps’ land (IAPMP) Reduce habitat Monitoring
BUILDING STRONG ® PORTLAND DISTRICT 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
BUILDING STRONG ® PORTLAND DISTRICT 5 Long Term Monitoring: Counts
BUILDING STRONG ® PORTLAND DISTRICT 6 Focused Monitoring : Fish Consumption Source: multiple: FFU studies
BUILDING STRONG ® PORTLAND DISTRICT 7 Deterrent: Funding Hazing
BUILDING STRONG ® PORTLAND DISTRICT 8 Monitoring: Standardization
BUILDING STRONG ® PORTLAND DISTRICT 9 Monitoring: Data collection
BUILDING STRONG ® PORTLAND DISTRICT 10 Monitoring: Analysis & Reporting
BUILDING STRONG ® PORTLAND DISTRICT 11
BUILDING STRONG ® PORTLAND DISTRICT 12
BUILDING STRONG ® PORTLAND DISTRICT 13 Foraging Gulls 2012
BUILDING STRONG ® PORTLAND DISTRICT 14 McNary Dam
BUILDING STRONG ® PORTLAND DISTRICT 15 McNary 2012
BUILDING STRONG ® PORTLAND DISTRICT 16 McNary 2012
BUILDING STRONG ® PORTLAND DISTRICT 17
BUILDING STRONG ® PORTLAND DISTRICT 18 John Day Gulls 2009
BUILDING STRONG ® PORTLAND DISTRICT 19 John Day Gulls 2010
BUILDING STRONG ® PORTLAND DISTRICT 20 John Day Dam 2009* *Daily mean gull count n = 99 One dot = one gull
BUILDING STRONG ® PORTLAND DISTRICT 21 John Day Dam 2010* *Daily mean gull count n = 17 One dot = one gull
BUILDING STRONG ® PORTLAND DISTRICT 22 John Day Gulls 2011
BUILDING STRONG ® PORTLAND DISTRICT 23 Gull Counts April – July (foraging gulls / day) * April – 20 May 2010
BUILDING STRONG ® PORTLAND DISTRICT 24 JFOF Approximate
BUILDING STRONG ® PORTLAND DISTRICT 25 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 k (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