Hydroelectric Operations Wild Rainbow Redband Trout Redband Spawning and Population Study Elements Hydrology Review Spawning Patch Inventory of the Study Area Physical Characterization of Spawning Patches ID: 790636
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Slide1
Federal Energy Regulatory CommissionHydroelectric Operations
Slide2Slide3Wild Rainbow (
Redband
) Trout
Slide4Redband Spawning and Population Study Elements
Hydrology Review
Spawning Patch Inventory of the Study Area
Physical Characterization of Spawning Patches
Hydrodynamic Characterization of Spawning Patches
Biological Spawning Characterization
Effective Spawning/Incubation Habitat Relationships
Redband
Trout Abundance Estimates (ten years)
Slide5Study Reach and Patch Inventory (2009)
Slide6Substrate Characterization
Slide7Survey Patch Area and Elevation
Slide8Survey Water Elevations
Slide9Redband Trout Spawning Period 2010
Spawning Survey (2010)
Slide10Spawning Areas Mapped
Slide11Observed Redband Trout Depth and Velocity Frequency
Slide12Artificial
Redds
for Intra-gravel Survival
Slide13Trout Fry Survival
Slide14Cumulative Spawning Plot Area
Slide15Results 2010
58 Gravel Patches
Deeper Spawning: Ave. 3.5’, Max. Over 5 Feet
148
Redds
Counted in 2010 (130 in 2003)
Appears There is Good Intra-Gravel Survival
Habitat Over a Range of Flows
Effective Spawning and Incubation Habitat Tables
Slide16Mark-Recapture Population Estimate
Slide17Results
Tagged Over 800
Redbands
in 2010
Estimated Over 1,300 Ten Inch Fish in 2010
Tagged Over 650
Redbands
in 2011
Estimated Over 1,400 Ten Inch Fish in 2011
Tagged Over 455
Redbands
in 2012
Estimate Over 1,050 Ten Inch Fish in 2012
Slide18Effective Spawning and Incubation Habitat
Length and Age Frequency
Slide19Tim Vore
509.495.8612
tim.vore@avistacorp.com
Credits: West Fork Environmental,
Cardno
Entrix
, WDFW