IMPACTS OF DAM AND RESERVOIR PASSAGE ON OUTMIGRATING JUVENILE HATCHERY CHINOOK SALMON: RESULTS FROM A PAIRED RELEASE STUDY IN THE UPPER WILLAMETTE RIVER.

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Presentation transcript:

IMPACTS OF DAM AND RESERVOIR PASSAGE ON OUTMIGRATING JUVENILE HATCHERY CHINOOK SALMON: RESULTS FROM A PAIRED RELEASE STUDY IN THE UPPER WILLAMETTE RIVER BASIN Oregon Department of Fish and Wildlife Corvallis Research Laboratory Jason R. Brandt Thomas A. Friesen Marc A. Johnson Paul M. Olmsted Study Code JPL MF and JPL DET

Objectives IntroductionMethodsResultsSummaryQuestions  Estimate the effect that passage through dams and reservoirs in the Middle Fork Willamette and North Santiam rivers has on outmigration success (relative detection rate) of juvenile hatchery Chinook salmon  Estimate the effect that passage through dams and reservoirs has on survivorship to adulthood for juvenile hatchery Chinook salmon  Useful ancillary data: movement and growth rates of juvenile hatchery Chinook salmon released above and below dams

Study Area and Release Sites– MFW IntroductionMethodsResultsSummaryQuestions Dexter TR LOP TR LOP FB LOP HOR HCR

Study Area and Release Sites – NS IntroductionMethodsResultsSummaryQuestions Minto TR Detroit FB Detroit HOR

Tagging & Release IntroductionMethodsResultsSummaryQuestions  Hatchery fish used  One-time yearly releases  Major assumption: hatchery fish are phenotypically similar to naturally-produced fish entering the reservoirs (size, timing, behavior, condition, etc.)

Tagging & Release – MFW IntroductionMethodsResultsSummaryQuestions Release Location Release YearDexter TRLOP TRLOP FBLOP HORHCR 20115, ,967* , ,65149, , ,31037,20033, ,52033,95234,54432,769-- *200,673 CWT fish released in addition to PIT tags

Tagging & Release – NS IntroductionMethodsResultsSummaryQuestions Release Location Release YearMinto TRDetroit FBDetroit HOR ,475*--12,465* ,29933,24633, ,46333,48533,478 *75,069 total CWT fish released in addition to PIT tags

Detection & Recovery IntroductionMethodsResultsSummaryQuestions PIT tags ( ):  Outmigrants at Willamette Falls, detection efficiency <10%  Adults at Willamette Falls, detection efficiency 100%  Other researchers CWTs ( ):  Fisheries, hatcheries, spawner surveys

Outmigration Success– MFW IntroductionMethodsResultsSummaryQuestions N=503 N=201 N=2,747 N=534 N=15 N=1,331 N=468 N=383 N=13 N=453 N=600 N=132 N=27

Relative Survival – MFW IntroductionMethodsResultsSummaryQuestions Release Year Release Location Dexter TRLOP TRFBHORHCR y n/a z n/a x n/a y 3.0x10 -4 z w n/a0.013 x y 3.9x10 -4 z w x y 8.2x10 -4 z n/a

Outmigration Success– NS IntroductionMethodsResultsSummaryQuestions N=1,045 N=895 N=1,000 N=844 N=734 N=416 N=469 N=254

Relative Survival – NS IntroductionMethodsResultsSummaryQuestions Release Year Release Location TRFBHOR y n/a0.072 z x y z y y z

Movement Rate– MFW IntroductionMethodsResultsSummaryQuestions N=503 N=201 N=2,747 N=534 N=15 N=1,331 N=468 N=383 N=13 N=600 N=453N=132 N=27 ZZ XY Z W XY Z Y ZZ Z

Movement Rate– NS IntroductionMethodsResultsSummaryQuestions N=1,045 N=895 N=1,000 N=844 N=734 N=416N=469 N=254 Y Z Y Y Z Y Y Z

Growth– MFW IntroductionMethodsResultsSummaryQuestions N=11 N=13 N=81 N=316 N=41 N=9 N=332 N=273 N=79 N=50N=19 N=271 N=195 Y Z Y Z Z Y ZZ Z X X Y Z

Growth– NS IntroductionMethodsResultsSummaryQuestions N=9 N=107 N=372 N=283 N=25 N=18 Y Z YZ Z Z

Juvenile to Adult Survival  MFW: 4 adult returns from 2011 releases (2TR, 2HOR), 7 adult returns from 2012 releases (2TR, 5HOR)  NS: 6 adult returns from 2012 releases (3TR, 3HOR) IntroductionMethodsResultsSummaryQuestions

Key Points No surprises; in general fish released above projects:  Migrated slower to Willamette Falls=lentic environment and dam passage, reservoir fish usually delayed by month or longer  Grew faster than the tailrace group=conducive reservoir growing conditions, possible long term survival advantage? IntroductionMethodsResultsSummaryQuestions

Key Points No surprises; fish released above projects:  Detected at a lower rate=consistent evidence of dam/reservoir impacts related to lower outmigration success; impacts appear to be greater in the MFW  Effect sizes for differences in detections between Dexter TR and LOP HOR: 2011= 2.5:1, 60% 2012= 5.14:1, 80.5% 2013= 3.4:1, 70.6% 2014= 16.78:1, 94%  Effect sizes for differences in detections between Minto TR and Detroit HOR: 2012= 1.17:1, 14.5% 2013= 1.56:1, 36% 2014= 1.64:1, 39% IntroductionMethodsResultsSummaryQuestions

 USACE - Rich Piaskowski, Greg Taylor, Todd Pierce, Doug Garletts, Chad Helms, Nathaniel Erickson et al.  ODFW – Dan Peck & staff, Greg Grenbemer & staff, Fred Monzyk, Jeremy Romer, Ryan Emig, Kelly Reis, Kirk Schroeder, Suzette Savoie  NOAA – Bill Muir (original concept)  Biomark, Inc. – PIT tagging  PSMFC – Tag recovery database  PGE – Interrogation facility Acknowledgments IntroductionMethodsResultsSummaryQuestions

Questions & Discussion

Stayton and Bennett– NS IntroductionMethodsResultsSummaryQuestions  2014 NS releases detected: 2,976 TR, 744 FB, and 353 HOR  Also detected at Willamette Falls: 162 TR (5%), 137 FB (18%), 52 HOR (15%)  2014 STW NS releases detected: 26 TR

Fate IntroductionMethodsResultsSummaryQuestions Anecdotal, but compelling case for substantial predation  MFW: 124 mortalities avian predation  NS: 30 mortalities avian predation  MFW: 198 mortalities piscine predation – 158 from crappie – 18 from walleye – 11 from northern pikeminnow – 10 from largemouth bass – 1 from cutthroat trout

Detections and Discharge– MFW IntroductionMethodsResultsSummaryQuestions

Detections and Discharge– NS IntroductionMethodsResultsSummaryQuestions

Effects of Dam Operations – LOP IntroductionMethodsResultsSummaryQuestions

Effects of Dam Operations – HCR IntroductionMethodsResultsSummaryQuestions

Effects of Dam Operations – Detroit IntroductionMethodsResultsSummaryQuestions

N=15 N=837 IntroductionMethodsResultsSummaryQuestions Lookout Point Reservoir entry, naturally-produced Chinook (Romer et al. 2012) PIT 2011 (64 mm) PIT 2012 (62 mm) PIT 2013 (68 mm) PIT 2014 (74 mm)

IntroductionMethodsResultsSummaryQuestions Detroit Reservoir entry, naturally-produced Chinook (Romer et al. 2012) N = 4,249 N = 27 PIT 2012 (90 mm) PIT 2013 (65 mm) PIT 2014 (74 mm)

Movement Rate– MFW IntroductionMethodsResultsSummaryQuestions Release Year Release Location Dexter TRLOP TRFBHORHCR A n/a 6.16 A n/a A n/a 4.70 B 0.99 C A n/a3.56 B 3.80 C 0.97 D A 2.68 B 2.76 B 2.88 B n/a

Movement Rate– NS IntroductionMethodsResultsSummaryQuestions Release Year Release Location TRFBHOR A n/a7.77 B A 1.68 A 1.31 B A 2.51 A 2.21 B

Growth– MFW IntroductionMethodsResultsSummaryQuestions Release Year Release Location Dexter TRLOP TRFBHORHCR A n/a 0.73 B n/a A n/a 0.97 B 0.69 B A n/a0.89 B 0.90 B 0.64 A A 0.33 A 0.82 B 0.86 C n/a

Growth– NS IntroductionMethodsResultsSummaryQuestions Release Year Release Location TRFBHOR A n/a0.78 B 2013n/a0.71 A 0.68 B 2014n/a0.81 A 0.80 A