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Grande Ronde Basin Spring Chinook: Relative Reproductive Success in Captive Chinook Salmon

Grande Ronde Basin Spring Chinook: Relative Reproductive Success in Captive Chinook Salmon. Melissa Baird 1 , Ewann Berntson 1 , Timothy Hoffnagle 2 , Steve Boe 3 , Jim Harbeck 4 , Richard Carmichael 2 , Paul Moran 1 1 National Marine Fisheries Service, Northwest Fisheries Science Center

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Grande Ronde Basin Spring Chinook: Relative Reproductive Success in Captive Chinook Salmon

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  1. Grande Ronde Basin Spring Chinook: Relative Reproductive Success in Captive Chinook Salmon Melissa Baird1, Ewann Berntson1, Timothy Hoffnagle2, Steve Boe3, Jim Harbeck4, Richard Carmichael2, Paul Moran1 1 National Marine Fisheries Service, Northwest Fisheries Science Center 2 Oregon Department of Fish and Wildlife 3 Confederated Tribes of the Umatilla Indian Reservation 4 Nez Perce Tribe Department of Fisheries Resources Management

  2. Catherine Creek

  3. Project Design • Goal is to sample 100% of returning adults • Representative sampling of parr, smolts • Genotyped for 10 microsatellites • Pedigrees reconstructed by exclusion • Relative Reproductive Success (RRS) calculated, normalized to wild

  4. 3 0 0 0 3 2 7 2 0 - 0 3 2 3 2 7 2 0 - 0 2 1 2 0 0 0 2 0 0 0 1 0 0 0 0 0 0 1 2 0 4 2 2 2 2 1 1 2 2 4 2 0 0 0 2 0 0 0 3 2 7 2 1 - 0 3 6 3 2 7 2 1 - 0 1 3 2 0 0 0 3 2 7 2 1 - 0 2 3 1 5 0 0 1 5 0 0 1 0 0 0 1 0 0 0 1 0 0 0 5 0 0 5 0 0 2 2 4 2 0 0 1 9 6 2 0 4 2 1 2 2 0 0 Pedigree analysis match-up

  5. Catherine Creek and Lostine River • Returning adults are progeny of captive brood fish, plus conventional supplementation programs • Early in the program—1.5 generations

  6. Number of Samples Run by Location

  7. Hatchery/Wild returns

  8. p < 0.05

  9. Jacks • Jacks found in relatively low numbers • They do contribute • Lower RS than expected, but some individuals have higher RS • Suggests a large variance in RS for jacks compared to adults

  10. Precocial parr • Approximately 150 caught in traps in 2006 • Most were BY 2005, 5-10% were BY 2004 • Found their parents, but unable to detect any of their offspring • Low likelihood of sampling offspring of PP though • Would like to make note of families producing PP

  11. Results of Chinook pedigree studies • Approximately equal RRS seen across years between hatchery and wild fish in both rivers • Jacks do contribute, but less than expected by number over the weir • Precocial parr gave no sampled offspring, but not surprising

  12. Comparison to O. mykissLittle Sheep Creek, Imnaha • Little Sheep is older supplementation program (est. 1982, ~5 generations) • Large resident population • O. mykiss hatchery rearing is accelerated • Chinook are (in part) progeny of captive brood

  13. p = 0.0009 p = 0.0001 p = 0.0206 p = 0.0000

  14. p = 0.0014 p = 0.0152 p = 0.0001 p = 0.0000

  15. Conclusions from Little Sheep • Hatchery steelhead have significantly lower RRS than wild counterparts in Little Sheep Creek. • Little difference between hatchery males and hatchery females in performance.

  16. Lostine R. Chinook Little Sheep Cr. Sthd Supplementation programs in the Columbia River basin 1.2 Catherine Cr. Chinook 1 0.8 Hood R. Sthd Deschutes (Cww x Cww) Relative Fitness Sthd 0.6 Wenatchee 0.4 Chinook 0.2 Hood R. Sthd (Cww x Ccw) 0 0 1 2 3 4 5 6 Hatchery Generations

  17. Conclusions • Chinook show equal fitness for hatchery vs. wild in Grande Ronde • Different results for other species in the Columbia basin • Difficult to generalize—species, location may have effect

  18. And the million-dollar question… Why? WHY do we see such big differences between species and systems? What factors are involved?

  19. Acknowledgements • This project was funded through BPA contract # 198909600 • Samples provided by ODFW, Nez Perce, and CTUIR

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