1. www.fishsciences.net Adult Entry to Summer Juvenile Rearing of Klamath River Coho Randolph Ericksen Steven Cramer Ian Courter Kathryn Arendt Funded by Bureau of Reclamation

2. www.fishsciences.net

3. Overview Adult entry, migration, and survival

4. www.fishsciences.net Overview Adult entry, migration, and survival Juvenile production

5. www.fishsciences.net Overview Adult entry, migration, and survival Juvenile production Redistribution of fry and parr through summer

6. www.fishsciences.net

7. Spawning Distribution

8. www.fishsciences.net Adult Migration and Survival

9. www.fishsciences.net Adult Entry and Migration: Klamath mouth to Trinity River Yurok Tribal Harvest Data Willow Creek Weir Data 8/179/14 10/1211/0912/07 1/04

10. www.fishsciences.net Adult Entry and Migration: Trinity to Salmon River Limited coho telemetry data One week later than mouth to Trinity 8/179/14 10/1211/0912/07 1/04

11. www.fishsciences.net Adult Entry and Migration: Scott River to Shasta River Shasta River Counting Facility 8/179/14 10/1211/0912/07 1/04

12. www.fishsciences.net Adult Entry and Migration: Shasta River to Iron Gate Dam Iron Gate Hatchery Returns 8/179/14 10/1211/0912/07 1/04

13. www.fishsciences.net Coho Passage through Main Stem Reaches Klamath to Trinity RTrinity to Salmon R Salmon R to Portuguese Ck Portuguese Ck to Scott RScott R to Shasta RShasta R to Iron Gate Dam 8/179/14 10/1211/0912/07 1/04 8/179/14 10/1211/09 12/07 1/048/179/14 10/1211/09 12/07 1/04

14. www.fishsciences.net Adult Migration and Survival Adult entry and migration In-river fishery & predation

15. www.fishsciences.net Fixed Inriver Mortality Rates Net Fisheries = 4.5% Pinniped Predation = 1.7%

16. www.fishsciences.net Adult Migration and Survival Adult entry and migration Inriver fishery & predation Prespawn mortality – temperature related

17. www.fishsciences.net Prespawning Mortality Rates for Trinity River Chinook and Coho 1989–1990 Spring

18. www.fishsciences.net Pre-spawn Survival

19. www.fishsciences.net Trinity River Chinook Escapement and Pre-spawn Mortality 1978–1992

20. www.fishsciences.net Adult Migration and Survival Adult entry and migration Inriver fishery & predation Prespawn mortality – temperature related Egg viability

21. www.fishsciences.net Adult Migration and Survival Adult entry and migration Inriver fishery & predation Prespawn mortality – temperature related Egg viability Egg loss – flow related

22. www.fishsciences.net “Based on the limited data collected from these surveys, coho salmon that spawn in the main stem of the Klamath River build larger redds in deeper water than coho salmon found in other rivers. Main stem Klamath River coho salmon also build redds where water velocity is near or above the upper end of the preferred range.” —Magneson and Gough 2006.

23. www.fishsciences.net

24. Relationship of Shear Stress to Discharge Based on Four Cross-sections of Klamath River

25. www.fishsciences.net Peak Discharge at Iron Gate Dam 1960–2005

26. www.fishsciences.net Adult Migration and Survival Adult entry and migration Inriver fishery & predation Prespawn mortality – temperature related Egg viability Egg loss – flow related Females

27. www.fishsciences.net Proportion of Female Spawners Fixed Proportion of Females = 0.55

28. www.fishsciences.net Juvenile Coho Production Natal smolt production estimated for each spawning tributary (Tech memo 5) Fry and parr movement from non- natal streams (this Tech memo) Non-natal smolt production (Final Report)

29. www.fishsciences.net

31. Relationship between Migrant Fry and Female Spawners for Eight Oregon Streams

32. www.fishsciences.net Regression Analysis of Migrant Fry and Female Spawners from Oregon Streams StreamHabitat (km)Reg. slopenR2R2 p Needle Br.1.062380.880.000 Flynn Cr.1.451790.970.000 Deer Cr.2.319490.900.000 Mill Cr (Yaq)4.224280.900.000 Winchester Cr. 6.525860.920.000 Cascade Cr.11.53980.020.077 Mill Cr. (Sil.)18.08480.740.001 WF Smith48.05670.990.000

33. www.fishsciences.net Slope of Migrant Fry per Female Spawner vs. Km of Habitat

34. www.fishsciences.net Predicting Number of Fry Migrating from Tributaries Migrant fry = (Females)*549.28*(km of habitat -0.5972 )

35. www.fishsciences.net Fry and Parr Movement Fry dispersal Age 0 movement from Scott & Shasta –Later migration of parr triggered by increasing temperatures and decreasing flows –Age 0 smolts emigrating from Shasta River

36. www.fishsciences.net Estimated Age 0 Migrants from Scott and Shasta Rivers Scott RiverShasta River 20052006200420052006 Fry22,482436423,12133 Parr58,0161,3364609,411367 Age 0 smolt6333,049470 Age 0 migrants80,4981,7721,13515,581870

37. www.fishsciences.net Relationship between Migrant Parr and Migrant Fry for the Scott (2005 and 2006) and Shasta Rivers (2004–2006).

38. www.fishsciences.net Predicting Number of Age 0 Migrant Parr and Smolt from the Scott and Shasta Rivers Migrant parr = (Migrant fry)*2.589 Age 0 smolt = (Migrant parr)*0.28 + 436

39. www.fishsciences.net Non-natal movement assumptions Parr will only move from main stem into tributaries associated with thermal refugia. Parr will only move to non-natal tributaries within their reach. Non-natal parr will only utilize habitat not fully seeded by natal fish. Parr use of non-natal habitat decreases with distance upstream.

40. www.fishsciences.net Percent of summer capacity available to non-natal juvenile coho Distance (m) from main stem Potential capacity available to migrants 0-400100% 400-80080% 800-1,20020% 1,200-1,6005% > 1,6000