Objectives
To supplement and enhance existing stocks of Yakima River fall Chinook, while preserving the stock characteristics and fitness of targeted stocks and keeping ecological and genetic impacts to not-target species within specified limits.

Yakima stock Rearing Treatments

• BY1998-2004 Two types of rearing strategies were utilized for our Yakima stock.
• • Accelerated vs. Conventional (ProsserH).
  • Monitored via PIT tags.

• BY2006 initiated new additional “yearling” strategy.

- Monitoring yearling vs subyearling via PIT tags

Results of Release to McN
BY2006 (2008 release, Neeley 2009) Y: 65.15% S: 49.90% diff: 15.25% N=1,833 BY2007 (*2009 release) *based on straight detections so far (Lind, 2009) Y: 23.90% S: 4.59% diff: 19.31% N=7,516 BY2008 N=~20,000 fish on station

Little White Salmon stock Rearing Treatments

• BY2006 The accelerated treatment was implemented on 500k (eyed eggs) out-of-basin fall chinook transferred from LWS.
• • Smolt SI: 33.8%

• BY2007 (only) PIT tagged LWS conv. cohorts
• • Smolt SI: 47.02% Acc vs 36.6% Conv

• BY2008 data pending

Re-Establishing Summer Chinook in the Yakima River

• Objective: To initiate investigation of the feasibility of establishing an early-run fall Chinook population in the Yakima River, with the goals being to:

• Develop a naturally spawning adult population in the Yakima River between Sunnyside Dam and Roza Dam, and in the lower Naches River from the mouth to the Tieton River, and,
• Increase the number of natural-origin returning summer-run adults in the lower Columbia, Zone 6, and the lower Yakima River contributing to harvest augmentation for both the tribal and sports fishery.

BY2008 Summers
100% females tested for Virus and BKD Results: all keepers! Released ~180,911 from Stiles pond on 6/12/09, lower Naches River. 30,000 PIT, 170,000 CWT only

2007 Redd Surveys above Prosser

• 1,132 over Prosser Dam

• Yakima River- 321 Redds

55.1% Emerald Rd to Granger (RM70-83) 44.9% Granger to Zillah (RM83-91) 0% Zillah to SSD (RM91-104) 0% Union Gap (RM107-117)

• Naches River- 0 Redds

Wapatox Dam to Cowiche Dam

Slide 18

• Marion Drain- 46 Redds

17.4% above Hwy 97 82.6% below Hwy 97

Acknowledgements
YN: Andrew Lewis, Denny Nagle, Conan Northwind, Quincy Wallahee, Joe Jay Pinkham III who carried out the daily field activities to make it happen. Mel Sampson, Dave Fast, Mark Johnston, Todd Newsome, Bill Bosch, Dave Lind, Doug Neeley, Bill Fiander and Ida Sohappy-Ike Prosser and Marion Drain Hatchery: Joe Blodgett, Sonny Fiander and the Hatchery crews. Chandler Juvenile Monitoring Facility: Leroy Senator, Wayne Smartlowit, Sey Billy, Morales Ganuelas, Steve Salinas, Sheila Decoteau and Pharamond Johnson Fall Chinook/Coho Acclimation crew: Nathaniel Pinkham, Markeyta Pinkham, Andrew Castilleja, Sam Shavehead and Emerson Scabbyrobe BIG THANKS TO EACH OF YOU! This project is funded by the Bonneville Power Administration and is administered through Patty Smith.