J indicates CRITFC employee.
February 10, 2014
Monitoring Stock-Specific Abundance, Run Timing, and Straying of Chinook Salmon in the Columbia River Using Genetic Stock Identification (GSI)
Genetic stock identification (GSI) provides a method of characterizing stock-specific abundance, run timing, and straying as they pertain to the population demographics and behavior of both hatchery and wild fish and thus assists with fisheries management. In this study, tissues were collected and...
August 15, 2015
Movement Patterns of Artificially Reconditioned Kelt Steelhead Following Release in the Yakima River Basin
To improve the analysis of long-term reconditioning and parental contribution within the Yakima River Basin, we radio/PIT-tagged 70 kelts and solely PIT-tagged an additional 154 kelts in late October of 2013. Kelts were assumed to be rematuring based on their estradiol readings. There were 57% (40)...
Ryan Branstetter, Jeremiah Newell, Chris Frederiksen, Jeff Trammel, Joe Blodgett, William Bosch, Bobby Begay, Neil Graham, Andrew Pierce, Jeff Stephenson, David Fast, and Doug Hatch
April 1, 2015
Multidisciplinary Evaluation of the Feasibility of Parentage-Based Genetic Tagging (PBT) for Management of Pacific Salmon
This report describes the current status of the coastwide coded-wire tag (CWT) system, which provides information allowing the Pacific Salmon Commission (PSC) to meet its obligations under the Pacific Salmon Treaty (PST) to report annual catches, harvest rate indices, estimates of incidental...
William Satterthwaite, Eric Anderson, Matthew Campbell, John Carlos Garza, Michael Mohr, Shawn Narum, and Cameron Speir
June 27, 2002
Bull trout have recently been the focus of intense study in the Pacific Northwest because of their listing as a threatened species. Bull trout are increasingly found only in headwater stream reaches in watersheds that are minimally fragmented by human perturbation and still provide very cold water...
Dale A. McCullough and Shelley Spalding
September 1, 2010
Observations of Fish Behavior Recorded by a DIDSON Sonar Concurrent with Blasting Events During Renovation of the Lyle Falls Fish Ladder
A Dual-Frequency Identification Sonar (DIDSON) sonar was deployed to record fish behavior within the trap of the Lyle Falls Fish Ladder during periods when rock blasting events occurred - events associated with renovation/construction activities. The DIDSON was operated intermittently over the...
Peter Galbreath, Shane Keep, Joseph Zendt, and Chris Frederiksen
June 1, 1986
Spawning ground surveys are one of the primary methods used to estimate the abundance of naturally spawning anadromous fish populations. Fisheries managers have also relied on these surveys to make indirect assessments of historic salmonid productivity, production potential, the quality and...
April 24, 2009
Ocean Harvest Real-Time Forecasts of Fall Chinook Salmon (Oncorhynchus tshawytscha) Returns to the Columbia River
Forecasts of fall Chinook salmon runs to the Columbia River are a critical management component for harvest decisions and monitoring abundance trends because Columbia River fall Chinook salmon form the largest contributing fish group to ocean Chinook fisheries north of Cape Falcon, Oregon, and also...
August 5, 1997
The once abundant stocks of Pacific Lamprey (Lampetra tridentata) above Bonneville Dam are currently depressed. It is likely that many of the same factors that led to the decline of wild stocks of Columbia River Pacific salmon and steelhead have impacted Pacific Lamprey populations. The...
Aaron Jackson, Paul Kissner, Douglas Hatch, Blaine Parker, David Close, Martin Fitzpatrick, and Hiram Li
August 5, 1998
The once abundant stocks of Pacific Lamprey (Lampetra tridentata) above Bonneville Dam are currently depressed. It is likely that many of the same factors that led to the decline of wild stocks of Columbia River Pacific salmon and steelhead have impacted Pacific Lamprey populations as well....
Aaron Jackson, Douglas Hatch, Blaine Parker, David Close, Martin Fitzpatrick, and Hiram Li
November 2, 2020
Parentage-based Tagging Improves Escapement Estimates for ESA-listed Adult Chinook Salmon and Steelhead in the Snake River Basin
Parentage-based tagging (PBT) is a non-lethal, genetic tagging method that has been successfully applied in hatchery supplemented populations to manage hatchery broodstock and monitor hatchery harvest and straying rates. We show that PBT can also improve the accuracy of escapement estimates by...