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UncertaintyWhat are the range, magnitude, and rates of change of natural spawning fitness of integrated (supplemented) populations, and how are these related to management rules, including the proportion of hatchery fish permitted on the spawning grounds, the broodstock mining rate, and the proportion of natural origin adults in the hatchery broodstock?
ThemeFish propagation
SubthemeConservation/genetic effects
Sources Anadromous Salmonid Monitoring Strategy - Steelhead
Anadromous Salmonid Monitoring Strategy - Spring Chinook
SRG 93-3: Critical Uncertainties in the Program
ISRP 2008-4: 2007 Retrospective Report
ISRP 2011-25: 2011 Retrospective Report
NPCC 2006-3: Research Plan 2006
Criticality Level Priority
Rationale Because supplementation of salmonid populations is a widely used management strategy its effects on natural populations need to be understood. Important questions remain about how deleterious genetic changes may occur in cultured populations. Are genetic changes produced by low founder sizes (i.e., too few individuals contributing genes to the population) inadvertent domestication, variable family survival rates, by a combination of these elements or by other factors? Can management strategies be implemented to reduce the likelihood of genetic changes when fish are placed into hatcheries? Additionally, once genetic changes occur, what impact do they have on the fitness of natural populations that interbreed with hatchery fish? Studies within the Basin have examined how spawning fitness in natural populations of steelhead and spring Chinook has changed due to supplementation, and more studies are underway. Results from these investigations have improved our knowledge of how supplementation programs impact natural populations. Another component of this uncertainty is an assessment of the efficacy of the management guidelines that regulate (1) the proportion of hatchery fish allowed to spawn in nature and (2) the proportion of hatchery fish used as broodstock. These management guidelines are based on evolutionary theory and are logical. Additional empirical assessments, however, are needed to verify assumed effects. This critical uncertainty is from the 2006 Research Plan; see Part 2, ISAB/ISRP 2016-1, CU #4, for a discussion of progress made toward addressing this uncertainty.


Projects that address this uncertainty:

(click to view projects at cbfish.org)

ID Title Sponsor Locations Purpose Emphasis Addresses
198909600 Genetic Monitoring and Evaluation (M&E) Program for Salmon and Steelhead National Oceanic and Atmospheric Administration Artificial Production RM and E Directly
198909800 Salmon Studies in Idaho Rivers Idaho Department of Fish and Game (IDFG), Nez Perce Tribe, Shoshone-Bannock Tribes, US Fish and Wildlife Service (USFWS) Mountain Snake/Salmon Artificial Production RM and E Directly
199000500 Umatilla Hatchery Monitoring and Evaluation (M&E) Oregon Department of Fish and Wildlife Columbia Plateau/Umatilla Artificial Production RM and E Directly
199305600 Advance Hatchery Reform Research National Oceanic and Atmospheric Administration Artificial Production RM and E Directly
199506325 Yakima River Monitoring and Evaluation-Yakima/Klickitat Fisheries Project (YKFP) Yakama Confederated Tribes Columbia Plateau/Yakima Artificial Production RM and E Directly
200003900 Walla Walla River Basin Monitoring and Evaluation (M&E) Umatilla Confederated Tribes (CTUIR) Columbia Plateau/Walla Walla Programmatic RM and E Directly
200302300 Chief Joseph Hatchery Program Colville Confederated Tribes Columbia Cascade/Okanogan Artificial Production Supplementation Directly
200303900 Monitor and Evaluate (M&E) Reproductive Success and Survival in Wenatchee River National Oceanic and Atmospheric Administration, Washington Department of Fish and Wildlife (WDFW) Columbia Cascade/Wenatchee Artificial Production RM and E Directly
200305400 Evaluate the Relative Reproductive Success of Hatchery-Origin and Wild-Origin Steelhead Spawning Naturally in the Hood River Oregon State University Artificial Production RM and E Directly
200306300 Natural Reproductive Success and Demographic Effects of Hatchery-Origin Steelhead in Abernathy Creek, Washington US Fish and Wildlife Service (USFWS) Artificial Production RM and E Directly
200900900 Basinwide Supplementation Evaluation Columbia River Inter-Tribal Fish Commission (CRITFC) Artificial Production RM and E Directly
201003100 Snake River Chinook and Steelhead Parental Based Tagging Idaho Department of Fish and Game (IDFG) Blue Mountain/Grande Ronde, Blue Mountain/Imnaha, Columbia Plateau/Snake Lower, Mountain Snake/Clearwater, Mountain Snake/Salmon Programmatic RM and E Directly
201003300 Study Reproductive Success of Hatchery and Natural Origin Steelhead in the Methow Washington Department of Fish and Wildlife (WDFW) Columbia Cascade/Methow Artificial Production RM and E Directly
198335003 Nez Perce Tribal Hatchery Monitoring and Evaluation (M&E) Nez Perce Tribe Mountain Snake/Clearwater Artificial Production RM and E Indirectly
198805308 Hood River Production Operations and Maintenance (O&M) and Powerdale Oregon Department of Fish and Wildlife Columbia Gorge/Hood Artificial Production Supplementation Indirectly
198806400 Kootenai River White Sturgeon Aquaculture Conservation Facility Kootenai Tribe Mountain Columbia/Kootenai Artificial Production Supplementation Indirectly
198806500 Kootenai River Fishery Investigations Idaho Department of Fish and Game (IDFG) Mountain Columbia/Kootenai Habitat RM and E Indirectly
199000501 Umatilla Basin Natural Production Monitoring and Evaluation (M&E) Umatilla Confederated Tribes (CTUIR) Columbia Plateau/Umatilla Artificial Production RM and E Indirectly
199107300 Idaho Natural Production Monitoring and Evaluation (M&E) Idaho Department of Fish and Game (IDFG) Mountain Snake/Salmon Artificial Production RM and E Indirectly
199501100 Chief Joseph Kokanee Enhancement Colville Confederated Tribes Intermountain/Columbia Upper Habitat Restoration/Protection Indirectly
199604300 Johnson Creek Artificial Propagation Enhancement Nez Perce Tribe Mountain Snake/Salmon Artificial Production Supplementation Indirectly
199703000 Chinook Salmon Adult Abundance Monitoring Nez Perce Tribe Mountain Snake/Salmon Artificial Production RM and E Indirectly
200203100 Growth Modulation in Salmon Supplementation National Oceanic and Atmospheric Administration, University of Washington Columbia Plateau/Yakima Artificial Production RM and E Indirectly
200205300 Asotin Creek Salmon Population Assessment Washington Department of Fish and Wildlife (WDFW) Blue Mountain/Asotin Habitat RM and E Indirectly
200500200 Lower Granite Dam Adult Trap Operations National Oceanic and Atmospheric Administration Artificial Production RM and E Indirectly
200810500 Selective Gear Deployment Colville Confederated Tribes Columbia Cascade/Okanogan Harvest RM and E Indirectly
201003000 Project to provided VSP Estimates for Yakima Steelhead MPG Yakama Confederated Tribes Columbia Plateau/Yakima Programmatic RM and E Indirectly
201005700 B-run steelhead supplementation effectiveness research Idaho Department of Fish and Game (IDFG), Nez Perce Tribe Artificial Production RM and E Indirectly
201201300 Snake River Fall Chinook Monitoring and Evaluation Nez Perce Tribe, Washington Department of Fish and Wildlife (WDFW) Middle Snake/Snake Lower Middle Artificial Production RM and E Indirectly

last updated: Jan 27, 2016