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MetaData for Spring Chinook in the Willamette and Sandy Basins, Progress Reports 2006-2007
Spring Chinook in the Willamette and Sandy Basins, Progress Reports 2006-2007
Identification Information
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Citation
- Originator: Schroeder, R.K., K.R. Kenaston and L.K. McLaughlin
- Publish Date: 2008
- Online Link: None
- BPA Project #:
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Contact Information
- Agency: Oregon Department of Fish and Wildlife
- Name: Cedric Cooney
- Job Position: Natural Resources Data and Systems Manager
- Telephone: 503-947-6094
- E-Mail Address: cedric.x.cooney@odfw.oregon.gov
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Description
- Abstract: The Willamette and Sandy rivers support intense recreational fisheries for spring Chinook
salmon (Oncorhynchus tshawytscha). Fisheries in these basins rely primarily on annual hatchery
releases of 5–8 million juveniles. Hatchery programs exist in the McKenzie, Middle Fork
Willamette, North and South Santiam, Clackamas, and Sandy rivers mainly as mitigation for dams
that blocked natural production areas. Some natural spawning occurs in most of the major basins
and a few smaller tributaries upstream of Willamette Falls.
The Oregon Fish and Wildlife Commission adopted the Native Fish Conservation Policy
(ODFW 2003a) and the Hatchery Management Policy (ODFW 2003b) in part to reduce adverse
impacts of hatchery programs on wild native stocks. The Native Fish Conservation Policy
recognizes that naturally produced native fish are the foundation for long-term sustainability of
native species and hatchery programs, and the fisheries they support. Possible risks of artificial
propagation programs have been well documented. Hazards include disease transfer, competition
for food and spawning sites, increased predation, increased incidental mortality from harvest, loss
of genetic variability, genetic drift, and domestication (Steward and Bjornn 1990; Hard et al. 1992;
Cuenco et al. 1993; Busack and Currens 1995; NRC 1996; and Waples 1999). Hatcheries can also
play a positive role for wild salmonids by bolstering populations, especially those on the verge of
extirpation, by providing a genetic reserve as well as providing opportunities for nutrient
enrichment of streams (Steward and Bjornn 1990; Cuenco et al. 1993).
In the past, hatchery programs and fish passage issues were the focus of spring Chinook
salmon management in the Willamette and Sandy basins. Limited information was collected on
the genetic structure among basin populations, on abundance and distribution of natural spawning,
on rearing and migrating of juvenile salmon, or on strategies for reducing risks that large hatchery
programs pose for wild salmon populations. This study is being implemented to gather this
information. A schematic of the study plan is shown in APPENDIX A.
We conducted work in the main-stem Willamette River above Willamette Falls, and in the
Middle Fork Willamette, McKenzie, North Santiam, South Santiam, Clackamas, and Sandy rivers
in 2006 and 2007. Basin descriptions and background information on management and fish runs
can be found in subbasin plans developed by the Oregon Department of Fish and Wildlife (ODFW
1988, ODFW 1992a, ODFW 1992b, and ODFW 1996). Task headings below cross reference the
study plan outlined in APPENDIX A. This report covers tasks that were worked on in late 2005
through early fall 2007.
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- Purpose:
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- Time Period of Content:
- Geographic Extent: McKenzie, Middle Fork Willamette, North and South Santiam, Clackamas, and Sandy rivers
- Status: Final
- Use Constraints:
- Format: PDF File
Data Quality Information
- Lineage-Source:
Data Information
- No data information was supplied.
Entity and Attribute Information
- Attributes Description:
Is a physical copy maintained for reference at Headquarters?
Yes
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