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MetaData for Klamath Mountains Province Steelhead Project, 1999 Annual Report Report Number: OPSW-ODFW-2002-09
Klamath Mountains Province Steelhead Project, 1999 Annual Report Report Number: OPSW-ODFW-2002-09
Identification Information
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Citation
- Originator: Satterthwaite, T.D.
- Publish Date: November 2002
- 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 steelhead supplement to the Oregon Plan for Salmon and
Watersheds (OSPW) is intended to maintain wild steelhead populations
in Oregon at sustainable and productive levels that provide
substantial environmental, cultural, and economic benefits. The OSPW
attempts to better define “sustainable and productive” by committing
the Oregon Department of Fish and Wildlife (ODFW) to establish
“Population Health Goals” for each Evolutionary Significant Unit (ESU)
of wild steelhead within the state. In addition, section ODFW IB1S of
the plan calls for ODFW to assess adult escapement and juvenile
production of wild steelhead in each ESU.
The National Marine Fisheries Service identified seven ESUs for
steelhead in Oregon and concluded that steelhead produced in coastal
basins between Cape Blanco in southern Oregon and the Klamath River
Basin in northern California constitutes one ESU. This area closely
corresponds to the geologic boundaries of the Klamath Mountains
Province (KMP). Steelhead in the KMP differ from those in adjoining
areas because of distinctive life history and genetic characteristics
(Busby et al. 1994).
Primary differences in life history parameters have been
identified for wild KMP steelhead. Summer steelhead and winter
steelhead differ in time of return as adults, tendency to return to
fresh water on a false spawning migration (the “half-pounder” run),
age at ocean entry, growth rate and migration patterns of juveniles in
fresh water (ODFW 1990a; ODFW 1994). As a result of these
differences, separate health goals seem warranted for summer and
winter steelhead populations. Winter steelhead inhabit streams
throughout the KMP, while summer steelhead are found only in a portion
of the Rogue River Basin. However, the distribution of summer and
winter steelhead overlap in major areas of the Rogue River Basin
(Everest 1973) and as juveniles of the respective races cannot be
differentiated, some population health goals will have to apply to
both races.
The status of wild steelhead in the Klamath Mountains Province
ESU is not readily apparent. Busby et al. (1994) concluded that the
steelhead in this ESU “is not now at risk of extinction, but if
present trends continue, it is likely to become so in the foreseeable
future”. In contrast, Chilcote (1998) concluded that almost all
steelhead populations in the Oregon portion of the ESU “are relatively
healthy and certainly do not warrant listing as threatened under the
ESA”. Uncertainty as to the status of the resource, coupled with the
comprehensive conservation plan developed by Oregon and the
termination of wild fish harvest in all streams except the Rogue
River, lead the National Marine Fisheries Service to defer a listing
of KMP steelhead under the Endangered Species Act. However, KMP
steelhead remained a candidate species during 1999.
The goal of this project is to develop and implement assessment
methods to determine the status of wild steelhead in the Oregon
portion of the KMP. Project objectives include (1) develop population
health goals and allied monitoring methods and (2) determine resource
status in relation to health goals. Attainment of all of the
population health goals will likely indicate that the populations of
wild steelhead in the KMP are healthy and may allow managers to
restore harvest opportunities for wild fish. Conversely, failure to
attain any of the population health goals will likely indicate that
the populations are depressed and would likely lead to actions
designed to minimize fishing mortality. However, in most years it is
likely that some goals will be attained while some will not be
attained. Under that scenario, and depending on which goals are
attained, selective fisheries, like the current one for wild winter
steelhead in the Rogue River, remain as viable options for fishery
managers.
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- Purpose:
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- Time Period of Content:
- Geographic Extent: Klamath Mountain Province
- 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: Field attribute information is available in the attached file(s).
Is a physical copy maintained for reference at Headquarters?
No
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2002-09.pdf
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