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The StreamNet Data Store is a searchable archive of data sets related to fish and other aquatic resources that are not of the specific data types included in the main StreamNet database. These data sets come from many different sources and are provided for download in their original formats. To add your own data set to the Data Store, use our Data Publishing Service.
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Natural Reproductive Success and Demographic Effects of Hatchery-Origin Steelhead in Abernathy Creek, Washington
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| Data Categories
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Adult returns
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| Dates of Data
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2005 TO 2017
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| Data Set Status
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In work
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| Data Set Update Schedule
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Annually
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| Date Data Set Published on StreamNet Data Store
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08-22-2017
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| Project Name & Number
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2003-063-00
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| Purpose of Data Set
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Our goal is to determine the natural reproductive success and mean relative fitness of hatchery-origin (HOR) and natural-origin (NOR) steelhead and assess the demographic effects of hatchery fish supplementation in Abernathy Creek relative to two adjacent control streams. The long-term contribution of stocked fish to recruitment of steelhead populations is unknown. Because stocking is only one of several management options for this species, it is critical to learn additional information about factors limiting hatchery production and natural recruitment processes. Information on the effect of rearing technique, size and physiological status of stocked fish, propensity of stocked fish to residualize, and genetic contribution is needed to optimize use of hatchery produced fish while simultaneously conserving wild stocks. We initiated our study by creating steelhead broodstock by captively rearing NOR juveniles to sexual maturity. Since 2003 we have released approximately 20,000 HOR steelhead smolts annually. Our results indicate that the timing of HOR and NOR smolts emigrating out of Abernathy has been similar and that populations among streams has remained relatively constant among years. However, emigrating HOR juvenile fish differ physiologically and morphologically compared to NOR fish and may be less prepared to emigrate into saltwater. As a result the number of residual HOR fish has
doubled since 2004. These residual HOR fish may negatively effect NOR fish via intraspecific competition. Since there is a high level of genetic variability in Abernathy steelhead and the broodstock created with these procedures have returned as adults and reproduced naturally, we will be able to determine reproductive success and demographic effects of hatchery fish supplementation in subsequent years.
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| Summary / Abstract
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Adult salmonids trapped at Abernathy FTC, USFWS 2005 - 2017, BPA Project No. 2003-063-00
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| Broad Biological Groups
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| Taxa
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| Location
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Abernathy Creek, Cowlitz County, Washington
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| NPCC Subbasins (2001 Subbasins)
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Lower Columbia: Columbia lower
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| Hatcheries
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| Dams
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| Keywords
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adult returns, steelhead, coho, cutthroat
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| Lead Person and Organization That Created the Data Set
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US Fish and Wildlife Service (USFWS)
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| Other Participating Organizations
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Funding provided by Bonneville Power Administration
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| Contact Person for Questions About the Data
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Name: John Holmes
Position:
Organization: US Fish and Wildlife Service (USFWS)
Address: 1440 Abernathy Creek Road
Longview,
WA 98632
USA
Phone: 360 425 6072 ext 320
email: john_holmes@fws.gov
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| Broad Category of Methods
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Field
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| Data Collection Methods
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Fish returns diverted into holding pond and captured in V trap
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| File Formats
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Microsoft Excel 2000 or later
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| Data structure description
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See data set files.
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| URL where updated data may be available
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| Contact person for questions about the software, tools, models, etc.
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| Papers, reports, and presentations that were done under this project.
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no
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