Juvenile salmonid monitoring in the White Salmon River, Washington, post-Condit Dam removal, 2016

Jezorek, Ian G.; Hardiman, Jill M.

doi:10.3133/ofr20171070

Cited by 3 publications

(5 citation statements)

References 6 publications

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“…Precision of smolt estimates could be improved by several methods to increase the number of fish captured or the trap efficiency (Jezorek and Hardiman, 2017). Further assessment of the trap location has resulted in a determination that a larger trap is unlikely to work at this site; however, an additional small trap is a possibility.…”

Section: Discussionmentioning

confidence: 99%

“…Allen, Connolly, Jezorek, Munz, and Charrier (2006) reported a maximum temperature of 23.6 °C at rkm 0.9, and temperatures that exceeded 20 °C throughout the drainage were common. During 2016, water temperature at the mouth of Rattlesnake Creek exceeded 16 °C every day during July and August, with a maximum of 22.8 °C (Jezorek and Hardiman, 2017).…”

Section: Description Of Study Sitementioning

confidence: 99%

“…Since dam removal, a strategy of natural recolonization has been in effect. This followed recommendations of the multi-agency White Salmon Technical Work Group (WSTWG; Jezorek and Hardiman, 2017) and the Endangered Species Act [ESA] Recovery Plan for the White Salmon River (National Marine Fisheries Service, 2013b).…”

Section: Introductionmentioning

confidence: 99%

“…As with steelhead, a broad monitoring approach including juvenile abundance and life-history data will provide the most robust assessment of efficacy of natural recolonization. The WSTWG, a multi-agency (Federal, State, Tribal, and others) group, continues to meet to coordinate ongoing efforts in the White Salmon River watershed (Allen and others, 2016;Jezorek and Hardiman, 2017).…”

Section: Introductionmentioning

confidence: 99%

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Juvenile salmonid monitoring following removal of Condit Dam in the White Salmon River Watershed, Washington, 2017

Jezorek¹,

Hardiman²

2018

Open-File Report

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Condit Dam, at river kilometer 5.3 on the White Salmon River, Washington, was breached in 2011, and removed completely in 2012, providing anadromous salmonids with the opportunity to recolonize habitat blocked for nearly 100 years. Prior to dam removal, a multiagency workgroup concluded that the preferred salmonid restoration alternative was to allow natural recolonization. Monitoring would assess fish recolonization efficacy, followed by management evaluation 5 years after dam removal. Limited monitoring of salmon and steelhead recolonization has occurred since 2011. The U.S. Geological Survey began juvenile salmonid monitoring in 2016 and did a second year during 2017, with sampling efforts like those of 2016. River conditions differed between the 2 years, both during (that is, high flows in 2017) and prior to (that is, 2015 summer drought conditions and December 2015 White Salmon River flood event) sampling. We operated a rotary screw trap at river kilometer 2.3 (3 kilometers downstream of the former dam site) from early April through early June to assess species diversity, and production of smolt and other migrant life stages. We also used backpack electrofishing during summer to assess juvenile salmonid distribution and abundance. Both sampling methods provided the opportunity to collect genetic samples (analysis of samples was not covered under funding received from the Mid-Columbia Fisheries Enhancement Group for the 2017 monitoring efforts) and to tag fish with passive integrated transponder (PIT) tags, which will provide life-history data through future recaptures and detections. The screw trap captured steelhead (anadromous rainbow trout, Oncorhynchus mykiss), fry, parr, and smolts; coho salmon (O. kisutch) fry, parr, and smolts; and Chinook salmon (O. tshwaytscha) fry, parr, and one smolt. Prolonged high water and some missed trapping periods during 2017 prevented us from generating smolt estimates. Despite difficult trapping conditions, the number of coho salmon fry and parr, and steelhead fry and parr captured in 2017 exceeded those captured during 2016. The number of age-0 Chinook salmon captured in the screw trap during 2017 was much higher (n = 222) than in 2016 (n = 4). 2 Electrofishing in tributaries provided information on distribution and abundance of juvenile coho salmon and O. mykiss. Juvenile coho salmon were again found in Mill and Buck Creeks and, for the first time, in Rattlesnake Creek (all three creeks are upstream of the former dam site). In both Rattlesnake and Buck Creeks, age-0 O. mykiss abundance decreased between 2016 and 2017; however, age-1 and older O. mykiss and age-0 coho salmon abundance increased between years at both sites. Data on O. mykiss abundance at sites in Buck and Rattlesnake Creeks is providing the opportunity to begin to understand trends and variability post-dam removal and to compare to pre-dam removal periods. Mean age-0 O. mykiss abundance (fish per meter [fish/m]) at the Rattlesnake Creek site has been slightly lower during post-dam removal (mean = 3.0, n =...

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Section: Discussionmentioning

confidence: 99%

Section: Description Of Study Sitementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Juvenile salmonid monitoring following removal of Condit Dam in the White Salmon River Watershed, Washington, 2017

Jezorek¹,

Hardiman²

2018

Open-File Report

Self Cite

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show abstract

“…Recently, Liermann and others (2017) documented successful transplanting of hatchery-origin adult Coho Salmon in tributary streams in the Elwha River Basin leading to immediate spawning and smolt out-migrants per kilometer comparable to other Coho Salmon populations in the Pacific Northwest. Natural recolonization also has been documented through detection of juvenile productivity in two tributaries and smolt out-migrants in the main stem in the White Salmon River Basin, Washington (Jezorek and Hardiman, 2017). There is still uncertainty about overall capacity and habitat availability, and potential for ecological concerns with other reintroduced species and native Redband Trout.…”

Section: A Geospatial Approach For Ecological Risk Assessmentmentioning

confidence: 99%

Risk assessment for the reintroduction of anadromous salmonids upstream of Chief Joseph and Grand Coulee Dams, Northeastern Washington

Hardiman¹,

Breyta²,

Haskell³

et al. 2017

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Juvenile salmonid monitoring in the White Salmon River, Washington, post-Condit Dam removal, 2016

Cited by 3 publications

References 6 publications

Juvenile salmonid monitoring following removal of Condit Dam in the White Salmon River Watershed, Washington, 2017

Juvenile salmonid monitoring following removal of Condit Dam in the White Salmon River Watershed, Washington, 2017

Risk assessment for the reintroduction of anadromous salmonids upstream of Chief Joseph and Grand Coulee Dams, Northeastern Washington

Juvenile salmonid monitoring to assess natural recolonization following removal of Condit Dam on the White Salmon River, Washington, 2016–21

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