Holocene Paleoflood Hydrology of the Lower Deschutes River, Oregon

2013 ◽  
pp. 121-146
Author(s):  
Kurt J. Hosman ◽  
Lisa L. Ely ◽  
Jim E. O'Connor
Keyword(s):  
Deschutes River

Whirling Disease: Reviews and Current Topics

2002 ◽  
Keyword(s):  
River Basin ◽  
Columbia River ◽  
Fish Populations ◽  
Steelhead Trout ◽  
Adult Fish ◽  
Whirling Disease ◽  
Myxobolus Cerebralis ◽  
Hydroelectric Project ◽  
Natural Production ◽  
Deschutes River

<EM>ABSTRACT. </EM>Anadromous fish were excluded above Pelton Round Butte Hydroelectric Project (PRB Project), located midway (RM 100) on the Deschutes River in central Oregon, beginning in 1968. Reintroduction of these fish above the PRB Project is proposed to meet conservation concerns that arise from lack of natural production and separation of populations. One consideration, when moving fish groups that have been isolated one from the other for thirty years, is that of disease. The health of the fish populations above Round Butte Dam could be seriously jeopardized by the introduction of whirling disease. Straying hatchery steelhead trout <em>Oncorhynchus mykiss </em>were detected with <em>Myxobolus cerebralis </em>spores, in 1987, at Warm Springs National Fish Hatchery, below the PRB Project. <em>Myxobolus cerebralis </em>is established in tributaries of the upper Columbia River basin and of the Snake River basin, where some of these straying hatchery and wild steelhead trout may have originated. From 1997 to 2000, fish from the Deschutes River basin have been sampled for the presence of <em>M. cerebralis</em>. The parasite has been found in both straying hatchery and unmarked adult chinook salmon <em>O. tshawytscha </em>and steelhead trout. Presently there is no evidence of infection of resident fish or in returning adult fish originating from Round Butte Hatchery, although the potential for establishment of <em>M. cerebralis </em>in the Deschutes River watershed cannot be ruled out.

Quaternary Geology and Geomorphology of the Lower Deschutes River Canyon, Oregon

2013 ◽  
pp. 73-94
Author(s):  
Jim E. O'Connor ◽  
Janet H. Curran ◽  
Robin A. Beebee ◽  
Gordon E. Grant ◽  
Andrei Sarna-Wojcicki
Keyword(s):  
Quaternary Geology ◽  
Deschutes River

scholarly journals Bed Mobility on the Deschutes River, Oregon: Tracer Gravel Results

2008 ◽  
Vol 21 (1-2) ◽  
pp. 11-22 ◽  
Author(s):  
Albert Rovira ◽  
G. Mathias Kondolf
Keyword(s):  
Deschutes River ◽  
Bed Mobility

Comparative Susceptibility of Deschutes River, Oregon,Tubifex tubifexPopulations toMyxobolus cerebralis

2011 ◽  
Vol 23 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Christopher M. Zielinski ◽  
Harriet V. Lorz ◽  
Sascha L. Hallett ◽  
Lan Xue ◽  
Jerri L. Bartholomew
Keyword(s):  
Comparative Susceptibility ◽  
Deschutes River

Population structure of sympatric anadromous and nonanadromous Oncorhynchus mykiss: evidence from spawning surveys and otolith microchemistry

2000 ◽  
Vol 57 (10) ◽  
pp. 2152-2162 ◽  
Author(s):  
Christian E Zimmerman ◽  
Gordon H Reeves
Keyword(s):  
Population Structure ◽  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Electron Microprobe ◽  
Otolith Microchemistry ◽  
Maternal Origin ◽  
Isolated Populations ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Deschutes River ◽  
Spawning Sites

Reproductive isolation between steelhead and resident rainbow trout (Oncorhynchus mykiss) was examined in the Deschutes River, Oregon, through surveys of spawning timing and location. Otolith microchemistry was used to determine the occurrence of steelhead and resident rainbow trout progeny in the adult populations of steelhead and resident rainbow trout in the Deschutes River and in the Babine River, British Columbia. In the 3 years studied, steelhead spawning occurred from mid March through May and resident rainbow trout spawning occurred from mid March through August. The timing of 50% spawning was 9-10 weeks earlier for steelhead than for resident rainbow trout. Spawning sites selected by steelhead were in deeper water and had larger substrate than those selected by resident rainbow trout. Maternal origin was identified by comparing Sr/Ca ratios in the primordia and freshwater growth regions of the otolith with a wavelength-dispersive electron microprobe. In the Deschutes River, only steelhead of steelhead maternal origin and resident rainbow trout of resident rainbow trout origin were observed. In the Babine River, steelhead of resident rainbow trout origin and resident rainbow trout of steelhead maternal origin were also observed. Based on these findings, we suggest that steelhead and resident rainbow trout in the Deschutes River may constitute reproductively isolated populations.

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