scholarly journals A Study of Stranding of Juvenile Salmon by Ship Wakes Along the Lower Columbia River Using a Before-and-After Design: Before-Phase Results

2006 ◽  
Author(s):  
Walter H. Pearson ◽  
J R. Skalski ◽  
Kathryn L. Sobocinski ◽  
Martin C. Miller ◽  
Gary E. Johnson ◽  
...  
Keyword(s):  
Columbia River ◽  
Juvenile Salmon ◽  
Before And After ◽  
Ship Wakes

Bypass System Modification at Bonneville Dam on the Columbia River Improved the Survival of Juvenile Salmon

2007 ◽  
Vol 136 (6) ◽  
pp. 1487-1510 ◽  
Author(s):  
John W. Ferguson ◽  
Benjamin P. Sandford ◽  
Rachel E. Reagan ◽  
Lyle G. Gilbreath ◽  
Edward B. Meyer ◽  
...  
Keyword(s):  
Columbia River ◽  
Juvenile Salmon

scholarly journals Changes in Fish Assemblages at the Mirror Lake Complex in the Lower Columbia River Before and After a Culvert Modification

2019 ◽  
Vol 39 (6) ◽  
pp. 1348-1359
Author(s):  
Sean Y. Sol ◽  
Amanda C. Hanson ◽  
Keith Marcoe ◽  
Lyndal L. Johnson
Keyword(s):  
Fish Assemblages ◽  
Columbia River ◽  
Mirror Lake ◽  
Before And After

Life history variation in upper Columbia River Chinook salmon (Oncorhynchus tshawytscha): a comparison using modern and ~500-year-old archaeological otoliths

2011 ◽  
Vol 68 (4) ◽  
pp. 603-617 ◽  
Author(s):  
Jessica A. Miller ◽  
Virginia L. Butler ◽  
Charles A. Simenstad ◽  
David H. Backus ◽  
Adam J.R. Kent
Keyword(s):  
Life History ◽  
Chinook Salmon ◽  
Life Histories ◽  
Oncorhynchus Tshawytscha ◽  
Columbia River ◽  
Adult Size ◽  
Limited Information ◽  
Life History Variation ◽  
Archaeological Collections ◽  
Before And After

Conservation planning often occurs only after a species has been extirpated from portions of its historical range and limited information is available on life history diversity prior to development. To provide information on Chinook salmon ( Oncorhynchus tshawytscha ) life history before and after local extirpation, we examined the chemical (87Sr:86Sr, Sr:Ca) and structural composition of modern and archaeological otoliths from the upper Columbia River. We compared otoliths from modern spring (yearling migrant, n = 15) and summer–fall (yearling (n = 7) and subyearling (n = 12) migrants) runs with those from extirpated runs (n = 8) to estimate the number of and similarity among natal environments and reconstruct aspects of the migratory history. Presumptive natal sources were most similar between the archaeological collections and the modern summer–fall run. Chinook salmon represented by the archaeological otoliths also displayed life history traits, including size at freshwater emigration and adult size at return to fresh water, most similar to the summer–fall subyearling run. These data indicate that there is the potential to maintain aspects of predevelopment Chinook salmon life histories in the Columbia River, and strategies that promote maintenance of that life history diversity may be warranted.

scholarly journals Ecology of Juvenile Salmon in Shallow Tidal Freshwater Habitats in the Vicinity of the Sandy River Delta, Lower Columbia River, 2008

2009 ◽  
Author(s):  
Nichole K. Sather ◽  
Gary E. Johnson ◽  
Adam Storch ◽  
David Teel ◽  
John R. Skalski ◽  
...  
Keyword(s):  
Columbia River ◽  
River Delta ◽  
Tidal Freshwater ◽  
Juvenile Salmon ◽  
Freshwater Habitats
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