scholarly journals Integrated Diet Analyses Reveal Contrasting Trophic Niches for Wild and Hatchery Juvenile Chinook Salmon in a Large River Delta

2018 ◽  
Vol 147 (5) ◽  
pp. 818-841 ◽  
Author(s):  
Melanie J. Davis ◽  
Isa Woo ◽  
Christopher S. Ellings ◽  
Sayre Hodgson ◽  
David A. Beauchamp ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
Large River ◽  
River Delta ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook ◽  
Diet Analyses ◽  
Large River Delta ◽  
Trophic Niches

scholarly journals Foraging and Growth Potential of Juvenile Chinook Salmon after Tidal Restoration of a Large River Delta

2014 ◽  
Vol 143 (6) ◽  
pp. 1515-1529 ◽  
Author(s):  
Aaron T. David ◽  
Christopher S. Ellings ◽  
Isa Woo ◽  
Charles A. Simenstad ◽  
John Y. Takekawa ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
Large River ◽  
River Delta ◽  
Growth Potential ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook ◽  
Large River Delta

Can behavioral fish-guidance devices protect juvenile Chinook salmon (Oncorhynchus tshawytscha) from entrainment into unscreened water-diversion pipes?

2014 ◽  
Vol 71 (8) ◽  
pp. 1209-1219 ◽  
Author(s):  
Timothy D. Mussen ◽  
Oliver Patton ◽  
Dennis Cocherell ◽  
Ali Ercan ◽  
Hossein Bandeh ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Central Valley ◽  
Large River ◽  
Water Diversion ◽  
Small Scale ◽  
Fish School ◽  
Juvenile Chinook Salmon ◽  
Juvenile Chinook ◽  
And Behavior

Entrainment through water-diversion structures is a major passage challenge for fishes in watersheds worldwide. Behavioral guidance devices may be effective in passing fish by diversion inlets, thereby decreasing entrainment without reducing water-diversion rates, but data on their effectiveness is limited. In California’s central valley, out-migrating Chinook salmon (Oncorhynchus tshawytscha) are a species at risk for entrainment through unscreened, small-scale water-diversion pipes. Therefore, we tested entrainment susceptibility and behavior of juvenile Chinook salmon in a large-river-simulation flume at a “river” velocity of 0.15 m·s–1 with a 0.46 m diameter pipe diverting water at 0.57 m3·s–1, during the day and night. Compared with control conditions (no fish deterrent devices present), mean fish entrainment increased by 61% (day) and 43% (night) when underwater strobe lights were active, decreased by 30% when using a metal vibrating (12 Hz) ring during the night, and was unaffected by velocity cap attachments. Fish entrainments started at water velocities of 0.8 m·s–1 and decreased by 54% from spring to summer, possibly resulting from decreased pipe-passage frequency and smaller fish-school sizes. Our findings suggest that substantial entrainment can occur if fish repeatedly pass within 1.5 m of active unscreened diversions, with an estimated 50% of fish lost after encountering 18 pipes in spring and 50 pipes in summer.

scholarly journals Survival and migration route probabilities of juvenile Chinook salmon in the Sacramento-San Joaquin River Delta during the winter of 2009-10

2012 ◽  
Author(s):  
Russell W. Perry ◽  
Jason G. Romine ◽  
Scott J. Brewer ◽  
Peter E. LaCivita ◽  
William N. Brostoff ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
River Delta ◽  
Migration Route ◽  
Juvenile Chinook Salmon ◽  
San Joaquin River ◽  
Juvenile Chinook ◽  
And Migration

scholarly journals Sensitivity of survival to migration routes used by juvenile Chinook salmon to negotiate the Sacramento-San Joaquin River Delta

2012 ◽  
Vol 96 (2-3) ◽  
pp. 381-392 ◽  
Author(s):  
Russell W. Perry ◽  
Patricia L. Brandes ◽  
Jon R. Burau ◽  
A. Peter Klimley ◽  
Bruce MacFarlane ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
River Delta ◽  
Migration Routes ◽  
Juvenile Chinook Salmon ◽  
San Joaquin River ◽  
Juvenile Chinook

Route Use and Survival of Juvenile Chinook Salmon through the San Joaquin River Delta

2013 ◽  
Vol 33 (1) ◽  
pp. 216-229 ◽  
Author(s):  
Rebecca A. Buchanan ◽  
John R. Skalski ◽  
Patricia L. Brandes ◽  
Andrea Fuller
Keyword(s):  
Chinook Salmon ◽  
River Delta ◽  
Juvenile Chinook Salmon ◽  
San Joaquin River ◽  
Juvenile Chinook
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