Oceanic, riverine, and genetic influences on spring chinook salmon migration timing

2009 ◽  
Vol 19 (8) ◽  
pp. 1989-2003 ◽  
Author(s):  
James J. Anderson ◽  
W. Nicholas Beer
Keyword(s):  
Chinook Salmon ◽  
Genetic Influences ◽  
Migration Timing

An Evaluation of Rearing Densities to Improve Growth and Survival of Hatchery Spring Chinook Salmon

2013 ◽  
Vol 4 (1) ◽  
pp. 114-123 ◽  
Author(s):  
Douglas E. Olson ◽  
Michael Paiya
Keyword(s):  
Mortality Rate ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Confounding Factor ◽  
Fork Length ◽  
High Density ◽  
Growth And Survival ◽  
Migration Timing ◽  
Rearing Density ◽  
Salmon Stock

Abstract We evaluated growth and survival of spring Chinook salmon Oncorhynchus tshawytscha reared at varying densities at Warm Springs National Fish Hatchery, Oregon. For three consecutive brood years, density treatments consisted of low, medium, and high groups in 57.8-m3 raceways with approximately 16,000, 24,000, and 32,000 fish/raceway, respectively. Fish were volitionally released in both the autumn and spring to mimic the downstream migration timing of the endemic wild spring Chinook salmon stock. Just prior to the autumn release, the rearing density estimate was 4.24 kg/m3 for the low-density group, 6.27 kg/m3 for the medium-density group, and 8.42 kg/m3 for the high-density group. While weight gain did not differ among density treatments (P  =  0.72), significant differences were found in median fork length (P < 0.001) for fish reared at different densities. Fish reared at high density exhibited the highest on-hatchery mortality rate during two brood years; however, differences in mortality rate among densities were not significant (P  =  0.20). In one brood year, adult recovery rates appeared to support the hypothesis that lower initial densities improved postrelease survival (P < 0.01). All rearing densities utilized in this evaluation were relatively low and may partially explain why more differences were not readily apparent among density groups. In addition, the volitional release was a confounding factor in our study because we were unable to quantify the number of fish released in the autumn.

Functional gene diversity and migration timing in reintroduced Chinook salmon

2015 ◽  
Vol 16 (6) ◽  
pp. 1455-1464 ◽  
Author(s):  
Melissa L. Evans ◽  
Samuel J. Shry ◽  
Dave P. Jacobson ◽  
Nicholas M. Sard ◽  
Kathleen G. O’Malley
Keyword(s):  
Chinook Salmon ◽  
Gene Diversity ◽  
Functional Gene ◽  
Migration Timing ◽  
Functional Gene Diversity ◽  
And Migration

Migration Timing of Adult Chinook Salmon into the Togiak River, Alaska, Watershed: Is There Evidence for Stock Structure?

2015 ◽  
Vol 144 (4) ◽  
pp. 829-836 ◽  
Author(s):  
Sydney C. Clark ◽  
Theresa L. Tanner ◽  
Suresh A. Sethi ◽  
Kale T. Bentley ◽  
Daniel E. Schindler
Keyword(s):  
Chinook Salmon ◽  
Stock Structure ◽  
Migration Timing

Stock-Specific Migration Timing of Adult Spring–Summer Chinook Salmon in the Columbia River Basin

2004 ◽  
Vol 24 (4) ◽  
pp. 1145-1162 ◽  
Author(s):  
Matthew L. Keefer ◽  
Christopher A. Peery ◽  
Michael A. Jepson ◽  
Kenneth R. Tolotti ◽  
Theodore C. Bjornn ◽  
...  
Keyword(s):  
River Basin ◽  
Chinook Salmon ◽  
Columbia River ◽  
Columbia River Basin ◽  
Migration Timing

A complex phenotype in salmon controlled by a simple change in migratory timing

Science ◽  
2020 ◽  
Vol 370 (6516) ◽  
pp. 609-613 ◽  
Author(s):  
Neil F. Thompson ◽  
Eric C. Anderson ◽  
Anthony J. Clemento ◽  
Matthew A. Campbell ◽  
Devon E. Pearse ◽  
...  
Keyword(s):  
Chinook Salmon ◽  
Sexual Maturity ◽  
Single Gene ◽  
Genomic Region ◽  
Seasonal Patterns ◽  
Diverse Population ◽  
Complex Phenotype ◽  
Migration Timing ◽  
Simple Change ◽  
Migratory Phenotype

Differentiation between ecotypes is usually presumed to be complex and polygenic. Seasonal patterns of life history in salmon are used to categorize them into ecotypes, which are often considered “distinct” animals. Using whole-genome sequencing and tribal fishery sampling of Chinook salmon, we show that a single, small genomic region is nearly perfectly associated with spawning migration timing but not with adiposity or sexual maturity, traits long perceived as central to salmon ecotypes. Distinct migration timing does not prevent interbreeding between ecotypes, which are the result of a simple, ancient polymorphism segregating within a diverse population. Our finding that a complex migratory phenotype results from a single gene region will facilitate conservation and restoration of this iconic fish.

scholarly journals Variation in Out-migration Timing and Estuary Reliance of “ocean-type” Chinook Salmon in the Fraser River Estuary, BC

2019 ◽  
pp. 25-27
Author(s):  
David Scott ◽  
Lia Chalifour ◽  
Misty MacDuffee ◽  
Julia Baum ◽  
Scott Hinch
Keyword(s):  
Chinook Salmon ◽  
River Estuary ◽  
Fraser River ◽  
Migration Timing

Temperature and Flow Effects on Migration Timing of Chinook Salmon Smolts

2009 ◽  
Vol 138 (6) ◽  
pp. 1252-1265 ◽  
Author(s):  
Gregory E. Sykes ◽  
Chris J. Johnson ◽  
J. Mark Shrimpton
Keyword(s):  
Chinook Salmon ◽  
Migration Timing ◽  
Flow Effects
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