Susceptibility of Salmonid Species and Hatchery Strains of Chinook Salmon (Oncorhynchus tshawytscha) to Infections by Ceratomyxa shasta

1977 ◽  
Vol 34 (7) ◽  
pp. 933-936 ◽  
Author(s):  
J. L. Zinn ◽  
K. A. Johnson ◽  
J. E. Sanders ◽  
J. L. Fryer
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Drainage System ◽  
Columbia River ◽  
Columbia River Basin ◽  
Susceptibility To Infection ◽  
Salmonid Species ◽  
Low Prevalence

Nine salmonid species and nine hatchery strains of chinook salmon (Oncorhynchus tshawytscha) were examined for susceptibility to infection by Ceratomyxa shasta. All salmonid species tested were susceptible to infection by this myxosporidan, although no deaths occurred in the Atlantic salmon (Salmo salar). The level of resistance varied widely among the different species. A low prevalence of ceratomyxosis occurred in hatchery strains of chinook salmon from the Columbia River basin, while those chinook strains derived from outside this drainage system were highly susceptible to the parasite. Key words: Oncorhynchus tshawytscha, salmonidae, ceratomyxosis, Ceratomyxa shasta, resistance, susceptibility

Captive rearing for Chinook salmon (Oncorhynchus tshawytscha) and Atlantic salmon (Salmo salar): the Idaho and Maine experiences

2014 ◽  
Vol 24 (3) ◽  
pp. 849-880 ◽  
Author(s):  
Eric J. Stark ◽  
Ernest J. Atkinson ◽  
Christine C. Kozfkay
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Atlantic Salmon Salmo Salar ◽  
Captive Rearing

scholarly journals Increased mitochondrial DNA diversity in ancient Columbia River basin Chinook salmon Oncorhynchus tshawytscha

PLoS ONE ◽  
2018 ◽  
Vol 13 (1) ◽  
pp. e0190059 ◽  
Author(s):  
Bobbi M. Johnson ◽  
Brian M. Kemp ◽  
Gary H. Thorgaard
Keyword(s):  
Mitochondrial Dna ◽  
River Basin ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Columbia River ◽  
Columbia River Basin ◽  
Dna Diversity

scholarly journals Virulence and Infectivity of UC, MD, and L Strains of Infectious Hematopoietic Necrosis Virus (IHNV) in Four Populations of Columbia River Basin Chinook Salmon

Viruses ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 701
Author(s):  
Daniel G. Hernandez ◽  
William Brown ◽  
Kerry A. Naish ◽  
Gael Kurath
Keyword(s):  
River Basin ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Columbia River ◽  
Infectious Hematopoietic Necrosis Virus ◽  
Host Susceptibility ◽  
Columbia River Basin ◽  
Species Variation ◽  
Necrosis Virus ◽  
Infectious Hematopoietic Necrosis

Infectious Hematopoietic Necrosis Virus (IHNV) infects juvenile salmonid fish in conservation hatcheries and aquaculture facilities, and in some cases, causes lethal disease. This study assesses intra-specific variation in the IHNV susceptibility of Chinook salmon (Oncorhynchus tshawytscha) in the Columbia River Basin (CRB), in the northwestern United States. The virulence and infectivity of IHNV strains from three divergent virus genogroups are measured in four Chinook salmon populations, including spring-run and fall-run fish from the lower or upper regions of the CRB. Following controlled laboratory exposures, our results show that the positive control L strain had significantly higher virulence, and the UC and MD strains that predominate in the CRB had equivalently low virulence, consistent with field observations. By several experimental measures, there was little variation in host susceptibility to infection or disease. However, a small number of exceptions suggested that the lower CRB spring-run Chinook salmon population may be less susceptible than other populations tested. The UC and MD viruses did not differ in infectivity, indicating that the observed asymmetric field prevalence in which IHNV detected in CRB Chinook salmon is 83% UC and 17% MD is not due to the UC virus being more infectious. Overall, we report little intra-species variation in CRB Chinook salmon susceptibility to UC or MD IHNV infection or disease, and suggest that other factors may instead influence the ecology of IHNV in the CRB.

Escapement, harvest, and unknown loss of radio-tagged adult salmonids in the Columbia River – Snake River hydrosystem

2005 ◽  
Vol 62 (4) ◽  
pp. 930-949 ◽  
Author(s):  
Matthew L Keefer ◽  
Christopher A Peery ◽  
William R Daigle ◽  
Michael A Jepson ◽  
Steven R Lee ◽  
...  
Keyword(s):  
Oncorhynchus Mykiss ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Columbia River ◽  
Upper Bounds ◽  
Columbia River Basin ◽  
Conservation Priorities ◽  
Reward Program ◽  
Quantitative Assessments ◽  
Spawning Sites

Accurate estimates of escapement by adult anadromous salmonids are difficult, especially in large, multistock river systems. We used radiotelemetry and a fishery reward program to calculate escapement, harvest, and unaccounted for loss rates for 10 498 adult chinook salmon (Oncorhynchus tshawytscha) and 5324 steelhead (Oncorhynchus mykiss) during six return years in the Columbia River basin. Mean annual escapements to spawning sites, hatcheries, or the upper bounds of the monitored hydrosystem were 73.4% (spring–summer chinook salmon), 61.3% (fall chinook salmon), and 62.6% (steelhead). Mean reported harvest rates were 8.7% (spring–summer chinook), 22.0% (fall chinook), and 15.1% (steelhead) within the mainstem hydrosystem and 5.9%, 3.4%, and 5.7%, respectively, in lower hydrosystem tributaries. On average, 12%–17% of each run had unknown fates in the mainstem hydrosystem. Escapement, harvest, and loss varied significantly between runs and years, within runs between known-origin subbasin stocks, and between interdam river reaches. Multiyear quantitative assessments like this can reduce uncertainty, clarify inter- and intra-annual variability, and help managers better evaluate fisheries, identify conservation priorities, and help protect evolutionarily significant populations.

Diet, feeding patterns, and prey selection of subyearling Atlantic salmon (Salmo salar ) and subyearling chinook salmon (Oncorhynchus tshawytscha ) in a tributary of Lake Ontario

2017 ◽  
Vol 33 (3) ◽  
pp. 502-508
Author(s):  
J. H. Johnson ◽  
K. J. Nash ◽  
R. A. Chiavelli ◽  
J. A. DiRado ◽  
G. E. Mackey ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Prey Selection ◽  
Lake Ontario ◽  
Feeding Patterns ◽  
Atlantic Salmon Salmo Salar ◽  
Selection Of

scholarly journals Soybean meal-induced enteritis in Atlantic salmon ( Salmo salar) and Chinook salmon ( Oncorhynchus tshawytscha ) but not in pink salmon ( O . gorbuscha )

Aquaculture ◽  
2018 ◽  
Vol 483 ◽  
pp. 238-243 ◽  
Author(s):  
Marije Booman ◽  
Ian Forster ◽  
John C. Vederas ◽  
David B. Groman ◽  
Simon R.M. Jones
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Soybean Meal ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Pink Salmon ◽  
Atlantic Salmon Salmo Salar
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