Effects of fasting and temperature on the biological parameters, proximal composition, and fatty acid profile of Chinook salmon (Oncorhynchus tshawytscha) at different life stages

2021 ◽  
pp. 111113
Author(s):  
Bruno C. Araujo ◽  
Jane E. Symonds ◽  
Seumas P. Walker ◽  
Matthew R. Miller
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Life Stages ◽  
Biological Parameters

Age, ration level, and exercise affect the fatty acid profile of chinook salmon (Oncorhynchus tshawytscha) muscle differently

Aquaculture ◽  
2005 ◽  
Vol 243 (1-4) ◽  
pp. 345-356 ◽  
Author(s):  
Anders Kiessling ◽  
J. Pickova ◽  
J.G. Eales ◽  
B. Dosanjh ◽  
D. Higgs
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Ration Level

scholarly journals Decoupling outmigration from marine survival indicates outsized influence of streamflow on cohort success for California’s Chinook salmon populations

2019 ◽  
Vol 76 (8) ◽  
pp. 1398-1410 ◽  
Author(s):  
Cyril J. Michel
Keyword(s):  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Primary Source ◽  
Environmental Drivers ◽  
Life Stages ◽  
Cohort Size ◽  
Seaward Migration ◽  
Productivity Indices ◽  
Marine Survival ◽  
Marine Productivity

Historically, marine survival estimates for salmon have been confounded with freshwater seaward migration (outmigration) survival. Telemetry studies have revealed low and variable survival during outmigration, suggesting marine mortality may not be the primary source of variability in cohort size as previously believed. Using a novel combination of tagging technologies, survival during these two life stages was decoupled over 5 years for Sacramento River Chinook salmon (Oncorhynchus tshawytscha). Outmigration survival ranged from 2.6% to 17%, and marine survival ranged from 4.2% to 22.8%. Influential environmental drivers in both life stages were also compared with smolt-to-adult ratios (SAR) for three Chinook salmon populations over 20 years. Streamflow during outmigration had higher correlation with SAR (r2 > 0.34) than two marine productivity indices (r2 < 0.08). The few SAR estimates that were poorly predicted by flow occurred during years with the lowest marine productivity, suggesting most interannual SAR fluctuations are explained by outmigration survival, but abnormally poor marine conditions also reduce SAR. The outsized influence of flow on SAR provides managers with a powerful mitigation tool in a watershed where flow is tightly regulated.

Fatty Acid Composition of Lipids in the Eggs and Alevins from Wild and Cultured Chinook Salmon (Oncorhynchus tshawytscha)

1993 ◽  
Vol 50 (3) ◽  
pp. 648-655 ◽  
Author(s):  
H. J. Ashton ◽  
D. O. Farkvam ◽  
B. E. March
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Total Lipid ◽  
Polar Lipid ◽  
Chinook Salmon ◽  
Oncorhynchus Tshawytscha ◽  
Wild Fish ◽  
Marine Food Chain ◽  
Neutral And Polar Lipids ◽  
The Mean

The fatty acid profiles of lipids extracted from eggs and alevins of cultured chinook salmon (Oncorhynchus tshawytscha) were significantly different than those from eggs and alevins of wild fish of the same stock. The mean total concentrations of n3 fatty acids in the total lipid of eggs from wild and cultured broodstock were 40.2 and 29.4% and in the polar lipid 45.5 and 38.7% respectively. The mean concentrations of n3 fatty acids in the total lipid of alevins from wild and cultured broodstock were 35.4% and 23.2% and in the polar lipid 43.0 and 38.2%, respectively. The ratios of n3:n6 fatty acids were lower in both the neutral and polar lipids of eggs and of alevins from the cultured fish than in those of wild fish. The higher n3:n6 fatty acid ratios in the eggs and progeny of wild fish reflected the higher ratios in lipids of components of the natural marine food chain.

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