scholarly journals Physicochemical parameters associated with the methds of application of salt baths and their field assessment of blood parameters of Atlantic salmon in water pre-smolt stage

2016 ◽  
Vol 48 (2) ◽  
pp. 223-230 ◽  
Author(s):  
V González ◽  
BS Labbé ◽  
V Valerio ◽  
L Vargas-Chacoff ◽  
D Martínez ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Physicochemical Parameters ◽  
Blood Parameters ◽  
Field Assessment

scholarly journals The combined impact of plant-derived dietary ingredients and acute stress on the intestinal arachidonic acid cascade in Atlantic salmon (Salmo salar)

2009 ◽  
Vol 103 (6) ◽  
pp. 851-861 ◽  
Author(s):  
Anthony Oxley ◽  
Cecile Jolly ◽  
Torunn Eide ◽  
Ann-Elise O. Jordal ◽  
Asbjørn Svardal ◽  
...  
Keyword(s):  
Arachidonic Acid ◽  
Atlantic Salmon ◽  
Acute Stress ◽  
Physiological Stress ◽  
Blood Parameters ◽  
Pufa Ratio ◽  
Distal Intestine ◽  
Mediators Of Inflammation ◽  
Order Of Magnitude ◽  
Cox 2

A study was conducted to assess the effect of substituting high levels of dietary fish oil (FO) and fishmeal (FM) for vegetable oil (VO) and plant protein (PP) on the intestinal arachidonic acid (AA) cascade in the carnivorous fish species Atlantic salmon. Four diets were fed to salmon over a period of 12 months, including a control FMFO diet, with varying replacements of plant-derived ingredients: 80 % PP and 35 % VO; 40 % PP and 70 % VO; 80 % PP and 70 %VO. Subsequently, fish were examined pre- (0 h) and post- (1 h) acute stress for blood parameters and intestinal bioactive lipidic mediators of inflammation (prostaglandins). Plasma cortisol responses were greatest in the FMFO group, while 80 % PP and 70 % VO fish exhibited increased plasma chloride concentrations. The n-3:n-6 PUFA ratio in intestinal glycerophospholipids from 70 % VO groups significantly decreased in both proximal and distal regions due to elevated levels of 18 : 2n-6 and the elongation/desaturation products 20 : 2n-6 and 20 : 3n-6. Increases in n-6 PUFA were not concomitant with increased AA, although the AA:EPA ratio did vary significantly. The 40 % PP and 70 % VO diet produced the highest intestinal AA:EPA ratio proximally, which coincided with a trend in elevated levels of PGF2α, PGE2 and 6-keto-PGF1α in response to stress. PGE2 predominated over PGF2α and 6-keto-PGF1α (stable metabolite of PGI2) with comparable concentrations in both intestinal regions. Cyclo-oxygenase-2 (COX-2) mRNA expression was an order of magnitude higher in distal intestine, compared with proximal, and was significantly up-regulated following stress. Furthermore, the 80 % PP and 70 % VO diet significantly amplified proximal COX-2 induction post-stress. Results demonstrate that high replacements with plant-derived dietary ingredients can enhance COX-2 induction and synthesis of pro-inflammatory eicosanoids in the intestine of salmon in response to acute physiological stress.

Physicochemical parameters, lipids stability, and volatiles profile of vacuum-packaged fresh Atlantic salmon (Salmo salar) loins preserved by hyperbaric storage at 10 °C

2020 ◽  
Vol 127 ◽  
pp. 108740 ◽  
Author(s):  
Liliana G. Fidalgo ◽  
Mário M.Q. Simões ◽  
Susana Casal ◽  
José A. Lopes-da-Silva ◽  
Ana Margarida Salgueiro Carta ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Physicochemical Parameters ◽  
Atlantic Salmon Salmo Salar

Reconditioning and Reproductive Responses of Atlantic Salmon Kelts (Salmo salar) to Photoperiod and Temperature Manipulation

1990 ◽  
Vol 47 (4) ◽  
pp. 701-710 ◽  
Author(s):  
C. E. Johnston ◽  
S. R. Farmer ◽  
R. W. Gray ◽  
M. Hambrook
Keyword(s):  
Alkaline Phosphatase ◽  
Atlantic Salmon ◽  
Phosphatase Activity ◽  
Salmo Salar ◽  
Alkaline Phosphatase Activity ◽  
Blood Parameters ◽  
Oocyte Diameter ◽  
Natural Photoperiod ◽  
Temperature Manipulation ◽  
Wild Group

The reproductive cycle of reconditioned Atlantic salmon can be manipulated with light and temperature. Wild Atlantic salmon (Salmo salar) kelts held in freshwater and exposed from late December 1986 to a simulated natural photoperiod (NP) and a regime of two 6-mo seasonally accelerated light increases and decreases (2CP) reconditioned. Fifty-six percent of NP females spawned by early November 1987, 1 mo later than virgin wild females. No 2CP females spawned by December 1987. However, all 2CP females transferred in December 1987 to natural photoperiod and 7 °C water released eggs by June 1988. NP females that spawned showed seasonal peaks in cholesterol in August, triglycerides and calcium in September, and alkaline phosphatase in November; NP and 2CP females that failed to spawn showed no such changes. Alkaline phosphatase activity and calcium concentrations were linearly related to increasing oocyte diameter (but not oocyte number), and were good predictors of sex and oocyte development. Forty-two percent of 2CP males matured and released sperm in mid-August, 1 mo earlier than NP males or a virgin wild group. Twenty-three percent of 2CP males did not mature. Males showed significant differences in blood parameters between regimes and between spawners and nonspawners, but the levels were never as high as maturing females.

scholarly journals Stress Impairs Skin Barrier Function and Induces α2-3 Linked N-Acetylneuraminic Acid and Core 1 O-Glycans on Skin Mucins in Atlantic Salmon, Salmo salar

2021 ◽  
Vol 22 (3) ◽  
pp. 1488
Author(s):  
John Benktander ◽  
Henrik Sundh ◽  
Kristina Sundell ◽  
Abarna V. M. Murugan ◽  
Vignesh Venkatakrishnan ◽  
...  
Keyword(s):  
Atlantic Salmon ◽  
Chronic Stress ◽  
Stress Responses ◽  
Barrier Function ◽  
Acute Stress ◽  
Skin Barrier ◽  
Blood Parameters ◽  
Skin Barrier Function ◽  
Epithelial Barrier Function ◽  
Acute And Chronic Stress

The skin barrier consists of mucus, primarily comprising highly glycosylated mucins, and the epithelium. Host mucin glycosylation governs interactions with pathogens and stress is associated with impaired epithelial barrier function. We characterized Atlantic salmon skin barrier function during chronic stress (high density) and mucin O-glycosylation changes in response to acute and chronic stress. Fish held at low (LD: 14–30 kg/m3) and high densities (HD: 50-80 kg/m3) were subjected to acute stress 24 h before sampling at 17 and 21 weeks after start of the experiment. Blood parameters indicated primary and secondary stress responses at both sampling points. At the second sampling, skin barrier function towards molecules was reduced in the HD compared to the LD group (Papp mannitol; p < 0.01). Liquid chromatography–mass spectrometry revealed 81 O-glycan structures from the skin. Fish subjected to both chronic and acute stress had an increased proportion of large O-glycan structures. Overall, four of the O-glycan changes have potential as indicators of stress, especially for the combined chronic and acute stress. Stress thus impairs skin barrier function and induces glycosylation changes, which have potential to both affect interactions with pathogens and serve as stress indicators.

Microstructure and texture of fresh and smoked Atlantic salmon, Salmo salar L., fillets from fish reared and slaughtered under different conditions

2001 ◽  
Vol 32 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Sjofn Sigurgisladottir ◽  
Margret S. Sigurdardottir ◽  
Helga Ingvarsdottir ◽  
Ole J. Torrissen ◽  
Hannes Hafsteinsson
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
Atlantic Salmon Salmo Salar

Nutrient pattern of unsaturated fatty acids and vitamin E increase resting metabolic rate of overweight and obese women

2020 ◽  
pp. 1-9
Author(s):  
Habib Yarizadeh ◽  
Leila Setayesh ◽  
Caroline Roberts ◽  
Mir Saeed Yekaninejad ◽  
Khadijeh Mirzaei
Keyword(s):  
Vitamin E ◽  
Metabolic Rate ◽  
Unsaturated Fatty Acids ◽  
Resting Metabolic Rate ◽  
Blood Parameters ◽  
Cross Sectional Study ◽  
Obese Women ◽  
Cross Sectional ◽  
Dietary Nutrients ◽  
Nutrient Patterns

Abstract. Objectives: Obesity plays an important role in the development of chronic diseases including cardiovascular disease and diabetes. A low resting metabolic rate (RMR) for a given body size and composition is a risk factor for obesity, however, there is limited evidence available regarding the association of nutrient patterns and RMR. The aim of this study was to determine the association of nutrient patterns and RMR in overweight and obese women. Study design: This cross-sectional study was conducted on 360 women who were overweight or obese. Method: Dietary intake was assessed using a semi-quantitative standard food frequency questionnaire (FFQ). Nutrient patterns were also extracted by principal components analysis (PCA). All participants were evaluated for their body composition, RMR, and blood parameters. Result: Three nutrient patterns explaining 64% of the variance in dietary nutrients consumption were identified as B-complex-mineral, antioxidant, and unsaturated fatty acid and vitamin E (USFA-vit E) respectively. Participants were categorized into two groups based on the nutrient patterns. High scores of USFA-vit E pattern was significantly associated with the increase of RMR (β = 0.13, 95% CI = 0.79 to 68.16, p = 0.04). No significant associations were found among B-complex-mineral pattern (β = −0.00, 95% CI = −49.67 to 46.03, p = 0.94) and antioxidant pattern (β = 0.03, 95% CI −41.42 to 22.59, p = 0.56) with RMR. Conclusion: Our results suggested that the “USFA-vit E” pattern (such as PUFA, oleic, linoleic, vit.E, α-tocopherol and EPA) was associated with increased RMR.

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