scholarly journals Multi-Approach Assessment for Stress Evaluation in Rainbow Trout Females, Oncorhynchus mykiss (Walbaum, 1792) from Three Different Farms during the Summer Season

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1810
Author(s):  
Paul Uiuiu ◽  
Călin Lațiu ◽  
Tudor Păpuc ◽  
Cristina Craioveanu ◽  
Andrada Ihuț ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Biochemical Parameters ◽  
Principal Component ◽  
Environmental Parameters ◽  
Blood Parameters ◽  
Summer Season ◽  
Farmed Fish ◽  
Blood Profile ◽  
Blood Biochemical

Blood biochemistry parameters are valuable tools for monitoring fish health. Their baseline values are still undefined for a multitude of farmed fish species. In this study, changes in the blood profile of rainbow trout females (Oncorhynchus mykiss) from three farms were investigated using different biomarkers during the summer season. In the given context, the main water physicochemical parameters were investigated and twelve biochemical parameters were measured from blood samples of rainbow trout reared in the Fiad, Șoimul de Jos, and Strâmba farms. We selected these farms because the genetic background of the rainbow trout is the same, with all studied specimens coming from the Fiad farm, which has an incubation station. Forty-five samples were collected monthly (May to August) throughout summer to observe the changes in the blood profile of rainbow trout. Principal component analysis showed a clear separation both among the studied farms and months. Furthermore, significant correlations (p < 0.05) between the majority of the biochemical parameters were found, indicating that the environmental parameters can influence several blood parameters at the same time. The present study provides several useful norms for assessing the welfare of rainbow trout, indicating that the relationships among different parameters are important factors in interpreting the blood biochemical profiles.

scholarly journals Growth performance, biochemical blood parameters and meat quality of rainbow trout ( Oncorhynchus Mykiss W. ) fed with licorice ( Glycyrrhiza Glabra L. ) supplemented diet

2018 ◽  
Vol 16 (4) ◽  
pp. 284-291 ◽  
Author(s):  
I. Sirakov ◽  
K. Velichkova ◽  
S. Stoyanova ◽  
Y. Staykov
Keyword(s):  
Rainbow Trout ◽  
Meat Quality ◽  
Biochemical Parameters ◽  
Blood Parameters ◽  
Quality Parameters ◽  
Glycyrrhiza Glabra ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Blood Biochemical ◽  
Recirculation System ◽  
Final Weight

Licorice (Glycyrrhiza glabra) is medicinal plant characterized with sweet flavor which has been used in Bulgarian traditional medicine to improve the condition of the digestive tract and could positively affect digestibility and assimilation of feed nutrients in human and animal organisms. The studies connected with the effect of licorice in fish are limited. The aim of current study was to find the effect of feed supplemented with licorice Glycyrrhiza glabra on growth performance, blood parameters and meet quality in rainbow trout (Oncorhynchus mykiss W.), raised in the recirculation system. The fish were fed with two feeds: control feed (CF) - without the addition of supplement and experimental feed (EF), with supplementation of 300 mg.kg-1 licorice in pellets. The stocking density of rainbow trout in recirculation system was 50 pcs.m-3. The initial average weight of fish in CF variant was 13.30 ±3.07 g and in EF variant was 13.40±3.55 g without differences being statistically significant (p≥0.05). The continuation of the experiment was 60 days. The average final weight, meat quality, and blood biochemical parameters were measured at the end of the experiment. The SGR and FCR were also calculated. Fish from the experimental group fed with a supplement of licorice had with 8.54% higher average final weight compared to the parameter’s value in trouts from the control variant (p<0.05). SGR in rainbow trout’sfrom experimental variants was higher with 6.9% compared to the value of SGR in fish from CF variant. The blood biochemical parameters in experimental trouts were not significantly affected by supplementation of licorice extract. The average values of glucose, ASAT, and ALAT in control variant were higher respectively with 3.96%, 57.2% and 10.3% compared to values in these parameters measured in the blood of fish from the experimental variant, but differences were not statistically proven (p≥0.05). The meat quality parameters were affected from the addition of licorice in feed for trouts and the moisture, fat, and ash quantities were higher respectively with 2.49%, 36.4% and 12.5% compared with the average values of these parameters found for fish from CF group (p<0.05). The extract from licorice added to feed for the feeding of rainbow trout increases the growth of fish and affect the meat quality parameters (p<0.05), but did not affect significantly the blood parameters (p≥0.05).

scholarly journals Effect of monosodium glutamate on growth performance and blood biochemical parameters of rainbow trout (Oncorhynchus mykiss W.)

2019 ◽  
Vol 12 (7) ◽  
pp. 1008-1012 ◽  
Author(s):  
Georgi Zhelyazkov ◽  
Deyan Stratev
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Growth Performance ◽  
Biochemical Parameters ◽  
Monosodium Glutamate ◽  
Live Weight ◽  
Control Fish ◽  
Blood Biochemical Parameters ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Blood Biochemical

Aim: This study aimed to evaluate the effect of dietary monosodium glutamate (MSG) on growth performance and blood biochemical parameters of rainbow trout (Oncorhynchus mykiss W.). Materials and Methods: A total of 200 trouts were allotted in five experimental groups (n=40) that for 60 days received feed supplemented with MSG at the following levels: 0% (K) or 0.5% (E) or 1% (F) or 3% (G) or 5% (H). Results: The average initial weight of trouts was 116.68±1.51 g (K), 116.58±1.33 g (E), 116.43±1.39 g (F), 117.40±1.47 g (G), and 115.95±1.88 g (H). At the end of the trial, control fish (K) had the lowest live weight (242.90±3.87 g) compared to Groups E (252.70±5.69 g), F (250.93±4.82 g), G (248.25±4.98 g), and H (247.95±4.74 g). Feed conversion ratio (FCR) of control group (K) was higher (1.11±0.02) versus FCR values established in Groups E (1.03±0.01), F (1.04±0.02), G (1.07±0.03), and H (1.06±0.02). Albumin, aspartate aminotransferase, gamma-glutamyl transpeptidase, alkaline phosphatase, phosphorus, magnesium, and triglyceride exhibited statistically significant differences versus controls. Conclusion: The results from the study showed that dietary supplementation of rainbow trouts with MSG increased live weight and reduced FCR. The optimum level of MSG recommended for addition to feed was 0.5%.

scholarly journals Productive traits, blood biochemical parameters and meat quality of rainbow trout (Oncorhynchus mykiss W.) fed with supplement of nutmeg extract (Myristica fragrans)

2020 ◽  
Vol 12 (4) ◽  
pp. 324-330
Author(s):  
Ts. Stoev ◽  
G. Zhelyazkov
Keyword(s):  
Fatty Acid ◽  
Rainbow Trout ◽  
Weight Gain ◽  
Oncorhynchus Mykiss ◽  
Sunflower Oil ◽  
Biochemical Parameters ◽  
Live Weight ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Blood Biochemical ◽  
Recirculation System

Abstract. The aim of the present study was to evaluate the effect of the dietary nutmeg extract (Myristica fragrans) supplement on the survival rate, weight gain, feed conversion ratio (FCR), economic efficiency (ECR), blood biochemical parameters, chemical composition and fatty acid profile of rainbow trout (Oncorhynchus mykiss W.), cultivated in a recirculation system. One hundred and sixty rainbow trouts were distributed in two experimental variants, each with two replications with 80 fish in one group. The average initial live weight of trouts from control (C) and experimental (E) groups was 13.43±0.33 g and 13.46±0.29 g, respectively. Fish were reared in concrete tanks with effective volume of 0.8 m3, part of a recirculation system. Trouts were fed „Aqua garant UNI“ extruded feed produced by Garant-Tiernahrung Gesellschaft m.b.H. – Austria, with pellet size of 2 mm. The feed of fish from the experimental group was supplemented with 1% powdered nutmeg extract (P.I.C.Co LTD), by lubricating the pellets with 5 ml sunflower oil/100 g feed. Control rainbow trouts received feed lubricated with the same amount of sunflower oil. Fish from both groups were fed 3 times daily and their ration was 3% of body weight. The experimental period lasted 60 days. The dietary supplementation of rainbow trouts with nutmeg extract had a negative impact on growth performance and economic efficiency of farming of the species. Final live weight and average individual weight gain were lower, and FCR and ECR values were inferior vs controls. The nutmeg extract had also an adverse effect on water content and dry matter of meat from supplemented fish. A positive effect was demonstrated only on meat fat content, which was substantially lower compared to that of control fish. Despite the higher SFA as well as lower UFA, MUFA, PUFA, n-6 and n-3 fatty acid content of trout meat that received nutmeg extract with feed, the PUFA/SFA and n-6/n-3 ratios remained within the favourable range for human nutrition, e.g. >0.4 and <5, respectively.

scholarly journals Long-Term Assessment of Baseline Blood Biochemistry Parameters in Rainbow Trout (Oncorhynchus mykiss) Maintained under Controlled Conditions

Animals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1466
Author(s):  
Paolo Pastorino ◽  
Stefania Bergagna ◽  
Daniela Dezzutto ◽  
Raffaella Barbero ◽  
Marzia Righetti ◽  
...  
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Biochemical Parameters ◽  
Linear Regression Analysis ◽  
Principal Component ◽  
Gamma Glutamyl Transferase ◽  
Rainbow Trout Oncorhynchus Mykiss ◽  
Controlled Conditions ◽  
Baseline Values ◽  
Glutamyl Transferase

Twelve biochemical parameters were measured in serum blood samples from rainbow trout (Oncorhynchus mykiss) maintained under controlled conditions. Forty-five samples were taken every 3 months (T1–T4) over the course of one year to define baseline values. The effect of fish total weight (TW) was also evaluated. Principal component analysis showed a clear separation between T4 and T1, and T2 and T3, indicating an increase in certain biochemical parameters with weight. Linear regression analysis showed how TW significantly explained 11–67% of the variability observed for nine parameters out of 12. Pearson’s correlation matrix showed a significant positive correlation (p < 0.05) between TW and albumin, alkaline phosphatase, alanine-aminotransferase, creatinine, gamma-glutamyl transferase, magnesium, phosphorus and total protein. Furthermore, significant correlations (p < 0.05) between the majority of the biochemical parameters were found, indicating that growth can influence several parameters at the same time. The present study provides several useful baseline values for assessing the health of O. mykiss, indicating that fish weight is an important factor for interpreting the blood biochemical profile.

Gross pathology, blood chemistry, lipid and peroxide contents in rainbow trout ( Oncorhynchus mykiss Walbaum) affected by experimental Arcobacter cryaerophilus infection at low water temperature

2009 ◽  
Vol 57 (2) ◽  
pp. 305-317 ◽  
Author(s):  
Seyit Aydin ◽  
Hayati Gure ◽  
Hasan Cakici ◽  
Serhat Colakoglu ◽  
Recep Bircan
Keyword(s):  
Rainbow Trout ◽  
Oncorhynchus Mykiss ◽  
Water Temperature ◽  
Cold Water ◽  
Lipid Peroxide ◽  
Environmental Parameters ◽  
Blood Parameters ◽  
Careful Consideration ◽  
Blood Indices ◽  
The Brain

Arcobacter cryaerophilus was isolated from naturally infected rainbow trout ( Oncorhynchus mykiss Walbaum), and its pathogenicity was tested by intramuscular injection using healthy 1-year-old rainbow trout under cold-water conditions (at 5 °C). The lethal dosage of 50% end point (LD 50 ) for A. cryaerophilus was calculated as 7.79 × 10 5 viable cells. Experimental infection caused gross clinical abnormalities such as fallen scales, exophthalmia, oedema in injection region and at the base of fins, pale gills, kidney necrosis, hyperaemic areas in pale liver, haemorrhagic spots in heart, elongated spleen and swollen gallbladder. Activities of aspartate aminotransferase and alkaline phosphatase, and concentrations of glucose, total protein, albumin, cholesterol, triglyceride and calcium in the serum of the experimentally infected rainbow trout were significantly decreased compared with the healthy fish. Positive correlations were observed among blood parameters. Total lipid weights increased in the brain, muscle and liver tissues of infected fish and dropped in the gill and spleen tissues. Lipid peroxide contents in the brain, liver, kidney, spleen, muscle and gill tissues of infected rainbow trout were significantly higher than in healthy animals. The present work shows that A. cryaerophilus can be moderately virulent for rainbow trout at low water temperature, and changes in lipid and lipid peroxide contents of tissues and blood indices can highlight barely detectable effects of A. cryaerophilus infection in rainbow trout under laboratory conditions. However, the application of these indices in farm biomonitoring using rainbow trout will need more detailed studies and a careful consideration of the environmental parameters.

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