Growth performance and haematological and immunological indices of rainbow trout (Oncorhynchus mykiss) fingerlings supplemented with dietary Ferulago angulata (Schlecht) Boiss

In this study, the effects of Ferulago angulata extract on the growth, haematological, and immunological indices of rainbow trout (Oncorhynchus mykiss) fingerlings were evaluated. Basal diet was supplemented with 0 (control), 0.5, 1, and 2 g·kg-1 F. angulata and was randomly allocated to experimental fish of an initial average weight of 7.45 ± 0.02 g. After 8 weeks of experiment, the fish supplemented with F. angulata extract showed increased but non-significant (P > 0.05) growth performance. No significant differences were found between trial control groups in haematological indices such as red blood cell count, haematocrit, and haemoglobin, but there was a significant increase in white blood cells, lymphocytes, neutrophils and monocytes in the F. angulata extract groups (P < 0.05). Also, there were significant differences between the fish supplemented with dietary F. angulata extract and the control group regarding immunological indices, including immunoglobulin M, lysozyme, and classical and alternative complement pathway (P < 0.05). These findings suggest that the administration of F. angulata extract has a positive effect on the immunological indices and the immune system activity in rainbow trout fingerling.

Download Full-text

GROWTH PERFORMANCE, BIOCHEMICAL BLOOD PARAMETERS AND MEAT QUALITY OF RAINBOW TROUT (ONCORHYNCHUS MYKISS W.) FED WITH CNICUS BENEDICTUS L. EXTRACT

Trakia Journal of Sciences ◽

10.15547/tjs.2018.04.006 ◽

2018 ◽

Vol 16 (4) ◽

pp. 300-306

Author(s):

R. Koshinski ◽

K. Velichkova ◽

I. Sirakov ◽

S. Stoyanova

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Growth Performance ◽

Meat Quality ◽

Blood Parameters ◽

Control Group ◽

Average Weight ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Final Weight ◽

Blessed Thistle

Aquaculture development is influenced by various environmental factors and nutrition with herbal additives can affect the growth in aquaculture and to improve indicators such as digestibility, nutrition effectiveness and food taste. The purpose of this study was to trace growth performance, meat quality and biochemical blood parameters (glucose, urea, creatinine, total protein, albumin, ASAT, ALAT, Ca, P, Mg, triglycerides, cholesterol) of rainbow trout (Oncorhynchus mykiss W.) fed with additive blessed thistle (Cnicus benedictus L.) extract. To achieve the objective a control group (no added) and an experimental (with added 1363 mg.kg-1 of blessed thistle extract) option, each with a two repetition, were set in a recirculating system in the Aquaculture Base of the Faculty of Agriculture at the Trakia University. Forty specimens from the fish species rainbow trout with an average weight of fish 13.32+3.07 g (control) and 13.33+2.58 g (experimental) in good health condition were placed in each tank and cultivated for 60 days. At the end of the experiment were calculated average final weight, specific growth rates, feed conversion ratio, meat quality and blood parameters. Trout from the experimental group, fed with supplement had with 8.52% higher average final weight compared to the parameter value of fish from control (P<0.001). The blood biochemical parameters ASAT and ALAT in control variant were higher with 27.4% and 44% respectively, compare to values of this parameter of fish from the experimental (P>0.05). Experimental fish fed with additive blessed thistle have a higher electrolytes level of magnesium (Mg) with 5.26% compared to control group (P>0.05). The protein content in the fish of the control group and experimental were of close value, but not statistically proven. The blessed thistle supplementation in the diet led to lower the lipid content in the fillets of the rainbow trout with 19.7% compare to values of this parameter of fish from control group and was statistically proven (P<0.05). This result shows that fish fed with the supplement are more useful and dietetic in their quality as human food. Rainbow trout fed with blessed thistle supplement have better growth performance and blood parameters.

Download Full-text

Effects of Diets Containing Beta-Glucan on Survival, Growth Performance, Hematological, Immunity and Biochemical Parameters of Rainbow Trout (Oncorhynchus Mykiss) Fingerlings

10.21203/rs.3.rs-641367/v1 ◽

2021 ◽

Author(s):

Mohammad Hossein Khanjani ◽

Gholamreza Ghaedi ◽

Moslem Sharifinia

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Growth Performance ◽

Biochemical Parameters ◽

Control Group ◽

Average Weight ◽

Beta Glucan ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Neutrophil Percentage ◽

Significant Difference

Abstract This study aimed to investigate the effect of beta-glucan in rainbow trout’s diet on survival, growth performance, hematological, immunity and biochemical parameters. Rainbow trout (Oncorhynchus mykiss) with an average weight of 6.35 ± 0.09 were stocked in 30 fiberglass tanks with a volume of 200 liters. Four treatments including: control group (0%), 0.5, 1 and 2% of beta-glucan were considered for 8 weeks. The results showed that the survival and growth performance of rainbow trout in the control group were at the lowest level and showed a significant difference with other treatments. The highest percentage of hematocrit (47.9%), white blood cell count, neutrophil percentage (35.2%) was observed in the treatment with 2% beta-glucan. Also, the highest lysosomal activity (59.7 units’ mL− 1, IgM (54.7 mg dL− 1), C3 and C4 was obtained in 2% beta-glucan treatment. Biochemical parameters showed improvement in treatments fed with 1 and 2% beta-glucan. In general, the present study showed that 2% beta-glucan in the diet of rainbow trout improves growth performance, survival, hematological, immunity and biochemical parameters.

Download Full-text

Could the Vitacel R200 improve the Immune Response and Hemato-Biochemical Parameters of Rainbow Trout (Oncorhynchus mykiss) challenged with Aeromonas hydrophila?

International Journal of Drug Delivery Technology ◽

10.25258/ijddt.10.3.4 ◽

2020 ◽

Vol 10 (03) ◽

pp. 332-336

Author(s):

Ali Kane ◽

Nabeel Al-Sharafi ◽

Sabah Hamad

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Aeromonas Hydrophila ◽

Blood Cells ◽

Biochemical Parameters ◽

White Blood Cells ◽

Control Group ◽

Serum Total Protein ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Immune Parameters

The fermentable fiber, Vitacel R200 is industrial compound cellulose exerting many beneficial health effects at the hosts. In this study, rainbow trout (Oncorhynchus mykiss) fingerling (120 ± 4.5 grams) were fed dietary 1% (10 g/kg feed) Vitacel R200 for 7 weeks, then challenged with Aeromonas hydrophila. Two weeks after the challenge, hemato-biochemical and immune parameters in the challenged fish were studied. The lysozyme and complement activity, as well as, white blood cells (WBCs), hemoglobin (Hb%), percentage of neutrophil and eosinophil in the fish fed Vitacel were significantly increased compared with the control group. Furthermore, the serum total protein, albumin, Na+, K+, P, and Ca++ concentrations in the fish fed diet containing 1% Vitacel were significantly increased, while alanine aminotransferase (ALT), alkaline phosphatase (ALP), and aspartate aminotransferase (AST), as well as, cortisol, cholesterol, and glucose concentration were significantly decreased in comparison to the control group. These results concluded that dietary Vitacel could improve the hemato-biochemical and immune parameters, as well as, the stress response in O. mykiss infected with A. hydrophila.

Download Full-text

Effect of dietary phytoextracts supplementation on growth performance and blood parameters of rainbow trout ( Oncorhynchus Mykiss W. ), cultivated in a recirculation system

Trakia Journal of Sciences ◽

10.15547/tjs.2018.04.005 ◽

2018 ◽

Vol 16 (4) ◽

pp. 292-299

Author(s):

K. Georgieva ◽

G. Zhelyazkov

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Red Blood Cells ◽

Growth Performance ◽

Total Protein ◽

Blood Cells ◽

White Blood Cells ◽

Blood Parameters ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Recirculation System

The present research aimed to examine the effect of dietary phytoextracts supplementation on the growth performance, haematological (white blood cells, red blood cells, hemoglobin, hematocrit) and biochemical (glucose, urea, creatinine, total protein, albumin, ASAT, ALAT) blood parameters of rainbow trout (Oncorhynchus mykiss W.), cultivated in a recirculation system. The fish were divided into 6 groups: one control (C) and five experimental groups in whose food was added phytoextracts of curcumin (EC), paprika (EP), thyme (ET), oregano (EO) and garlic (EG). The inclusion of phytoextracts had no significant effect on growth parameters of fish from EC, EP, ET, EO and EG groups (P>0.05). Statistically significantly lower feed consumption per unit weight gain was observed in EO group vs C (Р<0.05). The phytoextract supplementation had significant influence on some of the haematological (white blood cells, red blood cells, hemoglobin) and biochemical (urea, creatinine, total protein, albumin, ASAT, ALAT) blood parameters of rainbow trout.

Download Full-text

Investigation of rainbow trout (Oncorhynchus mykiss) culture in marine floating cages in the Southern Caspian Sea

Journal of Aquaculture & Marine Biology ◽

10.15406/jamb.2020.09.00296 ◽

2020 ◽

Vol 9 (6) ◽

pp. 203-206

Author(s):

SMV Farabi

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Growth Performance ◽

Caspian Sea ◽

Fork Length ◽

Average Weight ◽

Local Market ◽

Fish Yield ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Southern Caspian Sea

There is no long history of fish farming cages in the southern Caspian Sea. The rainbow trout is one of the most important fish raised in the last decade in this sea. The aim of this study was to determine the growth performance and survival of rainbow trout (Oncorhynchus mykiss) in floating cages in the south of the Caspian Sea. In this study, circular polyethylene floating cages with a diameter of 20 meters and a net height of 8 meters were used. The cages were located at a depth of 32 meters in the sea and at a distance of 5.6km from the shore. This research was conducted in 2017-2018 in a marine farm in the central region of the southern Caspian Sea. The fish culture period was 165days from December to May of the following year. For each cage, 37400±570 fish weighing 110±28grams and a fork length of 19.9±1.9cm were introduced. After 165 days, the average weight of fish reached 1200±168g in the marine fish farm. But, the fish yield was supplied with a weight of 700g to the local market, from March and continued to June of the following year (1200g). Fish average daily growth (ADG:g/day) was 6.61±1.02. The value feed conversion ratio of fish and the condition factor was determined 1.03±0.07and 1.42±0.05respectively. The fish special growth rate (SGR:%day-1) was determined1.44±0.09.The fish survival rate (SR%) at the end of during culture wasdetermined95.6±1.07 in cages. The results showed that the growth performance of rainbow trout was suitable in the Caspian Sea's brackish water in floating cages.

Download Full-text

Role of Gut Probionts in Enhancing Growth and Disease Resistance in Rainbow Trout (Oncorhynchus mykiss, Walbaum) Fingerlings

Asian Fisheries Science ◽

10.33997/j.afs.2006.19.1.001 ◽

2006 ◽

Vol 19 (1) ◽

Author(s):

MANPAL SRIDHAR ◽

N. SRIDHAR ◽

P.A.W. ROBERTSON ◽

B. AUSTIN

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Control Diet ◽

Survival Rates ◽

Control Group ◽

Average Weight ◽

High Survival ◽

Bacterial Cells ◽

Fish Food ◽

Rainbow Trout Oncorhynchus Mykiss

Seven out of 34 isolates were selected as putative probionts. These were mixed with an equal volume of a lipid oralizer and incorporated into compounded feed pellets to achieve a dose of 5 x 107 bacterial cells•g-1 of fish food and fed to Rainbow trout Oncorhynchus mykiss fingerlings (average weight 23.69 g) for a period of 25 days. Superior growth (SGR) ranging between 0.32 to 0.57 (P< 0.05) as compared to 0.08 of the control group were obtained in animals fed the probiotic feeds. A challenge of these probiotic fed rainbow trout with intra-peritoneal injections of an inoculum containing x 106 cells•ml-1 of A. Salmonicida (strain PR 107) recorded high survival rates ranging between 38% in group F5 to 78% in group F7 as compared to 20% survival in the animals fed the control diet devoid of any probiotic up to 14 days after challenge. The results of the present study clearly demonstrate the beneficial effects of orally administered probionts in enhancing growth of culture organisms as well as in increasing their resistance to diseases.

Download Full-text

Tarçın (Cinnamomum verum) Yağının Gökkuşağı Alabalığı (Oncorhynchus mykiss) Büyüme Performansı ve Kan Parametreleri Üzerine Etkileri

Turkish Journal of Agriculture - Food Science and Technology ◽

10.24925/turjaf.v7i2.370-376.2360 ◽

2019 ◽

Vol 7 (2) ◽

pp. 370

Author(s):

Osman Sabri Kesbiç

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Growth Performance ◽

Blood Parameters ◽

Serum Glucose ◽

Fish Growth ◽

Control Group ◽

Cinnamon Oil ◽

Rainbow Trout Oncorhynchus Mykiss ◽

Albumin Content

In this study, the effects of supplementation of cinnamon oil on rainbow trout (Oncorhynchus mykiss) feeds on fish growth performance, feed evaluation and blood parameters were investigated. In this scope, experimental diets containing cinnamon oil at 5 different concentrations of 0 mL/kg (TY0), 1 mL/kg (TY1), 2 mL/kg (TY2), 4 mL/kg (TY4) and 10 mL/kg (TY10) were prepared. During the 60 days of the study, the rainbow trout weights of 10,68±0,35 g were used and the experiment was carried out in 100 L volume aquariums with 5 groups of 3 replicate. In the feeding experiment, growth performance and feed utilization of the groups fed with cinnamon oil increased significantly compared to the control group. It was determined that cinnamon oil had significantly increasing effect on erythrocyte, hemoglobin amount and hematocrit ratio in fish. In addition, cinnamon oil decreased the level of serum glucose, triglyceride and cholesterol in the fish, and increased the total protein and albumin content. As a result, feed containing 4 mL/kg of cinnamon oil was affected fish growth performance and blood parameters positively.

Download Full-text

Effects and Safe Inclusion of Narbonne Vetch (Vicia narbonensis) in Rainbow Trout (Oncorhynchus mykiss) Diets: Towards a More Sustainable Aquaculture

Animals ◽

10.3390/ani10112175 ◽

2020 ◽

Vol 10 (11) ◽

pp. 2175

Author(s):

Cristina Tomás-Almenar ◽

Francisco Javier Toledo-Solís ◽

Ana M. Larrán ◽

Eduardo de Mercado ◽

Francisco Javier Alarcón ◽

...

Keyword(s):

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Growth Performance ◽

Raw Materials ◽

Fish Growth ◽

Control Group ◽

Poor Growth ◽

Histopathological Alterations ◽

Vicia Narbonensis ◽

Rainbow Trout Oncorhynchus Mykiss

Aquaculture’s sustainability deeply relies on the identification and inclusion of alternative raw materials. Although meals from insects and/or byproducts from different industries are being recently tested, the meal from terrestrial vegetable species is still the main substitution candidate for fish meal. Here the effects of 0% (Control), 10% (A10) and 30% (A30) inclusion of Narbonne vetch (Vicia narbonensis; ZV-156 strain) meal in rainbow trout (Oncorhynchus mykiss) diets was assessed in a 63-day feeding trial by means of growth performance, histopathological, nutritional value of the fish fillet and blood biochemistry analyses. A dose-response trial was conducted in triplicate with 25 rainbow trout juveniles (20 g average body weight) per 500 L tank. Narbonne vetch meal decreased total intestine protease activity in vitro (from 26.81% to 48% inhibition), although high temperature partially inhibited the action of antinutritional factors (ANFs). No differences in fish growth performance and no severe histopathological alterations on the proximal intestine were observed between 10% Narbonne vetch inclusion and Control groups. In contrast, high inclusion (30%) of Narbonne vetch led to poor growth performance (30% reduction on final growth) and severe histopathological alterations (e.g., loss of brush border integrity, high number of villi fusion, reduced goblet cells density as well as reduced width of submucosa, muscular and serosa layers). Furthermore, while the A30 diet decreased docosahexaenoic fatty acid (FA) content in fish fillets, the A10 diet improved monounsaturated FA content when compared to that of the Control group. No altered levels of cholesterol, glucose or triglycerides in blood plasma and/or histopathological effects on the liver were observed among fish fed the different experimental diets. Although further research efforts (e.g., identifying potential enzymatic treatments to decrease the action of ANFs from Narbonne vetch meal) might be required, present results show that a low inclusion (10%) of Narbonne vetch in rainbow trout diets is possible. The inclusion of locally produced legumes such a Narbonne vetch might be an interesting approach to reduce carbon footprint in European aquaculture and the dependency on other alternative raw materials such as soybean (Glycine max) imported from third countries.

Download Full-text

Graded Incorporation of Defatted Yellow Mealworm (Tenebrio molitor) in Rainbow Trout (Oncorhynchus mykiss) Diet Improves Growth Performance and Nutrient Retention

Animals ◽

10.3390/ani9040187 ◽

2019 ◽

Vol 9 (4) ◽

pp. 187 ◽

Cited By ~ 7

Author(s):

Paulo Rema ◽

Subramanian Saravanan ◽

Benjamin Armenjon ◽

Constant Motte ◽

Jorge Dias

Keyword(s):

Body Composition ◽

Rainbow Trout ◽

Oncorhynchus Mykiss ◽

Growth Performance ◽

Tenebrio Molitor ◽

Nutrient Digestibility ◽

Protein Meal ◽

Yellow Mealworm ◽

Juvenile Rainbow Trout ◽

Rainbow Trout Oncorhynchus Mykiss

Insects are emerging as a sustainable alternative to fishmeal and fish oil in aquafeeds. This study assessed the effect of graded incorporation levels of defatted yellow mealworm (Tenebrio molitor) protein meal on juvenile rainbow trout (Oncorhynchus mykiss) growth performance, body composition, and apparent nutrient digestibility. The trial comprised five dietary treatments: control diet with 25% fishmeal, and four experimental diets with yellow mealworm protein meal at 5%, 7.5%, 15%, or 25%, which corresponded to a fishmeal replacement of 20%, 30%, 60%, or 100%, respectively. After 90 days, the graded incorporation of insect protein meal led to a significant stepwise increase in final body weight, and a significant improvement of specific growth rate, feed conversion ratio, and protein efficiency ratio compared to the control treatment. Regardless of the incorporation level, the insect protein meal had no effects on fish whole-body composition and apparent digestibility coefficients of dry matter, protein, fat, phosphorus, and energy. Protein, phosphorus, and energy retention significantly increased in fish fed the diets with an insect protein meal. In conclusion, the yellow mealworm protein meal could effectively replace 100% of fishmeal in the diet of juvenile rainbow trout with positive effects on its overall zootechnical performance.

Download Full-text