scholarly journals Biofortified Diets Containing Algae and Selenised Yeast: Effects on Growth Performance, Nutrient Utilization, and Tissue Composition of Gilthead Seabream (Sparus aurata)

2022 ◽  
Vol 12 ◽  
Author(s):  
Mariana Ferreira ◽  
Pedro C. Ribeiro ◽  
Laura Ribeiro ◽  
Marisa Barata ◽  
Valentina F. Domingues ◽  
...  
Keyword(s):  
Sparus Aurata ◽  
Control Diet ◽  
Nutrient Utilization ◽  
Fish Growth ◽  
Human Consumption ◽  
Gilthead Seabream ◽  
Tissue Composition ◽  
The Impact ◽  
New Strategies

Efforts have been made to find natural, highly nutritious alternatives to replace fish meal (FM) and fish oil (FO), which can simultaneously promote fish health and improve the nutritional quality of filets for human consumption. This study evaluated the impact of biofortified diets containing microalgae (as replacement for FM and FO), macroalgae (as natural source of iodine) and selenised yeast (organic source of selenium) on gilthead seabream growth, nutrient utilization, tissue composition and gene expression. A control diet (CTRL) with 15% FM and 5.5% FO was compared with three experimental diets (AD1, AD2, and AD3), where a microalgae blend (Chlorella sp., Tetraselmis sp., and DHA-rich Schizochytrium sp.) replaced 33% of FM. Diet AD1 contained 20% less FO. Diets were supplemented with Laminaria digitata (0.4% AD1 and AD2; 0.8% AD3) and selenised yeast (0.02% AD1 and AD2; 0.04% AD3). After feeding the experimental diets for 12 weeks, growth was similar in fish fed AD1, AD2, and CTRL, indicating that microalgae meal can partially replace both FM and FO in diets for seabream. But AD3 suppressed fish growth, suggesting that L. digitata and selenised yeast supplementation should be kept under 0.8 and 0.04%, respectively. Despite lower lipid intake and decreased PUFAs bioavailability in fish fed AD3, compared to CTRL, hepatic elovl5 was upregulated resulting in a significant increase of muscle EPA + DHA. Indeed, filets of fish fed AD2 and AD3 provided the highest EPA + DHA contents (0.7 g 100 g–1), that are well above the minimum recommended values for human consumption. Fish consuming the AD diets had a higher retention and gain of selenium, while iodine gain remained similar among diets. Upregulation of selenoproteins (gpx1, selk, and dio2) was observed in liver of fish fed AD1, but diets had limited impact on fish antioxidant status. Overall, results indicate that the tested microalgae are good sources of protein and lipids, with their LC-PUFAs being effectively accumulated in seabream muscle. Selenised yeast is a good fortification vehicle to increase selenium levels in fish, but efforts should be placed to find new strategies to fortify fish in iodine.

scholarly journals Low dietary inclusion of nutraceuticals from microalgae improves feed efficiency and modifies intermediary metabolisms in gilthead sea bream (Sparus aurata)

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Erick Perera ◽  
David Sánchez-Ruiz ◽  
María Isabel Sáez ◽  
Alba Galafat ◽  
André Barany ◽  
...  
Keyword(s):  
Feed Efficiency ◽  
Sparus Aurata ◽  
Control Diet ◽  
Sea Bream ◽  
Metabolic Enzyme ◽  
Hepatosomatic Index ◽  
Hepatic Glycogen ◽  
Gilthead Seabream ◽  
Plasma Lactate ◽  
Alpha Linolenic Acid

Abstract The aim of this work was to evaluate two functional feeds for the gilthead seabream, Sparus aurata, containing low inclusion of two microalgae-based products (LB-GREENboost, LBGb; and LB-GUThealth, LBGh). Fish (12–13 g) were fed for 13 weeks a control diet or one of the four diets supplemented with both products at 0.5% or 1%. LBGb and LBGh did not affect specific growth rate or survival, but increased feed efficiency by decreasing feed intake and enlarging the intestines. LBGb increased hepatosomatic index and reduced cortisol levels in plasma, while both products lowered plasma lactate. Extensive metabolite and metabolic enzyme profiling revealed that microalgae supplementations, especially 1% LBGh: (i) decrease plasma lactate and increase hepatic glycogen, (ii) reduce hepatic gluconeogenesis, (iii) enhance hepatic lipogenic activity and lipid secretion, (iv) led fish to double triglyceride content in muscle and to stimulate its lipid oxidative capacity, and (v) increase the content of monounsaturated fatty acids and the omega-3 alpha-linolenic acid in muscle. This study demonstrates that both microalgae-based products are suited to improve feed efficiency and orchestrate significant changes in the intermediary metabolism in gilthead seabream juveniles.

Culinary preparation effects on lipid and sensory quality of farmed gilthead seabream (Sparus aurata) and meagre (Argyrosomus regius): An inter-species comparison

2019 ◽  
Vol 301 ◽  
pp. 125263 ◽  
Author(s):  
Niki Alexi ◽  
Dimitra Kogiannou ◽  
Ioanna Oikonomopoulou ◽  
Nick Kalogeropoulos ◽  
Derek V. Byrne ◽  
...  
Keyword(s):  
Sensory Quality ◽  
Sparus Aurata ◽  
Gilthead Seabream ◽  
Species Comparison ◽  
Argyrosomus Regius ◽  
Farmed Gilthead Seabream

Meat composition and quality of young growing Belgian Blue bulls offered a fattening diet with selenium enriched cereals

2015 ◽  
Vol 95 (3) ◽  
pp. 465-473 ◽  
Author(s):  
Youcef Mehdi ◽  
Antoine Clinquart ◽  
Jean-Luc Hornick ◽  
Jean-François Cabaraux ◽  
Louis Istasse ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Meat Quality ◽  
Dry Matter ◽  
Control Diet ◽  
Human Consumption ◽  
Oxidative Rancidity ◽  
Water Losses ◽  
Meat Composition ◽  
Basal Concentration

Mehdi, Y., Clinquart, A., Hornick, J.-L., Cabaraux, J.-F., Istasse, L. and Dufrasne, I. 2015. Meat composition and quality of young growing Belgian Blue bulls offered a fattening diet with selenium enriched cereals. Can. J. Anim. Sci. 95: 465–473. The objective of this study was to evaluate the effects of selenium (Se) enrichment of cereals on the performance of Belgian Blue bulls, meat quality and chemical composition. Twenty-three bulls were used in the present study. Twelve bulls were offered a control diet containing Se at a basal concentration of 58 µg kg−1 of dry matter (DM) and the other 11 bulls were given a diet containing 173 µg kg−1 DM of Se by means of Se-enriched spelt and barley. The Se enrichment of the diet did not affect the growth performance, the slaughter data or meat quality (P > 0.05). There were no effects of Se on tenderness, oxidative rancidity and water losses. However, there were some effects of Se enrichment on the meat chemical composition. The ether extract was decreased from 2.1 to 1.7% DM (P<0.05). There was also significant Se enrichment (P<0.001) in the longissimus thoracis muscle (177 vs. 477 ng g−1 DM) and organs: liver (474 vs. 1126 ng g−1 DM) and kidney (4956 vs. 5655 ng g−1 DM), Under such conditions, the human consumption of a piece of such meat or liver can provide a large part of the recommended daily Se intake, estimated between 30 and 57%.

Body weight changes, nutrient utilization and intestinal microflora of African catfish (Clarias gariepinus) fed Aloe barbadensis leaves

2021 ◽  
Vol 43 (1) ◽  
pp. 385-398
Author(s):  
S. I. Ajibola ◽  
S. O. Obasa ◽  
A. K. Akintokun ◽  
I. Abdulraheem
Keyword(s):  
Weight Gain ◽  
Growth Performance ◽  
Intestinal Microflora ◽  
Control Diet ◽  
Clarias Gariepinus ◽  
Nutrient Utilization ◽  
Fish Growth ◽  
African Catfish ◽  
Weight Changes ◽  
Aloe Barbadensis

Immuno-nutrition studies have shown that some nutrients are linked to the immunological status of fish. Growth performance, nutrient utilization and intestinal microflora were examined in Clarias gariepinus. The 120 C. gariepimus fingerlings (weight, 2.33±0.07g)were fed Aloe barbadensis leaves-paste supplemented diets in 40L freshwater-filled plastic tanks ad libitum twice daily for 12 weeks. The experimental diets containing 40% crude protein were supplemented with three concentration of A. barbadensis leaves-paste: ABL1-1%; ABL2-2%; ABL3-3% and control-0%. Mean weight gain (MWG) and percentage weight gain (PWG) increased (p<0.05) as the concentration of A. barbadensis increased. MWG (17.95±0.78) and PWG (772.2±54.94) were highest in fish fed ABL3 and lowest MWG (11.92±1.16) and PWG (17.95±0.78) in fish fed control diet. Nutrients were better utilized among the diets supplemented group at different significant levels (p < 0.05). The highest value of ANPU was observed in ABL1 when compared to all other treatments including the control. Survival rate decreased as concentration of paste increased. There were no significant differences (p>0.05) in the total bacterial counts (TBC) in A. barbadensis leaves-paste supplemented diets and the control having the highest TBC (23.67 ±0.88 x 105 CFU/ml). Growth of total fungal counts (TFC) was not observed in ABLI. There was a reduction in TFC as the concentration increased in the other supplemented diets, and the control having the highest TFC (7.67 ± 0.44 x 105CFU/ml). The study concluded that inclusion of 1% A. barbadensis leaves-paste as supplement in the diet could effectively improve the growth performance, nutrient utilization and survival of cultured C. gariepinus. A. barbadensis leaves-paste could also reduce the microbial load of the fish.

Ecological monitoring of livestock complexes on groundwater quality (on the example of the pig breeding farm № 11 JV LLC "Nyva Pereiaslavschyny")

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
V. Serdiuk ◽  
◽  
V. Maksin ◽  
Keyword(s):  
Groundwater Quality ◽  
Water Samples ◽  
Negative Impact ◽  
Groundwater Resources ◽  
Human Consumption ◽  
Modern Approach ◽  
Protection Zone ◽  
Quality Of Water ◽  
The Impact

Agriculture, especially livestock, is rated as one of the most polluting industries in the world. In the other hand there is a modern approach to the technology implementation, and is this true that with its usage the impact on the environment is so critical and inevitably leads to environmental catastrophe. It is important to investigate and scientifically substantiate the impact of modern livestock complexes on the environment, especially on groundwater resources objectively,. And only after a number of studies conducted on pig farms with a capacity of 30 and 50 thousand heads per year it would be possible to determine next: is livestock an object of ultra-intensive pollution, or it is an object that does not have a significant negative impact on the environment and is also an economic and food lever of the country. The research was conducted on the example of the company JV LLC "NYVA PEREIASLAVSCHYNY" that is located in two districts of Kyiv region – Brovarskyi and Boryspilskyi. The sanitary protection zone size is 1500 meters to the nearest residential development (MINISTRY OF HEALTH OF UKRAINE, 1996). Projects to reduce the sanitary protection zone have not been developed as there is no need for it. Research of water quality was performed according to State Sanitary Regulations and Rules “Hygienic Requirements to Quality of Water Intended for Human Consumption” “2.2.4-171-10” (State Water Agency of Ukraine, 2010). It was conducted on samples that were taken from 4 artesian wells that are located on the territory of the pig breeding farm № 11. The aim of the research is to identify the impact of the pig breeding farm’s № 11 activity on the underground aquifer and surface water body. To reach this target water samples were collected according to the requirements established in the conclusion on environmental impact assessment from wells in the villages and river. Studies that were conducted during 2020 showed that the quality of water in wells meets the requirements for drinking water. Water samples from wells and ponds showed deviations from the norm up to 10 times. Previous studies did not set a negative impact of the pig breeding farm № 11 on groundwater quality.

scholarly journals Towards a deeper understanding of fatty acid bioaccessibility and its dependence on culinary treatment and lipid class: a case study of gilthead seabream (Sparus aurata)

2016 ◽  
Vol 116 (10) ◽  
pp. 1816-1823 ◽  
Author(s):  
Sara Costa ◽  
Cláudia Afonso ◽  
Carlos Cardoso ◽  
Rui Oliveira ◽  
Francisca Alves ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Lipid Class ◽  
Sparus Aurata ◽  
Gilthead Seabream ◽  
Total Lipids ◽  
Class A ◽  
The Impact ◽  
Long Chain

AbstractThe bioaccessibility of total lipids and fatty acids (FA) in raw and grilled gilthead seabream (Sparus aurata) was determined using an in vitro digestion model. The particular impact of grilling on the FA profile of seabream was also studied. In addition, the influence of lipid class on the bioaccessibility of each FA was analysed. Grilling did not change the relative FA profile, and only the absolute values were altered. However, the relative FA profile varied across lipid classes, being more dissimilar between TAG and phospholipids. Long-chain SFA and PUFA seemed to be less bioaccessible. Moreover, grilling reduced bioaccessibility of protein, fat and many FA, with the highest reductions found in PUFA such as the DHA. Strong evidence supporting a predominantly regioselective action of lipase during in vitro digestion was found, and the impact of this phenomenon on FA bioaccessibility was assessed.

scholarly journals Evaluation of the quality of "pure water" sold in Niamey, Niger

2021 ◽  
Vol 14 (9) ◽  
pp. 3412-3427
Author(s):  
Bachir Mijitaba Sahirou ◽  
Mahaman Sani Laouali ◽  
Abdoulkadri Ayouba Mahamane ◽  
Hassane Hassane Adamou ◽  
Haoua Amadou ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Physicochemical Parameters ◽  
Pure Water ◽  
Water Storage ◽  
Residual Chlorine ◽  
Human Consumption ◽  
The Sun ◽  
The One ◽  
The Impact

In recent years, sachet water known as "pure water" has gained the confidence of the Nigerien public because of its low price, availability, convenience, and quality perception by consumers. This study highlights the impact of storage on the quality of pure water sold in Niamey. Thus, eleven of the twelve analyzed physicochemical parameters have been monitored during six weeks of "pure water" storage in the sun and at laboratory ambient temperature. From the results obtained, the physicochemical parameters are in norms except the turbidity and the residual chlorine. On the Bacteriological plan, the total germs, the salmonellae, the fecal streptococci and the Escherichia coli have been identified. In addition, the monitoring of the evolution of the parameters analyzed during six weeks of storage revealed a change of the organoleptic quality that appears in the fourth week and a development of Escherichia Coli for the "pure water" exposed in the sun. This study showed, on the one hand, that these "pure water" would be unfit to the human consumption and on the other hand, their storage for a prolonged period and a high temperature affects their qualities. Les eaux conditionnées en sachet plastique, communément appelées "pure water", ont depuis quelques années, gagné la confiance du public nigérien en raison de leur faible prix, leur disponibilité, la commodité, et de la perception de qualité par les consommateurs. Ce travail étudie l’impact du stockage sur la qualité des "pure water" vendues à Niamey. Ainsi, onze parmi les douze paramètres physico-chimiques analysés ont été suivis pendant six semaines de stockage des "pure water" au soleil et à la température ambiante de laboratoire. A l’issue des résultats obtenus, les paramètres physico-chimiques sont dans les normes hormis la turbidité et le chlore résiduel. Sur le plan bactériologique, les germes totaux, les salmonelles, les streptocoques fécaux et les Escherichia colis ont été identifiés. Par ailleurs, le suivi de l’évolution des paramètres analysés pendant six semaines de stockage a révélé une altération de la qualité organoleptique qui se manifeste à la quatrième semaine et un développement des Escherichia colis pour les "pure water" exposées au soleil. Cette étude a montré, d’une part, que ces "pure water" seraient impropres à la consommation humaine et d’autre part, leur stockage pendant une période prolongée et une température élevée affecte leurs qualités.

scholarly journals Effects of Dietary Fishmeal Replacement by Poultry By-Product Meal and Hydrolyzed Feather Meal on Liver and Intestinal Histomorphology and on Intestinal Microbiota of Gilthead Seabream (Sparus aurata)

2021 ◽  
Vol 11 (19) ◽  
pp. 8806
Author(s):  
Pier Psofakis ◽  
Alexandra Meziti ◽  
Panagiotis Berillis ◽  
Eleni Mente ◽  
Konstantinos A. Kormas ◽  
...  
Keyword(s):  
Amino Acid ◽  
Intestinal Microbiota ◽  
Sparus Aurata ◽  
Control Diet ◽  
Specific Pattern ◽  
Gilthead Seabream ◽  
Amino Acid Supplementation ◽  
Feather Meal ◽  
Acid Supplementation ◽  
Fishmeal Replacement

The effects on liver and intestinal histomorphology and on intestinal microbiota in gilthead seabream (Sparus aurata) fed diets that contained poultry by-product meal (PBM) and hydrolyzed feather meal (HFM) as fishmeal replacements were studied. Fish fed on a series of isonitrogenous and isoenergetic diets, where fishmeal protein of the control diet (FM diet) was replaced by either PBM or by HFM at 25%, 50% and 100% without amino acid supplementation (PBM25, PBM50, PBM100, HFM25, HFM50 and HFM100 diets) or supplemented with lysine and methionine (PBM25+, PBM50+, HFM25+ and HFM50+ diets). The use of PBM and HFM at 25% fishmeal replacement generated a similar hepatic histomorphology to FM-fed fish, indicating that both land animal proteins are highly digestible at low FM replacement levels. However, 50% and 100% FM replacement levels by either PBM or HFM resulted in pronounced hepatic alterations in fish with the latter causing more severe degradation of the liver. Dietary amino acid supplementation delivered an improved tissue histology signifying their importance at high FM replacement levels. Intestinal microbiota was dominated by Proteobacteria (58.8%) and Actinobacteria (32.4%) in all dietary groups, but no specific pattern was observed among them at any taxonomic level. This finding was probably driven by the high inter-individual variability observed.

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