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Arthrospira platensis is one of the most important cultured microalgal species in the world. Arthrospira complete dry biomass (ACDB) has been reported as an interesting feedstock for many industries, including biodiesel production. The A. platensis by-product of biodiesel production (lipid-free biomass; LFB) is a source of proteins, functional molecules, and carbohydrates, and can also be reused in several applications. The current study investigated the efficiency of ACDB and LFB in bioremediation of dye (Ismate violet 2R, IV2R) from textile effluents. In addition, the potential of ACDB and LFB loaded by IV2R as a feed for Rotifer, Brachionus plicatilis, was examined. The surface of the adsorbents was characterized by SEM, FTIR, and Raman analysis to understand the adsorption mechanism. The batch sorption method was examined as a function of adsorbent dose (0.02–0.01 g L−1), solution initial concentration (10–100 mg L−1), pH (2–10), and contact time (15–180 min). The kinetic studies and adsorption isotherm models (Freundlich, Langmuir, Tempkin, and Halsey) were used to describe the interaction between dye and adsorbents. The results concluded that the adsorption process increased with increasing ACDB and LFB dose, contact time (120 min), initial IV2R concentration (10 mg L−1), and acidity pH (2 and 6, respectively). For the elimination of industrial textile wastewater, the ACDB and LFB sorbents have good elimination ability of a dye solution by 75.7% and 61.11%, respectively. The kinetic interaction between dye and adsorbents fitted well to Langmuir, Freundlish, and Halsey models for LFB, and Langmuir for ACDB at optimum conditions with R2 > 0.9. In addition, based on the bioassay study, the ACDB and LFB loaded by IV2R up to 0.02 g L−1 may be used as feed for the marine Rotifer B. plicatilis.
Ahmed Alprol; Ahmed Heneash; Mohamed Ashour; Khamael Abualnaja; Dalal Alhashmialameer; Abdallah Mansour; Zaki Sharawy; Mouhamed Abu-Saied; Abd Abomohra. Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis). Materials 2021, 14, 4446 .
AMA StyleAhmed Alprol, Ahmed Heneash, Mohamed Ashour, Khamael Abualnaja, Dalal Alhashmialameer, Abdallah Mansour, Zaki Sharawy, Mouhamed Abu-Saied, Abd Abomohra. Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis). Materials. 2021; 14 (16):4446.
Chicago/Turabian StyleAhmed Alprol; Ahmed Heneash; Mohamed Ashour; Khamael Abualnaja; Dalal Alhashmialameer; Abdallah Mansour; Zaki Sharawy; Mouhamed Abu-Saied; Abd Abomohra. 2021. "Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis)." Materials 14, no. 16: 4446.
The formulator of aquatic diets is part of a continuous search for alternative protein sources instead of depreciated fish meal. The utilization of zooplankton as a feed ingredient is an interesting trend due to their high-quality protein content and abundance of essential nutrients. The current study aims to investigate the effects of partial and total replacement of fish meal (FM) by Dahpnia magna meal (DMM) on growth performance, feed utilization, histological, and economic status of mullet, M. cephalus, larvae. In addition to the control diet, 100% FM, D0, four diets containing DMM at different levels were used: 25% (D25), 50% (D50), 75% (D75), and 100% (D100) replacement of fish meal. A total of 300 larvae (0.097 ± 0.001 g) were equally divided into five groups (three replicate per each group) at a density of 200 larvae m−3. The aquariums were renewed at a rate of 30% daily. During the 60-day experimental period, all larvae were fed their respective diets at a level of 20% of live body weight, five times a day (9.00 a.m., 12.00, 15.00, 18.00, and 21.00 p.m.). The results indicated that compared to D0, fish fed D75 recorded the highest significant value of growth, and feed utilization parameters, while fish fed D100 achieved the lowest feed cost and incidence cost, and the highest profit index and economic efficiency ratio. A strong correlation was reported among weight gain, feed conversion ratio and fish meal replacement with DMM; R2 = 0.94 and 0.91, respectively. The fit regression model representing mullet response to FM replacement with DMM is a poly-nominal regression model with maximum response at 75–100%. The histological investigation of the intestine revealed an improvement of histomorphometric indices and goblet cell number with increasing DMM inclusion levels. These findings confirmed that 75% to 100% partial substitution of FM with DMM is the ideal replacement for mullet, M. cephalus, larvae for improving fish growth performance and feed utilization.
Hamdy Abo-Taleb; Mohamed Ashour; Mohamed Elokaby; Mohamed Mabrouk; Mohamed El-Feky; Othman Abdelzaher; Ahmed Gaber; Walaa Alsanie; Abdallah Mansour. Effect of a New Feed Daphnia magna (Straus, 1820), as a Fish Meal Substitute on Growth, Feed Utilization, Histological Status, and Economic Revenue of Grey Mullet, Mugil cephalus (Linnaeus 1758). Sustainability 2021, 13, 7093 .
AMA StyleHamdy Abo-Taleb, Mohamed Ashour, Mohamed Elokaby, Mohamed Mabrouk, Mohamed El-Feky, Othman Abdelzaher, Ahmed Gaber, Walaa Alsanie, Abdallah Mansour. Effect of a New Feed Daphnia magna (Straus, 1820), as a Fish Meal Substitute on Growth, Feed Utilization, Histological Status, and Economic Revenue of Grey Mullet, Mugil cephalus (Linnaeus 1758). Sustainability. 2021; 13 (13):7093.
Chicago/Turabian StyleHamdy Abo-Taleb; Mohamed Ashour; Mohamed Elokaby; Mohamed Mabrouk; Mohamed El-Feky; Othman Abdelzaher; Ahmed Gaber; Walaa Alsanie; Abdallah Mansour. 2021. "Effect of a New Feed Daphnia magna (Straus, 1820), as a Fish Meal Substitute on Growth, Feed Utilization, Histological Status, and Economic Revenue of Grey Mullet, Mugil cephalus (Linnaeus 1758)." Sustainability 13, no. 13: 7093.
This paper presents an estimation of the adsorptive potential of multiwalled carbon nanotubes (MWCNTs) and modified poly (acrylonitrile-co-styrene) with activated carbon for the uptake of reactive red 35 (RR35) dye from aqueous solution by a batch system. MWCNT adsorbent was synthesized by encapsulation via in situ polymerization. The copolymer material of poly (acrylonitrile-styrene) P (AN-co-ST) was prepared in a ratio of 2:1 V/V by the precipitation polymerization process. The prepared composites’ properties were characterized by FTIR, SEM, Raman, mean particle size (PSA), and XRD analysis. The PSA of the copolymeric material was determined to be 450.5 and 994 nm for MWCNTs and P(AN-co-St)/AC, respectively. Moreover, the influences of different factors, for example pH (2–10), adsorbents dosage (0.005–0.04 g), contact time (5–120 min), initial dye concentration (10–50 mg L−1), and temperature (25–55 °C). The optimum values were determined to be 2 and 4 pH, 10 mg L−1 of RR35 dye, and 0.04 g of adsorbents at early contact time. Furthermore, the adsorption isotherm was studied using Langmuir, Freundlich, Tempkin, and Halsey models. Maximum capacity qmax for MWCNTS and P (AN-co-St)/AC was 256.41 and 30.30 mg g−1, respectively. The investigational kinetic study was appropriated well via a pseudo second-order model with a correlation coefficient around 0.99. Thermodynamic study displayed that the removal of RR35 is exothermic, a spontaneous and physisorption system. The adsorption efficiency reduced to around 54–55% of the RR35 after four cycles of reuse of the adsorbents at 120 min.
Khamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Mohamed Ashour; Abdallah Mansour. Removing of Anionic Dye from Aqueous Solutions by Adsorption Using of Multiwalled Carbon Nanotubes and Poly (Acrylonitrile-styrene) Impregnated with Activated Carbon. Sustainability 2021, 13, 7077 .
AMA StyleKhamael Abualnaja, Ahmed Alprol, M. Abu-Saied, Mohamed Ashour, Abdallah Mansour. Removing of Anionic Dye from Aqueous Solutions by Adsorption Using of Multiwalled Carbon Nanotubes and Poly (Acrylonitrile-styrene) Impregnated with Activated Carbon. Sustainability. 2021; 13 (13):7077.
Chicago/Turabian StyleKhamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Mohamed Ashour; Abdallah Mansour. 2021. "Removing of Anionic Dye from Aqueous Solutions by Adsorption Using of Multiwalled Carbon Nanotubes and Poly (Acrylonitrile-styrene) Impregnated with Activated Carbon." Sustainability 13, no. 13: 7077.
Burullus Lake is Egypt’s second most important coastal lagoon. The present study aimed to shed light on the different types of polluted waters entering the lake from various drains, as well as to evaluate the zooplankton community, determine the physical and chemical characteristics of the waters, and study the eutrophication state based on three years of seasonal monitoring from 2017 to 2019 at 12 stations. The results revealed that Rotifera, Copepoda, Protozoa, and Cladocera dominated the zooplankton population across the three-year study period, with a total of 98 taxa from 59 genera and 10 groups detected in the whole-body lake in 2018 and 2019, compared to 93 species from 52 genera in 2017. Twelve representative surface water samples were collected from the lake to determine physicochemical parameters, i.e., temperature, pH, salinity, dissolved oxygen, biological oxygen demand, chemical oxygen demand, ammonia-N, nitrate–N, nitrate-N, total nitrogen, total phosphorus, dissolved reactive phosphorus, and chlorophyll-a, as well as Fe, Cu, Zn, Cr, Ni, Cd, and Pb ions. Based on the calculations of the water quality index (WQI), the lake was classified as having good water quality. However, the trophic state is ranked as hyper-eutrophic and high trophic conditions.
Ahmed Alprol; Ahmed Heneash; Asgad Soliman; Mohamed Ashour; Walaa Alsanie; Ahmed Gaber; Abdallah Mansour. Assessment of Water Quality, Eutrophication, and Zooplankton Community in Lake Burullus, Egypt. Diversity 2021, 13, 268 .
AMA StyleAhmed Alprol, Ahmed Heneash, Asgad Soliman, Mohamed Ashour, Walaa Alsanie, Ahmed Gaber, Abdallah Mansour. Assessment of Water Quality, Eutrophication, and Zooplankton Community in Lake Burullus, Egypt. Diversity. 2021; 13 (6):268.
Chicago/Turabian StyleAhmed Alprol; Ahmed Heneash; Asgad Soliman; Mohamed Ashour; Walaa Alsanie; Ahmed Gaber; Abdallah Mansour. 2021. "Assessment of Water Quality, Eutrophication, and Zooplankton Community in Lake Burullus, Egypt." Diversity 13, no. 6: 268.
Cultivation of species of high growth rates is a key achievement of sustainable aquaculture development, with the aim of increasing animal protein per capita, maintaining food security and preserving freshwater usage. The present study was conducted to evaluate the feasibility of monoculture and polyculture of striped catfish, Pangasianodon hypophthalmus, and Nile tilapia, Oreochromis niloticus, in different proportions and their effect on growth performance, survival, productivity, feed utilization, body composition, and financial revenue. Five experimental treatments were designed as follows: monoculture of striped catfish (100%), Nile tilapia (100%) and polyculture in different proportions of striped catfish and Nile tilapia (25%:75%; 50%:50%; 75%:25%, respectively), each in three replicates. The fish feeding regime consisted of isonitrogenous (307.80 g kg−1) and isocaloric (19.27 kJ g−1) diets for 14 weeks. The results revealed that the highest growth performance, feed utilization, survival of striped catfish were obtained in monoculture, followed by polyculture of striped catfish and Nile tilapia (in low proportions) (75%:25%). The total production per m3 reached 5.41 kg m−3 in the monoculture of striped catfish, this production decreased in polyculture by 52%, 46% and 23% with 25%; 50%; 75% of striped catfish. The gross margin significantly increased, in case of striped catfish farmed in monoculture, compared to other polyculture proportions. While the gross margin per m−3 of water was 6, 0.5, 1 and 3 $ in monoculture and different polyculture proportions, respectively. Moreover, the feed cost per kilogram of protein gain significantly decreased in the monoculture of striped catfish compared to other polyculture treatments. The growth performance and survival of tilapia showed no significant difference among different treatments. In addition, the proximate chemical composition did not differ in respect to species in different studied treatments. Monoculture of striped catfish is recommended to achieve high production and improve financial revenue per water unit (m−3), for better sustainable development of aquaculture.
Abdallah Mansour; Belal Allam; Tarek Srour; Eglal Omar; Abdel Nour; Hala Khalil. The Feasibility of Monoculture and Polyculture of Striped Catfish and Nile Tilapia in Different Proportions and Their Effects on Growth Performance, Productivity, and Financial Revenue. Journal of Marine Science and Engineering 2021, 9, 586 .
AMA StyleAbdallah Mansour, Belal Allam, Tarek Srour, Eglal Omar, Abdel Nour, Hala Khalil. The Feasibility of Monoculture and Polyculture of Striped Catfish and Nile Tilapia in Different Proportions and Their Effects on Growth Performance, Productivity, and Financial Revenue. Journal of Marine Science and Engineering. 2021; 9 (6):586.
Chicago/Turabian StyleAbdallah Mansour; Belal Allam; Tarek Srour; Eglal Omar; Abdel Nour; Hala Khalil. 2021. "The Feasibility of Monoculture and Polyculture of Striped Catfish and Nile Tilapia in Different Proportions and Their Effects on Growth Performance, Productivity, and Financial Revenue." Journal of Marine Science and Engineering 9, no. 6: 586.
In this study, a multi-walled carbon nanotube (MWCNT) was synthesized and used as an adsorbent for the removal of Ismate violet 2R dye from contaminated water. The morphology and structure of the synthesized adsorbent were examined via the Brunauer–Emmett–Teller (BET) surface area, X-ray powder diffraction (XRD) analysis, infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and Raman spectroscopy. The effects of an MWCNT on the removal of IV2R were examined via a batch method using different factors such as pH, agitation time, adsorbent dosage, temperature, and initial dye concentration. The results showed that, at the acidic pH 4, 0.08 g of an MWCNT with 10 mg L−1 at 120 min realized the favorable removal of IV2R dye using an MWCNT. Under these operation conditions, the maximum elimination efficiency for real wastewater reached 88.2%. This process benefits from the ability to remove a large amount of dye (approximately 85.9%) in as short as 10 min using 0.005 g of MWCNTs. Moreover, the investigational isotherm data were examined by different models. The equations of error functions were used in the isotherm model to show the most appropriate isotherm model. The highest adsorption capacity for the removal of the dye was 76.92 mg g−1 for the MWCNT. Moreover, the regression data indicated that the adsorption kinetics were appropriate with a pseudo-second order and an R2 of 0.999. The thermodynamic study showed that the removal of IV2R is an endothermic, spontaneous, and chemisorption process. The MWCNT compound appears to be a new, promising adsorbent in water treatment, with 91.71% regeneration after three cycles.
Khamael Abualnaja; Ahmed Alprol; Mohamed Ashour; Abdallah Mansour. Influencing Multi-Walled Carbon Nanotubes for the Removal of Ismate Violet 2R Dye from Wastewater: Isotherm, Kinetics, and Thermodynamic Studies. Applied Sciences 2021, 11, 4786 .
AMA StyleKhamael Abualnaja, Ahmed Alprol, Mohamed Ashour, Abdallah Mansour. Influencing Multi-Walled Carbon Nanotubes for the Removal of Ismate Violet 2R Dye from Wastewater: Isotherm, Kinetics, and Thermodynamic Studies. Applied Sciences. 2021; 11 (11):4786.
Chicago/Turabian StyleKhamael Abualnaja; Ahmed Alprol; Mohamed Ashour; Abdallah Mansour. 2021. "Influencing Multi-Walled Carbon Nanotubes for the Removal of Ismate Violet 2R Dye from Wastewater: Isotherm, Kinetics, and Thermodynamic Studies." Applied Sciences 11, no. 11: 4786.
Bioactive molecules derived from seaweed extracts are revolutionary bio-stimulants used to enhance plant growth and increase yield production. This study evaluated the effectiveness of a commercially available seaweed liquid extract, namely, True-Algae-Max (TAM®), as a plant growth stimulant on nutritional, and antioxidant activity of Capsicum annuum. Three concentrations of TAM® (0.25, 0.5, and 1%) of various NPK: TAM® ratios were investigated via foliar spray, over 2017 and 2018 cultivation seasons, under greenhouse conditions. TAM® is rich in phytochemical compounds, such as ascorbic acid (1.66 mg g−1), phenolics (101.67 mg g−1), and flavonoids (2.60 mg g−1) that showed good antioxidant activity (54.52 mg g−1) and DPPH inhibition of 70.33%. Promoting measured parameter results stated the extensive potentiality of TAM® application, in comparison with conventional NPK treatment. Yield and composition of C. annuum were significantly improved in all TAM® treated groups, especially the TAM0.5% concentration, which resulted in maximum yield (4.23 Kg m−2) and significant amounts of profuse biological molecules like chlorophyll, ascorbic, phenolic compounds, flavonoids, and total nutrients. Compared to the NPK control treatments, C. annuum treated with TAM0.5% improved the total antioxidant activity of hot Pepper from 162.16 to 190.95 mg g−1. These findings indicate that the extract of seaweed can be used as an environmentally friendly, multi-functional biostimulant in the agricultural field for more sustainable production, in addition to reducing the use of hazardous synthetic fertilizers.
Mohamed Ashour; Shimaa Hassan; Mostafa Elshobary; Gamal Ammar; Ahmed Gaber; Walaa Alsanie; Abdallah Mansour; Rania El-Shenody. Impact of Commercial Seaweed Liquid Extract (TAM®) Biostimulant and Its Bioactive Molecules on Growth and Antioxidant Activities of Hot Pepper (Capsicum annuum). Plants 2021, 10, 1045 .
AMA StyleMohamed Ashour, Shimaa Hassan, Mostafa Elshobary, Gamal Ammar, Ahmed Gaber, Walaa Alsanie, Abdallah Mansour, Rania El-Shenody. Impact of Commercial Seaweed Liquid Extract (TAM®) Biostimulant and Its Bioactive Molecules on Growth and Antioxidant Activities of Hot Pepper (Capsicum annuum). Plants. 2021; 10 (6):1045.
Chicago/Turabian StyleMohamed Ashour; Shimaa Hassan; Mostafa Elshobary; Gamal Ammar; Ahmed Gaber; Walaa Alsanie; Abdallah Mansour; Rania El-Shenody. 2021. "Impact of Commercial Seaweed Liquid Extract (TAM®) Biostimulant and Its Bioactive Molecules on Growth and Antioxidant Activities of Hot Pepper (Capsicum annuum)." Plants 10, no. 6: 1045.
Copepods are one of the most abundant and diverse live food sources for mesopelagic and bathypelagic fishes and crustaceans. They could contribute to the overlap of the transition period from live feed to an artificial weaning diet in marine larvae production. However, the culture conditions still need optimization to provide sufficient production to cover the increasing demand for marine hatcheries. Therefore, the present study investigated the effects of different salinity levels (5, 10, 15, 20, 25, and 30 ppt) on the population growth, growth rate, and population composition (males, females, copepodite, and nauplii ratio) of the marine copepod, Oithona nana. The experiment continued for 15 days, under laboratory-controlled conditions of temperature (27 ± 1 °C), pH (7.7 ± 0.15), and continuous gentle aeration in 30 L glass aquaria. The copepod culture aquaria were supplemented with a mixture of soybean and yeast (0.5 g 10−6 individual−1 24-h−1) as a feed source. The highest significant population growth and population growth rate of O. nana were achieved with a salinity level of 20 ppt. Regarding population composition, O. nana cultured at the salinity level of 20 ppt recorded the highest significant percentages of copepodite and nauplii. The results concluded that copepod, O. nana, is capable of withstanding abrupt changes in the salinity, but there are limits to their tolerance, with an optimal salinity level of 20 ppt. This salinity level achieved the highest population growth and the highest percentages of copepodite and nauplii of marine Copepoda, O. nana.
Fawzy Magouz; Mohamed Essa; Mustafa Matter; Abdallah Mansour; Ahmed Gaber; Mohamed Ashour. Effect of Different Salinity Levels on Population Dynamics and Growth of the Cyclopoid Copepod Oithona nana. Diversity 2021, 13, 190 .
AMA StyleFawzy Magouz, Mohamed Essa, Mustafa Matter, Abdallah Mansour, Ahmed Gaber, Mohamed Ashour. Effect of Different Salinity Levels on Population Dynamics and Growth of the Cyclopoid Copepod Oithona nana. Diversity. 2021; 13 (5):190.
Chicago/Turabian StyleFawzy Magouz; Mohamed Essa; Mustafa Matter; Abdallah Mansour; Ahmed Gaber; Mohamed Ashour. 2021. "Effect of Different Salinity Levels on Population Dynamics and Growth of the Cyclopoid Copepod Oithona nana." Diversity 13, no. 5: 190.
In this study, a polymeric (acrylonitrile-co-styrene) P(AN-co-St) composite was impregnated with adsorbents, such as sulfonated and multiwall carbon nanotubes (MWCNTs), to increase the adsorptive characteristics of the nanocomposite upon the removal of methyl orange (MO) dye under different conditions. A novel nanocomposite copolymer mixture of P(AN-co-St) and SP(AN-co-St) was used. MWCNTs were prepared by a low-cost chemical vapor deposition (CVD) process. Variation in MO adsorption onto the three nanocomposites was examined in an aqueous solution via the batch technique with respect to contact time, initial MO concentration, adsorbent dosage, pH, and temperature. The surface of the nanocomposites was characterized by a scanning electron microscope (SEM), particle size distribution (PSD), Fourier transform infrared (FTIR), and Raman analysis. The experimental data showed that the efficiency of P(AN-co-St)/ MWCNT removal increased under the conditions of an acidic pH (3 and 5) with an agitation speed of 140 rpm, a sorbent weight of 0.01 g, and 20 mg of initial dye. The maximum sorption capacities were 121.95, 48.78, and 47.84 mg g−1 for the P(AN-co-St)/ MWCNTs, SP(AN-co-St), and P(AN-co-St) composites, respectively, as assessed by the Langmuir model. Additional isotherm models, such as the Freundlich, Temkin, and Halsey models, were used to examine the experimental data. A pseudo-second-order model was found to be more fitting for describing the sorption.
Khamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Abdallah Mansour; Mohamed Ashour. Studying the Adsorptive Behavior of Poly(Acrylonitrile-co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye. Nanomaterials 2021, 11, 1144 .
AMA StyleKhamael Abualnaja, Ahmed Alprol, M. Abu-Saied, Abdallah Mansour, Mohamed Ashour. Studying the Adsorptive Behavior of Poly(Acrylonitrile-co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye. Nanomaterials. 2021; 11 (5):1144.
Chicago/Turabian StyleKhamael Abualnaja; Ahmed Alprol; M. Abu-Saied; Abdallah Mansour; Mohamed Ashour. 2021. "Studying the Adsorptive Behavior of Poly(Acrylonitrile-co-Styrene) and Carbon Nanotubes (Nanocomposites) Impregnated with Adsorbent Materials towards Methyl Orange Dye." Nanomaterials 11, no. 5: 1144.
The marine copepod species Oithona nana is considered as one of the most successfully mass cultured Cyclopoida species in marine hatcheries. This study investigated the effects of four feed diets (soybean, yeast, rice bran, and corn starch) on the population growth, growth rate, population composition, fecundity, and fatty acid composition of native isolated Cyclopoida copepod species O. nana. The experiment was continued for 15 days and the copepods were fed on one of the four diets with a concentration of 1 g 10−6 individual day−1. The results revealed that corn starch was found to be the most supportive diet for population growth and population growth rate. For nutritional value, copepods fed on rice bran were detected to have the highest content of MUFA, PUFA, and the lowest SFA and SFA/UFA ratio; more importantly, the rice bran diet was the only treatment that showed C20:5ω3. Moreover, copepods fed on rice bran showed the highest significant female fecundity, copepodite, and nauplii percent. Finally, the protocols described in the current study concluded that the dry feeds, especially corn starch, are very useful and applicable in hatcheries for maximizing the fecundity and density of Cyclopoida copepod species, O. nana.
Fawzy Magouz; Mohamed Essa; Mustafa Matter; Abdallah Tageldein Mansour; Mohamed Alkafafy; Mohamed Ashour. Population Dynamics, Fecundity and Fatty Acid Composition of Oithona nana (Cyclopoida, Copepoda), Fed on Different Diets. Animals 2021, 11, 1188 .
AMA StyleFawzy Magouz, Mohamed Essa, Mustafa Matter, Abdallah Tageldein Mansour, Mohamed Alkafafy, Mohamed Ashour. Population Dynamics, Fecundity and Fatty Acid Composition of Oithona nana (Cyclopoida, Copepoda), Fed on Different Diets. Animals. 2021; 11 (5):1188.
Chicago/Turabian StyleFawzy Magouz; Mohamed Essa; Mustafa Matter; Abdallah Tageldein Mansour; Mohamed Alkafafy; Mohamed Ashour. 2021. "Population Dynamics, Fecundity and Fatty Acid Composition of Oithona nana (Cyclopoida, Copepoda), Fed on Different Diets." Animals 11, no. 5: 1188.
To achieve strong, successful and commercial aqua-biotechnological microalgae applications, screening, isolation, molecular identification, and physiological characterizations are needed. In the current study, a native cyanobacteria strain Arthrospira platensis NIOF17/003 was isolated from the surface water of El-Khadra Lake, a saline-alkaline lake located in Wadi El-Natrun, Egypt. The cyanobacterium was phylogenetically identified by 16S rRNA molecular marker and deposited in the GenBank database (accession number MW396472). The late exponential phase of A. platensis NIOF17/003 was reached at the 8th day of growth using Zarrouk medium, with a recorded dry weight (DW) of 0.845 g L−1. The isolated strain showed 52% of protein, 14% of carbohydrate, biomass productivity of 143.83 mg L−1 day−1, 8.5% of lipid, and lipid productivity of 14.37 mg L−1 day−1. In general, the values of cetane number, iodine value, cold filter plugging point (52.9, 85.5 g I2/100 g oil, and −2.2 °C, respectively) of the isolated fatty acid methyl esters are in accordance with those suggested by international standards. Besides, applying algal-free lipid (FL) as biodiesel byproduct in the production of rotifer (Brachionus plicatilis) revealed that a 0.6 g L−1 FL significantly increased the rotifer population females carrying eggs, confirming that FL can be used efficiently for B. plicatilis production. The current study concluded that the new isolate A. platensis NIOF17/003 is a promising strain for double sustainable use in biodiesel production and aquaculture feed.
Mohamed Zaki; Mohamed Ashour; Ahmed Heneash; Mohamed Mabrouk; Ahmed Alprol; Hanan Khairy; Abdelaziz Nour; Abdallah Mansour; Hesham Hassanien; Ahmed Gaber; Mostafa Elshobary. Potential Applications of Native Cyanobacterium Isolate (Arthrospira platensis NIOF17/003) for Biodiesel Production and Utilization of Its Byproduct in Marine Rotifer (Brachionus plicatilis) Production. Sustainability 2021, 13, 1769 .
AMA StyleMohamed Zaki, Mohamed Ashour, Ahmed Heneash, Mohamed Mabrouk, Ahmed Alprol, Hanan Khairy, Abdelaziz Nour, Abdallah Mansour, Hesham Hassanien, Ahmed Gaber, Mostafa Elshobary. Potential Applications of Native Cyanobacterium Isolate (Arthrospira platensis NIOF17/003) for Biodiesel Production and Utilization of Its Byproduct in Marine Rotifer (Brachionus plicatilis) Production. Sustainability. 2021; 13 (4):1769.
Chicago/Turabian StyleMohamed Zaki; Mohamed Ashour; Ahmed Heneash; Mohamed Mabrouk; Ahmed Alprol; Hanan Khairy; Abdelaziz Nour; Abdallah Mansour; Hesham Hassanien; Ahmed Gaber; Mostafa Elshobary. 2021. "Potential Applications of Native Cyanobacterium Isolate (Arthrospira platensis NIOF17/003) for Biodiesel Production and Utilization of Its Byproduct in Marine Rotifer (Brachionus plicatilis) Production." Sustainability 13, no. 4: 1769.
Essential oils (EOs) and their active components are attracting a lot of attention as sustainable feed additives due to their known antimicrobial properties against a variety of microorganisms, including bacteria, protozoa, and fungi. They also have biological therapeutic, antioxidant, and flavor properties. They can be used for modifying the rumen environment and improving animal productivity. The present study was designed to investigate the effect of supplementation with 2.5 and 5 g/head/day of an essential oils blend (EOB) of clove, oregano, and juniper in equal proportions on milk production and quality, and physiological status of early lactating Holstein dairy cows for 8 weeks of treatment followed by 8 weeks of posttreatment. The results revealed an improvement in milk yield (p ≤ 0.02) and feed efficiency (p ≤ 0.001) with EOB at a dose of 2.5 g/head/day. The percentages of milk protein and lactose were increased (p ≤ 0.03) with a high dose of EOB inclusion during the treatment period as compared with the control group. Milk fat percentage, fat-corrected milk, and energy-corrected milk were not significantly affected by EOB supplementation. The supplementation of EOB tended to decrease milk total bacterial and somatic cell counts when compared to the control group. The supplementation of EOB at both doses increased serum total protein (p ≤ 0.02) and globulin (p ≤ 0.05), and decreased cholesterol level (p ≤ 0.001) and creatinine (p ≤ 0.001) as compared to the control group. Furthermore, the results show that the low dose of EOB had more desirable effects on milk yield, milk total bacterial count, milk somatic cell count, and feed efficiency than the high dose, suggesting that lower doses may not inhibit rumen microbial populations. Moreover, the low doses of EOB could be used as sustainable natural alternatives to antibiotics in livestock diets.
Shaker Al-Suwaiegh; Sabrin Morshedy; Abdallah Mansour; Mohamed Ahmed; Soliman Zahran; Tareq Alnemr; Sobhy Sallam. Effect of an Essential Oil Blend on Dairy Cow Performance during Treatment and Post-Treatment Periods. Sustainability 2020, 12, 9123 .
AMA StyleShaker Al-Suwaiegh, Sabrin Morshedy, Abdallah Mansour, Mohamed Ahmed, Soliman Zahran, Tareq Alnemr, Sobhy Sallam. Effect of an Essential Oil Blend on Dairy Cow Performance during Treatment and Post-Treatment Periods. Sustainability. 2020; 12 (21):9123.
Chicago/Turabian StyleShaker Al-Suwaiegh; Sabrin Morshedy; Abdallah Mansour; Mohamed Ahmed; Soliman Zahran; Tareq Alnemr; Sobhy Sallam. 2020. "Effect of an Essential Oil Blend on Dairy Cow Performance during Treatment and Post-Treatment Periods." Sustainability 12, no. 21: 9123.
A 60-day feeding trial was conducted to assess the effects of dietary supplementation with bile salts (BS), lutein (LTN), and their combination on growth, survival, carotenoid content, and antioxidant status of rabbitfish (Siganus rivulatus) larvae. Fish were fed four isonitrogenous (34.39% protein) and isoenergetic (20.57 kJ/g) diets supplemented with BS (0.15 g kg−1), LTN (0.1 g kg−1), BS+LTN (0.15 and 0.1 g kg−1, respectively), and a non-supplemented control diet. The results revealed that fish fed BS+LTN had the highest significant specific growth rate (4.37% day−1), feed efficiency (46.55%), and survival (97.78%). Lutein supplementation improved whole-body protein content, meanwhile, fish fed a BS-supplemented diet had a higher lipid content. The carotenoid deposition was significantly increased with LTN and BS+LTN in skin, muscle, and whole body compared to the control and BS treatment. All dietary supplementation of BS and LTN showed significant improvement in total antioxidant capacity, catalase, and glutathione peroxidase activities. Additionally, LTN alone or BS+LTN significantly reduced malondialdehyde levels by 5.30 and 29.91%, respectively compared to the control. BS supplementation modulated aminopeptidases activities, triglycerides, cholesterol, and increased the activity of pancreatic lipase. Therefore, it could be inferred that dietary supplementation with LTN in combination with BS could improve the growth performance, carotenoid deposition, antioxidant status, lipid digestion, and metabolism of S. rivulatus.
Abdallah Mansour; Mohamed El-Feky; Hossam El-Beltagi; Ahmed Sallam. Synergism of Dietary Co-Supplementation with Lutein and Bile Salts Improved the Growth Performance, Carotenoid Content, Antioxidant Capacity, Lipid Metabolism, and Lipase Activity of the Marbled Spinefoot Rabbitfish, Siganus rivulatus. Animals 2020, 10, 1643 .
AMA StyleAbdallah Mansour, Mohamed El-Feky, Hossam El-Beltagi, Ahmed Sallam. Synergism of Dietary Co-Supplementation with Lutein and Bile Salts Improved the Growth Performance, Carotenoid Content, Antioxidant Capacity, Lipid Metabolism, and Lipase Activity of the Marbled Spinefoot Rabbitfish, Siganus rivulatus. Animals. 2020; 10 (9):1643.
Chicago/Turabian StyleAbdallah Mansour; Mohamed El-Feky; Hossam El-Beltagi; Ahmed Sallam. 2020. "Synergism of Dietary Co-Supplementation with Lutein and Bile Salts Improved the Growth Performance, Carotenoid Content, Antioxidant Capacity, Lipid Metabolism, and Lipase Activity of the Marbled Spinefoot Rabbitfish, Siganus rivulatus." Animals 10, no. 9: 1643.
The present study aimed to investigate the effects of dietary supplementation of different Zn sources on growth performance, anti-oxidative status, immune response, and ammonia stress resistance of marbled spinefoot rabbitfish, S. rivulatus. The fish were fed four experimental diets in triplicate per treatment−1 for eight weeks. The first diet was control (without Zn supplementation), the other three treatments included supplementation with 30 mg kg−1 zinc oxide (ZnO), Zn-Methionine (Zn-Met), and ZnO-nanoparticles (ZnO-NPs). The results revealed a significant improvement in growth performance and protein utilization with Zn-Met and ZnO-NPs supplemented treatments compared to the control and ZnO groups. There was a significant decrease in malondialdehyde content, and a significant increase in catalase, superoxide dismutase and glutathione peroxidase in all Zn supplemented groups. The lysozyme and phenoloxidase activities improved significantly with both ZnO-NPs and Zn-Met. Also, the electrophoretic investigation coupled with cluster analysis showed different distribution patterns of protein bands among treatments and the highest similarity was seen with ZnO and ZnO-NPs. The tolerance of S. rivulatus against an ammonia challenge was increased with Zn-Met and ZnO-NPs supplementation. In conclusion, supplementation with Zn-Met and ZnO-NPs is better than ZnO for improving growth performance, the anti-oxidative status and innate immune response of rabbitfish, S. rivulatus.
Ahmed Elsayed Sallam; Abdallah Tageldein Mansour; Ahmed Saud Alsaqufi; Mohamed El-Sayed Salem; Mohamed M M El-Feky. Growth performance, anti-oxidative status, innate immunity, and ammonia stress resistance of Siganus rivulatus fed diet supplemented with zinc and zinc nanoparticles. Aquaculture Reports 2020, 18, 100410 .
AMA StyleAhmed Elsayed Sallam, Abdallah Tageldein Mansour, Ahmed Saud Alsaqufi, Mohamed El-Sayed Salem, Mohamed M M El-Feky. Growth performance, anti-oxidative status, innate immunity, and ammonia stress resistance of Siganus rivulatus fed diet supplemented with zinc and zinc nanoparticles. Aquaculture Reports. 2020; 18 ():100410.
Chicago/Turabian StyleAhmed Elsayed Sallam; Abdallah Tageldein Mansour; Ahmed Saud Alsaqufi; Mohamed El-Sayed Salem; Mohamed M M El-Feky. 2020. "Growth performance, anti-oxidative status, innate immunity, and ammonia stress resistance of Siganus rivulatus fed diet supplemented with zinc and zinc nanoparticles." Aquaculture Reports 18, no. : 100410.
The effects of palaemon and artemia dried biomass dietary supplementation were studied on European Sea bass, Dicentrarchus labrax, broodstock egg quality, reproductive performance, sexual hormones and plasma proteins, lipids levels and lysozyme activity. The broodstock (1.36 ± 0.06 kg female−1 and 1.01 ± 0.11 kg male−1) were fed on three experimental diets as follows: basal diet (BD), palaemon-supplemented diet (PSD; 7.5 %) and artemia-supplemented diet (ASD; 2.5 %) for six weeks, besides one meal day−1 of sardine for all treatments. Then, the fish were subjected to hormonal-induced spawning with LHRHa to assure maturation and synchronous ovulation. The results revealed a significant (P < 0.05) increment in egg diameter by 15.3 and 9.6 % and oil droplet size by 9.87 and 5.09 % in broodstock fed on PSD and ASD supplemented diets, respectively, than the control group. Meanwhile, feeding on PSD and ASD significantly reduced the percentage of eggs with multi-oil droplet and non-viable eggs. The relative fecundity of PSD and ASD groups was increased by 7.53 and 20.02 % than the fish fed the BD. There were significant (P < 0.05) improvements in fertilization percentage, hatching percentage and reproductive hormones of broodstock fed the crustacean supplemented diets compared to the control. Therefore, palaemon and artemia dried biomass supplementation in the diets of D. labrax broodstock is recommended for improving reproductive performance and egg quality of sea bass, D. labrax.
Mona M. El-Gamal; Sarah I. Othman; Mohamed M. Abdel-Rahim; Abdallah Tageldein Mansour; Ahmed Saud Alsaqufi; Mohamed M. El Atafy; Mohamed H. Mona; Ahmed A. Allam. Palaemon and artemia supplemented diet enhances sea bass, Dicentrarchus labrax, broodstock reproductive performance and egg quality. Aquaculture Reports 2020, 16, 100290 .
AMA StyleMona M. El-Gamal, Sarah I. Othman, Mohamed M. Abdel-Rahim, Abdallah Tageldein Mansour, Ahmed Saud Alsaqufi, Mohamed M. El Atafy, Mohamed H. Mona, Ahmed A. Allam. Palaemon and artemia supplemented diet enhances sea bass, Dicentrarchus labrax, broodstock reproductive performance and egg quality. Aquaculture Reports. 2020; 16 ():100290.
Chicago/Turabian StyleMona M. El-Gamal; Sarah I. Othman; Mohamed M. Abdel-Rahim; Abdallah Tageldein Mansour; Ahmed Saud Alsaqufi; Mohamed M. El Atafy; Mohamed H. Mona; Ahmed A. Allam. 2020. "Palaemon and artemia supplemented diet enhances sea bass, Dicentrarchus labrax, broodstock reproductive performance and egg quality." Aquaculture Reports 16, no. : 100290.
In aquatic animals, the mucosal barrier is the first line of innate immune defence against external chemicals and pathogens. In this study, the effects of dietary Moringa oleifera leaf (MOL) supplementation on skin and gill mucosal immunity, antioxidants and stress responses were evaluated in seabream (Sparus aurata) fingerlings exposed to hydrogen peroxide (H2O2). A total of 144 specimens (10.11 ± 0.41 g) were divided into four treatments (three replicates per treatment contained 12 specimens each) and fed a non-supplemented control diet or a 1, 2.5 or 5% MOL-supplemented diet. After three weeks of feeding, six specimens from each aquarium were sampled for blood, mucus and tissues. The other six fish in each aquarium were subjected to H2O2 exposure. The results revealed that MOL did not negatively affect either cortisol or glucose levels. MOL supplementation significantly (P < 0.05) improved skin mucosal immunity-related characteristics, including phosphatase, peroxidase and lysozyme activity and IgM levels. Additionally, MOL upregulated the expression of antioxidant genes (sod and cat), an anti-inflammatory gene (tgf-β), tight junction protein genes (occludin and zo-1), c3, and igm in both the skin and gills. However, H2O2 exposure significantly (P < 0.05) increased both cortisol and glucose levels and disrupted skin mucosal immune function by significantly (P < 0.05) decreasing phosphatase, peroxidase, protease, antiprotease and lysozyme activity and IgM levels. H2O2 exposure severely decreased the mRNA levels of the studied genes. MOL dietary supplementation at the 5% level successfully attenuated the negative effects of H2O2 on the mucosal immune response in both the skin and gills. In conclusion, dietary MOL supplementation at the 5% level is recommended to improve S. aurata mucosal immune function under both normal and stress conditions. Additionally, exposure to H2O2 disrupts the mucosal immunity of fish. This contributes knowledge on the routes involved in mucosal innate immunity and could help to understand the fish resistance against chemicals exposure. Graphical abstract
Abdallah Tageldein Mansour; Cristóbal Espinosa; Jose María García-Beltrán; Liang Miao; Diana C. Ceballos Francisco; Ahmed Saud Alsaqufi; M. Ángeles Esteban. Dietary supplementation of drumstick tree, Moringa oleifera, improves mucosal immune response in skin and gills of seabream, Sparus aurata, and attenuates the effect of hydrogen peroxide exposure. Fish Physiology and Biochemistry 2020, 46, 981 -996.
AMA StyleAbdallah Tageldein Mansour, Cristóbal Espinosa, Jose María García-Beltrán, Liang Miao, Diana C. Ceballos Francisco, Ahmed Saud Alsaqufi, M. Ángeles Esteban. Dietary supplementation of drumstick tree, Moringa oleifera, improves mucosal immune response in skin and gills of seabream, Sparus aurata, and attenuates the effect of hydrogen peroxide exposure. Fish Physiology and Biochemistry. 2020; 46 (3):981-996.
Chicago/Turabian StyleAbdallah Tageldein Mansour; Cristóbal Espinosa; Jose María García-Beltrán; Liang Miao; Diana C. Ceballos Francisco; Ahmed Saud Alsaqufi; M. Ángeles Esteban. 2020. "Dietary supplementation of drumstick tree, Moringa oleifera, improves mucosal immune response in skin and gills of seabream, Sparus aurata, and attenuates the effect of hydrogen peroxide exposure." Fish Physiology and Biochemistry 46, no. 3: 981-996.
Modern aquaculture requires the reduction of the feeds cost, which can partly be achieved by minimal use of dietary animal protein. Therefore, this experiment assessing the nutritional potential of using high protein distillers dried grains (HP-DDG) in formulation of affordable striped catfish, Pangasianodon hypophthalmus, diet for more sustainable development of aquaculture. Four diets containing 0, 25, 50 and 75% HP-DDG as partial replacement of fish meal were fed to P. hypophthalmus (108.58 ± 0.17 g fish−1) reared in circular fibreglass tanks (1 m3 adjusted to 0.8 m3; three replicates treatment−1) at an intial stocking density of 30 fish tank−1. The experiment lasted 14 weeks. The results indicated a significant negative linear regression of growth response (SGR and FCR) with increasing fish meal replacement with HP-DDG according to these formula Y = -0.00444*X + 0.724 and Y = 0.00952*X + 1.583, respectively. The reduction of SGR was 16.44 and 32.88%, and the increasing of FCR was 13.66 and 21.74% by 25 and 50% HP-DDG replacement, respectively compared to the control. The whole-body protein content was significantly decreased and lipids increased with the highest HP-DDG inclusion level. The plasma proteins tended to decrease with increasing HP-DDG (%). Therefore, replacing 25% of fish meal by HP-DDG is acceptable for growth and feed utilization. However, the economic revenue indicated the visibility of replacing 50% of fish meal using HP-DDG as determined by feed cost kg−1 gain (Y = 0.0396*X + 12.84) and net income (Y = -0.2908*X + 47.02).
Belal Wagih Allam; Hala Saber Khalil; Abdallah Tageldein Mansour; Tarek Mohamed Srour; Eglal Ali Omar; Abdel Aziz Moussa Nour. Impact of substitution of fish meal by high protein distillers dried grains on growth performance, plasma protein and economic benefit of striped catfish (Pangasianodon hypophthalmus). Aquaculture 2019, 517, 734792 .
AMA StyleBelal Wagih Allam, Hala Saber Khalil, Abdallah Tageldein Mansour, Tarek Mohamed Srour, Eglal Ali Omar, Abdel Aziz Moussa Nour. Impact of substitution of fish meal by high protein distillers dried grains on growth performance, plasma protein and economic benefit of striped catfish (Pangasianodon hypophthalmus). Aquaculture. 2019; 517 ():734792.
Chicago/Turabian StyleBelal Wagih Allam; Hala Saber Khalil; Abdallah Tageldein Mansour; Tarek Mohamed Srour; Eglal Ali Omar; Abdel Aziz Moussa Nour. 2019. "Impact of substitution of fish meal by high protein distillers dried grains on growth performance, plasma protein and economic benefit of striped catfish (Pangasianodon hypophthalmus)." Aquaculture 517, no. : 734792.
High protein distiller's dried grains (HP‐DDG) are co‐products of ethanol production that uses prefractionation technology. An 8‐week growth trial was conducted to investigate the effect of partial replacement of soybean meal (SBM) by three levels of HP‐DDG (30%, 40% and 50%) on growth performance, physiological parameters and histological changes of the intestine of European sea bass, Dicentrarchus labrax. The results indicated that an increased dietary level of HP‐DDG of more than 30% significantly increases growth performance and improved the FCR of sea bass. In addition, replacement of SBM by HP‐DDG enhanced feed intake efficiency and the health status of fish. Haematology and serum biochemistry (haemoglobin (Hb), red blood cells (RBCs), white blood cells (WBCs), packed cell volume (PCV %) and humeral immune parameters including total protein, albumin, globulin, cholesterol, lysozyme activity and total antioxidant capacity significantly increased with increase HP‐DDG inclusion levels. The findings of this study indicated that HP‐DDG is a good complementary protein source for inclusion aquaculture diets and levels above 30% as a replacement of SBM did not compromise growth performance and physiological parameters of sea bass while enhancing some important indices of health status in this species.
Ashraf Goda; Tarek M. Srour; Eglal Omar; Abdallah Mansour; Mohamed Z. Baromh; Sherine A. Mohamed; Ehab El‐Haroun; Simon J. Davies. Appraisal of a high protein distiller’s dried grain (DDG) in diets for European sea bass,Dicentrarchus labraxfingerlings on growth performance, haematological status and related gut histology. Aquaculture Nutrition 2019, 25, 808 -816.
AMA StyleAshraf Goda, Tarek M. Srour, Eglal Omar, Abdallah Mansour, Mohamed Z. Baromh, Sherine A. Mohamed, Ehab El‐Haroun, Simon J. Davies. Appraisal of a high protein distiller’s dried grain (DDG) in diets for European sea bass,Dicentrarchus labraxfingerlings on growth performance, haematological status and related gut histology. Aquaculture Nutrition. 2019; 25 (4):808-816.
Chicago/Turabian StyleAshraf Goda; Tarek M. Srour; Eglal Omar; Abdallah Mansour; Mohamed Z. Baromh; Sherine A. Mohamed; Ehab El‐Haroun; Simon J. Davies. 2019. "Appraisal of a high protein distiller’s dried grain (DDG) in diets for European sea bass,Dicentrarchus labraxfingerlings on growth performance, haematological status and related gut histology." Aquaculture Nutrition 25, no. 4: 808-816.
Mohamed M. Abdel-Rahim; Abdallah Mansour; Mohamed H. Mona; Mona M. El-Gamal; Mohamed M. El Atafy. To what extent can maternal inherited immunity acquired from a crustacean-enhanced diet improve the performance and vitality of the offspring and enhance profitability of European Sea bass (Dicentrarchus labrax)? Journal of the World Aquaculture Society 2019, 50, 550 -574.
AMA StyleMohamed M. Abdel-Rahim, Abdallah Mansour, Mohamed H. Mona, Mona M. El-Gamal, Mohamed M. El Atafy. To what extent can maternal inherited immunity acquired from a crustacean-enhanced diet improve the performance and vitality of the offspring and enhance profitability of European Sea bass (Dicentrarchus labrax)? Journal of the World Aquaculture Society. 2019; 50 (3):550-574.
Chicago/Turabian StyleMohamed M. Abdel-Rahim; Abdallah Mansour; Mohamed H. Mona; Mona M. El-Gamal; Mohamed M. El Atafy. 2019. "To what extent can maternal inherited immunity acquired from a crustacean-enhanced diet improve the performance and vitality of the offspring and enhance profitability of European Sea bass (Dicentrarchus labrax)?" Journal of the World Aquaculture Society 50, no. 3: 550-574.
This study was conducted to determine the effects of selenium (Se)-yeast supplementation on the growth, survival, nutrient utilization, plasma lipid profile, economic benefit, and histological alterations of liver and intestine of meagre, Argyrosomus regius, fingerlings (3.20 ± 0.17 g). Four treatments (three replicates each in 100 × 40 × 30 cm aquaria) included a control group (not supplemented with Se) and three groups fed Se-supplemented diets at doses of 1, 2 and 3 mg Se-yeast kg−1 diet for nine weeks. The final estimated Se concentrations were 0.77, 1.51, 2.97 and 3.98 mg Se kg−1 diet. The results indicated that there is a significant polynomial 2nd order regression improvement in growth performance with a strong correlation coefficient with increasing dietary Se concentrations. The estimated curves beak of WG and SGR values ranged between 4.15 and 3.62 mg Se kg−1, respectively. The survival (%), feed intake, feed and nutrient utilization and whole-body protein content increased significantly with the highest two Se doses (2.97 and 3.98 mg Se kg−1 diet). There was a significant increase in muscle Se accumulation with dietary Se supplementation in a linear dose-dependent manner. The total lipids, cholesterol and low-density lipoprotein cholesterol decreased significantly with increasing dietary Se levels. Moreover, the liver histological investigation showed an improvement in liver histostructure and the absence of pathological signs at high Se levels. Intestinal sections revealed an increase in the area of absorption in the Se-yeast-supplemented groups. The economic evaluation of feed cost kg−1 gain and kg−1protein production decreased with increasing Se-yeast supplementation levels, reaching a 41.63 and 39.57% cost reduction, respectively, with a 3 mg Se-yeast supplementation kg−1 diet. Dietary Se at a dose of 3.98 mg Se kg−1 diet (3 mg Se-yeast) is recommended to improve growth performance, feed utilization, liver and kidney histology, and the economic benefit of meagre juveniles. Additionally, the estimated Se requirement of meagre is around 4 mg kg−1 diet according to the polynomial 2nd order regression.
Hala Saber Khalil; Abdallah Tageldein Mansour; Ashraf Goda; Eglal Ali Omar. Effect of selenium yeast supplementation on growth performance, feed utilization, lipid profile, liver and intestine histological changes, and economic benefit in meagre, Argyrosomus regius, fingerlings. Aquaculture 2018, 501, 135 -143.
AMA StyleHala Saber Khalil, Abdallah Tageldein Mansour, Ashraf Goda, Eglal Ali Omar. Effect of selenium yeast supplementation on growth performance, feed utilization, lipid profile, liver and intestine histological changes, and economic benefit in meagre, Argyrosomus regius, fingerlings. Aquaculture. 2018; 501 ():135-143.
Chicago/Turabian StyleHala Saber Khalil; Abdallah Tageldein Mansour; Ashraf Goda; Eglal Ali Omar. 2018. "Effect of selenium yeast supplementation on growth performance, feed utilization, lipid profile, liver and intestine histological changes, and economic benefit in meagre, Argyrosomus regius, fingerlings." Aquaculture 501, no. : 135-143.