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Mahmoud A.O. Dawood
Kafrelsheikh University
LysozymePagrus majorNile tilapiaBiologyImmune system
60Publications
20H-index
1,029Citations
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Publications 101
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#1Mahmoud A.O. Dawood (Kafrelsheikh University)H-Index: 20
#2Abd El-Salam Metwally (Kafrelsheikh University)
Last. Mervat A.M. Ali (Suez Canal University)H-Index: 1
view all 7 authors...
Abstract The use of food additives is an important preventive approach that has proven to maintain the health status of fish, especially under stressful conditions. The dietary ferulic acid (FA) was included in the diets at 0, 20, 40, 80, and 160 mg per kg to investigate its beneficiary aspects on Nile tilapia. After 60 days, fish were exposed to heat stress (HS), then blood and liver samples were collected. Before HS, the growth performance was linearly and quadratically affected by the inclusi...
2 CitationsSource
#1Radi A. Mohamed (Kafrelsheikh University)H-Index: 4
#2Zizy I. Elbialy (Kafrelsheikh University)H-Index: 3
Last. Hien Van Doan (CMU: Chiang Mai University)H-Index: 18
view all 11 authors...
Abstract The current study aimed to evaluate whether clenbuterol, a β2-adrenergic agonist, supplementation in Nile tilapia (Oreochromis niloticus) diets can influence growth and blood parameters. Besides, assessment of adipogenic genes as fatty acid synthase (FAS) and lipoprotein lipase (LPL) which is a key enzyme in the regulation of the flux of fatty acids in liver, muscle, and adipose tissue as well as muscle growth-regulating genes as myostatin (MYO) in muscle and insulin-like growth factor-...
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#1Mahmoud A.O. Dawood (Kafrelsheikh University)H-Index: 20
#2N. M. Eweedah (Kafrelsheikh University)H-Index: 2
Last. Hamada A. Ahmed (Damanhour University)H-Index: 1
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Abstract Varied levels of Saccharomyces cerevisiae-fermented date palm seed meal (DSM) were included in Nile tilapia (26.95 ± 0.01 g) diets. Five diets were prepared to include fermented DSM at 0, 5, 10, 15 and 20 % and fed for fish for 8 weeks. The obtained results revealed that yeast fermented DSM significantly affected the final body weight, weight gain, specific growth rate, and feed conversion ratio in a dose dependent manner (P = 0.001, P = 0.002, P = 0.004, P = 0.01, respectively). Dietar...
1 CitationsSource
#1Mahmoud A.O. Dawood (Kafrelsheikh University)H-Index: 20
#2N. M. Eweedah (Kafrelsheikh University)H-Index: 2
Last. Bilal Ahamad Paray (KSU: King Saud University)
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Abstract This study was aimed at evaluating the growth, hematology, immune-related genes, antioxidative status and resistance against heat stress (HS) in Nile tilapia fed diets with white button mushroom (WBM) at 0, 0.5, 1, 2, and 4% for 60 days. The final body weight, weight gain, specific growth rate, and feed intake were significantly increased quadratically by increasing the level of WBM in the tilapia diet (P
2 CitationsSource
#1Mahmoud A.O. Dawood (Kafrelsheikh University)H-Index: 20
#2Abd El-Salam Metwally (Kafrelsheikh University)
Last. Bilal Ahamad Paray (KSU: King Saud University)
view all 7 authors...
Abstract This study aimed to evaluate the growth, intestinal morphometry, immune-related genes, and heat shock protein in Nile tilapia (Oreochromis niloticus) reared at a rate of 10 (low density—LD, 200/m3), 20 (medium density—MD, 400/m3), and 30 (high density—HD, 600/m3) fish per aquarium (50 L). The fish were fed two diets [control and β-glucan (BG)] (2 × 3, factorial design) for 60 days. The growth parameters were significantly decreased by increasing the rearing density of Nile tilapia fed t...
2 CitationsSource
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#1Mahmoud A.O. Dawood (Kafrelsheikh University)H-Index: 20
#2Abd El-Salam Metwally (Kafrelsheikh University)
Last. Hany M. R. Abdel-Latif (Alexandria University)H-Index: 2
view all 11 authors...
Abstract Chlorpyrifos (CPF) is one of the predominant water pollutants associated with inflammation and immunodepression in aquatic animals. In this study, menthol oil (MNT) impacted the immunity, antioxidative, and anti-inflammatory responses against CPF toxicity in Nile tilapia. Fish fed two diets with or without MNT and placed in four groups (control, CPF, MNT, and CPF/MNT). After 30 days, fish fed MNT displayed higher growth performance and lower FCR than CPF-intoxicated fish without feeding...
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#1Mahmoud H. El-DeepH-Index: 3
#2Khairy A. Amber (Kafrelsheikh University)H-Index: 1
Last. Abdulrahman Zidan (Kafrelsheikh University)
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In ovo injection of nano-selenium (Se) produced by lactic acid bacteria (LAB-nano-Se) was investigated on the hatchability, immune responses and the histopathological alterations in hatched chicks. The eggs (18 day age) were injected with 0.5 ml of 0.9% NaCl (normal saline, NS), while the control group was kept without injection. In the third, fourth and fifth groups, the eggs were injected with 0.5 ml of NS and LAB-nano-Se at 10, 20 and 30 mug/egg. The results revealed improved growth performan...
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#1Hany M. R. Abdel-Latif (Alexandria University)H-Index: 2
#2Mahmoud A.O. Dawood (Kafrelsheikh University)H-Index: 20
Last. Mansour El-Matbouli (University of Veterinary Medicine Vienna)H-Index: 29
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Co-infections commonly arise when two or multiple different pathogens infect the same host, either as simultaneous or as secondary concurrent infection. This potentiates their pathogenic effects and leads to serious negative consequences on the exposed host. Numerous studies on the occurrence of the bacterial, parasitic, fungal and viral co-infections were conducted in various tilapia species. Co-infections have been associated with serious negative impacts on susceptible fish because they incre...
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#1Fawzy I. Magouz (Kafrelsheikh University)H-Index: 1
#2Mahmoud A.O. Dawood (Kafrelsheikh University)H-Index: 20
Last. Ayman A.I. Mohamed (Kafrelsheikh University)H-Index: 1
view all 6 authors...
Abstract Despite the ability of Nile tilapia to resist a wide range of temperatures, the over and suboptimal temperature causes a decline in the growth rates. The use of growth enhancers may lead to an increase in the feeding ability of fish and thus increase the growth and health efficiency under low-temperature conditions. Therefore, Nile tilapia (initial weight, 21 ± 0.01 g) fed four diets supplemented with a digestive enhancer (a mixture of taurine and medium-chain fatty acids) (DME) at 0, 1...
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