Rashad ElSayed Mohammed Said

@azhar.edu.eg

Department of Zoology, Faculty of Science, Al-Azhar University, 71524 Assiut, Egypt.
Al–Azhar university Faculty of science (71524) Assiut Branch. Egypt

Rashad ElSayed Mohammed Said


                  Download Compact PDF  
https://researchid.co/rashadsaid
My scientific interest is biomonitoring of environmental pollution using bioindicator organisms, in both field and via experimental assy. Also, collection, identification, fixation, and preservation of aquatic and terrestrial specimens. Determination of physicochemical properties of ecosystem. Laboratory techniques for some histopathological studies, genotoxicity, biochemical tests as biomarkers to assess the pollution status in the environment, and biodiversity and climate change

EDUCATION

1. B.Sc. in Marine Biology 2002, Department of Zoology, Faculty of Science, Al-Azhar University, 71524 Assiut, Egypt.
2. M.Sc. in Marine Biology 2009 (Invertebrates) , Department of Zoology, Faculty of Science, Al-Azhar University, 71524 Assiut, Egypt.
3. Ph.D. in environmental pollution 2013, Department of Zoology, Faculty of Science, Al-Azhar University, 71524 Assiut, Egypt.

RESEARCH, TEACHING, or OTHER INTERESTS

Environmental Science, Health, Toxicology and Mutagenesis, Aquatic Science, Ecology
37

Scopus Publications

578

Scholar Citations

15

Scholar h-index

22

Scholar i10-index

Scopus Publications

RECENT SCHOLAR PUBLICATIONS

  • Toxic effects of MPs and Up Grade® herbicide on the Nile tilapia (Oreochromis niloticus): Oxidative stress, immune responses, and histopathological investigations
    REM Said, AEA Badrey, M Hamed, IA Mohamed, HAM Soliman, ...
    2026
  • Developmental and Neurobehavioural Toxicity of Per-and Polyfluoroalkyl Substances in Aquatic Organisms: Mechanistic Insights from Molecular Disruption to Behavioural Dysfunction
    M Hamed, M Abbas, AKMM Hasan, SM Kteeba, H Taher, M Abdel-Wahab, ...
    Aquatic Toxicology, 107719 , 2026
    2026
  • Interactive effects of black sand and heat stress on coral reefs at red Sea, Egypt
    AEDH Sayed, MY Omer, A Farrag, REM Said, HAM Soliman, Z Bakr, ...
    Marine Pollution Bulletin 222, 118601 , 2026
    2026
    Citations: 3
  • Resilient reefs in crisis: A 25-year synthesis of coral reef change, stressors, and conservation in Egyptian Red Sea coasts
    MHM Mohammed, REM Said, A Mahdy
    Archives of Agriculture Sciences Journal 8 (3), 112-138 , 2025
    2025
  • Botanical remedies ameliorate oxidative stress, immune response, and histopathology in Clarias gariepinus exposed to pyrogallol
    M Hamed, REM Said, MH Kotob, AEDH Sayed
    Environmental Pollution 382, 126628 , 2025
    2025
    Citations: 2
  • Ecotoxicological Impacts of Perfluorooctane Sulfonate on the Freshwater Snail Lanistes carinatus : Oxidative Stress, Neurotoxicity, and Histopathological Alterations
    M Hamed, M Abdel-Wahab, REM Said, AEDH Sayed
    International Journal of Molecular Sciences 26 (18), 8898 , 2025
    2025
    Citations: 1
  • Impact of Polyonchobothrium magnum on health and gut microbial ecology of African catfish ( Clarias gariepinus ): Insights from morphological, molecular, and …
    AM Fouad, HG Abo‐Al‐Ela, EA Negm, M Abdelhaseib, A Alian, ...
    Journal of Fish Diseases 48 (9), e14013 , 2025
    2025
    Citations: 3
  • Immunological, neurological, and intestinal changes in red swamp crayfish (Procambarus clarkii) exposed to the combined toxicity of Pyrogallol and microplastics
    M Hamed, REM Said, WM Shaalan, HAM Elbaghdady, AEDH Sayed
    Marine pollution bulletin 213, 117641 , 2025
    2025
    Citations: 20
  • Exploring the Coexposure Effects of Pyrogallol and Microplastic on the Red Swamp Crayfish Procambarus clarkii
    REM Said, M Hamed, WM Shaalan, HAM Elbaghdady, AEDH Sayed
    Aquaculture Research 2025 (1), 6084150 , 2025
    2025
    Citations: 10
  • UV-A-induced oxidative stress and immunotoxicity in African catfish ( Clarias gariepinus ): the bioremediation potential of Spirulina platensis for aquaculture
    M Hamed, CE Monteiro, REM Said, MA Abdel-Maksoud, TN Almanaa, ...
    Aquaculture International 33 (1), 45 , 2025
    2025
    Citations: 6
  • Impacts of climate change and black sand on Red Sea, Egypt. A comprehensive review
    M Hamed, MA Khaled, REM Said, M Abd El-Aal, SM Ghoneim, MY Omer, ...
    Regional Studies in Marine Science 78, 103787 , 2024
    2024
    Citations: 8
  • Patterns distribution, concentrations and sources of radioactive elements from black sand in the Red Sea coast, Egypt
    M Hamed, MA Khaled, REM Said, SM Ghoneim, E Saad, M Abd El-Aal, ...
    Journal of Hazardous Materials 480, 136051 , 2024
    2024
    Citations: 8
  • DNA barcoding for different egyptian and qatari common snappers reveals unexpected cryptic lineages in the blackspot snapper Lutjanus ehrenbergii
    A Galal-Khallaf, AI Elberri, HE Hasieb, REM Said, E Mohammed-AbdAllah, ...
    Marine Biodiversity 54 (6), 85 , 2024
    2024
    Citations: 2
  • Impact of Polycyclic Aromatic Hydrocarbons on the Ovary of Clarias gariepinus in Two Canals of Al-Minufiya Governorate, Egypt.
    N Khttab, HMM Khalaf-Allah, WTS Shalaby, REM Said
    Egyptian Journal of Aquatic Biology & Fisheries 28 (6) , 2024
    2024
    Citations: 1
  • Evaluation of the Impact of Polycyclic Aromatic Hydrocarbons on the Liver and Kidney of Clarias gariepinus Inhabiting Two Nile Delta Canals, Egypt.
    N Khattab, WTS Shalaby, HMM Khalaf-Allah, REM Said
    Egyptian Journal of Aquatic Biology & Fisheries 28 (6) , 2024
    2024
    Citations: 1
  • Black sand nanoparticles and heat stress impacts the neurological and oxidative stress indices and splenic-renal histology of Clarias gariepinus
    AEDH Sayed, REM Said, MA El-Aal, E Saad, WA Kamel, M Hamed
    Scientific Reports 14 (1), 21993 , 2024
    2024
    Citations: 11
  • Effects of dietary supplementation with Bacillus velezensis on the growth performance, body composition, antioxidant, immune-related gene expression, and histology of …
    AEM Abdelsamad, REM Said, M Assas, AY Gaafar, AH Hamouda, ...
    BMC Veterinary Research 20 (1), 368 , 2024
    2024
    Citations: 23
  • Neurotoxic and cardiotoxic effects of pyrogallol on catfish (Clarias gariepinus)
    M Hamed, CJ Martyniuk, HAM Soliman, AGM Osman, REM Said
    Environmental Toxicology and Pharmacology 109, 104481 , 2024
    2024
    Citations: 14
  • Age and Growth of the Blackspot Snapper Lutjanus ehrenbergii (Family: Lutjanidae), from the Red Sea and the Arabian Gulf.
    HE Hasieb, E Mohammed-AbdAllah, REM Said, AGM Osman
    Egyptian Journal of Aquatic Biology & Fisheries 28 (4) , 2024
    2024
    Citations: 3
  • Status of the sea urchin, Diadema setosum (Echinodermata, Echinoidea, Diadematidae) along the Egyptian Red Sea coasts
    A Ghallab, REM Said, A Mahdy
    Egyptian Journal of Aquatic Biology and Fisheries 28 (4), 647-655 , 2024
    2024
    Citations: 5

MOST CITED SCHOLAR PUBLICATIONS

  • Amphibians as bioindicators of the health of some wetlands in Ethiopia
    S Saber, W Tito, R Said, S Mengistou, A Alqahtani
    The Egyptian Journal of Hospital Medicine 66 (1), 66-73 , 2017
    2017
    Citations: 67
  • Exposure to pyrogallol impacts the hemato-biochemical endpoints in catfish (Clarias gariepinus)
    M Hamed, CJ Martyniuk, REM Said, HAM Soliman, AEA Badrey, ...
    Environmental Pollution 333, 122074 , 2023
    2023
    Citations: 36
  • Oxidative stress, antioxidant defense responses, and histopathology: Biomarkers for monitoring exposure to pyrogallol in Clarias gariepinus
    M Hamed, HAM Soliman, REM Said, CJ Martyniuk, AGM Osman, ...
    Journal of Environmental Management 351, 119845 , 2024
    2024
    Citations: 33
  • Immunotoxicological, histopathological, and ultrastructural effects of waterborne pyrogallol exposure on African catfish (Clarias gariepinus)
    M Hamed, REM Said, HAM Soliman, AGM Osman, CJ Martyniuk
    Chemosphere 349, 140792 , 2024
    2024
    Citations: 27
  • Analysis of SST and Chl-a data from MODIS-Aqua in the Major Egyptian Fishing Zones of the Red Sea
    MA Khaled, FH Al-Jamali, REM Said, AS Mohammad, MH Ahmed, ...
    Egyptian Journal of Aquatic Research 49 (4), 520-529 , 2023
    2023
    Citations: 27
  • First record of red-tide in Elba protectorate coast using Sentinel-3 and its impacts on ecosystem
    A Mahdy, REM Said, MA Khaled, AA Abdelsalam
    The Egyptian Journal of Remote Sensing and Space Sciences 25 (3), 803-813 , 2022
    2022
    Citations: 26
  • Effects of dietary supplementation with Bacillus velezensis on the growth performance, body composition, antioxidant, immune-related gene expression, and histology of …
    AEM Abdelsamad, REM Said, M Assas, AY Gaafar, AH Hamouda, ...
    BMC Veterinary Research 20 (1), 368 , 2024
    2024
    Citations: 23
  • Haematological, serological and genotoxic findings in the African catfish Clarias gariepinus after the administration of copper nanoparticles and penconazole
    AG Osman
    EC Vet. Sci 4, 01-14 , 2019
    2019
    Citations: 21
  • Immunological, neurological, and intestinal changes in red swamp crayfish (Procambarus clarkii) exposed to the combined toxicity of Pyrogallol and microplastics
    M Hamed, REM Said, WM Shaalan, HAM Elbaghdady, AEDH Sayed
    Marine pollution bulletin 213, 117641 , 2025
    2025
    Citations: 20
  • Using remote sensing and geographic Information system to assess the status of the nesting habitat of hawksbill turtles (Eretmochelys imbricata): At Big Giftun Island, Red Sea …
    SB El Kafrawy, REM Said, SA Saber, MA Soliman, NM Al Attar
    The Egyptian Journal of Remote Sensing and Space Science 23 (1), 77-87 , 2020
    2020
    Citations: 18
  • Reproductive and endocrine-disrupting toxicity of pyrogallol in catfish (Clarias gariepinus)
    M Hamed, REM Said, CJ Martyniuk, HAM Soliman, AEDH Sayed, ...
    Environmental Pollution 352, 124104 , 2024
    2024
    Citations: 16
  • Regional variability in remotely sensed data with respect to the distribution of some snapper fishes (Family: Lutjanidae) between the Red Sea and the Arabian Gulf
    REM Said, HE Hasieb, MA Khaled, E Mohammed-AbdAllah, AGM Osman
    Scientific African 23, e02104 , 2024
    2024
    Citations: 16
  • The efficiency of Sclerophrys regularis as a bioindicator
    N Khattab, S Saber, B El-Salkh, R Said
    Egyptian Academic Journal of Biological Sciences, B. Zoology 13 (1), 91-101 , 2021
    2021
    Citations: 16
  • The first record of the lessepsian migrant Pteragogus trispilus Randall 2013 (Osteichthyes: Labridae) off the Libyan coast, east Mediterranean Sea
    A Fitori, A Mahdy, REM Said, A Al-Faturi
    Egyptian Journal of Aquatic Research 47 (4), 381-385 , 2021
    2021
    Citations: 15
  • Genotoxicity and limbs asymmetry in the Egyptian toad (Sclerophrys regularis) as biomarkers for heavy metals toxicity
    K MA
    Egyptian Journal of Aquatic Biology and Fisheries 25 (4), 705-717 , 2021
    2021
    Citations: 15
  • Neurotoxic and cardiotoxic effects of pyrogallol on catfish (Clarias gariepinus)
    M Hamed, CJ Martyniuk, HAM Soliman, AGM Osman, REM Said
    Environmental Toxicology and Pharmacology 109, 104481 , 2024
    2024
    Citations: 14
  • Biomarker responses in Sclerophrys regularis (Anura: Bufonidae) exposed to atrazine and nitrate
    RESM Said, AS Said, SAL Saber, BAEA ElSalkh
    Pollution 8 (4), 1387-1397 , 2022
    2022
    Citations: 13
  • Efficiency of polychaete Nereis (Neanthes) succinea as biomonitor for heavy metals pollution in the Red Sea, Egypt
    RE Said, AT AbdAllah, MA Mostafa, NA El-Shimy
    Atmospheric and Oceanic Sciences 2 (1), 18-23 , 2017
    2017
    Citations: 13
  • Limbs asymmetry as biomarker in the Egyptian toad Amietophrynus regularis Exposed to Atrazine and Nitrates
    SA Saber, BA El Salkh, AS Said, REM Said, AG Gadel-Rab
    Inter. J. Ecotoxicol. Ecobiol 1 (3), 103-110 , 2016
    2016
    Citations: 12
  • Black sand nanoparticles and heat stress impacts the neurological and oxidative stress indices and splenic-renal histology of Clarias gariepinus
    AEDH Sayed, REM Said, MA El-Aal, E Saad, WA Kamel, M Hamed
    Scientific Reports 14 (1), 21993 , 2024
    2024
    Citations: 11