Samy Abdel Lat

@azhar.edu.eg

Zoology Department- Faculty of Science
Al Azhar University



           

https://researchid.co/samysaber

RESEARCH INTERESTS

Herpetology- Biodiversity- Ecology- Environmental Science- Conservation- Environmental pollution- Animal Taxonomy- Natural resources- Climate change- snake venom - remote sensing- Desert ecology- marine ecology

34

Scopus Publications

Scopus Publications

  • SURVEY OF REPTILES IN NECHISAR NATIONAL PARK, SOUTHERN ETHIOPIA
    Samy A. Saber, Fikirte Gebresenbet, Afework Bekele, and Eman N Salama
    Folium Publishing Company
    Species diversity, composition, relative abundance and evenness of the reptilian communities in Nechisar National Park were studied. The survey was conducted using pitfall traps, active search and cover sheet methods. The study identified 34 reptile species belonging to 3 orders (Squamata, Testudines, and Crocodylia). Squamata was the most diverse containing 30 species belonging to 2 suborders: Sauria which consists of 19 species from 7 families and 10 genera; and Serpentes which consists of 11 species from 5 families and 10 genera. Testudines included 3 species from 2 families and 3 genera. Crocodylia was represented by a single species. Reptile diversity varied among the different habitat types, with the bushland habitat having the highest number of species representing 29.69% of the total species recorded.


  • Monitoring and Predicting Potential Fishing Grounds of Trachurus mediterraneus Using Remotely Sensed Data Along the North Sinai Coastal Zone, Egypt
    El-Gharbawy et al.
    Egyptian Knowledge Bank
    The Mediterranean horse mackerel, Trachurus mediterraneus , is the second most important species, economically and yield contributory, in the North Sinai fisheries after Sardinella aurita . Although the fishing grounds constantly change due to environmental factors, the fishing activities are still based on traditional methods; therefore, determining the Potential Fishing Zones (PFZs) must depend on effective and advanced techniques to monitor the optimal PFZs for T. mediterraneus along the North Sinai Coastal Zone. This study integrates the Sentinel-3 satellite's remotely sensed data, advanced digital imagery processing techniques, and fish yield data obtained from the General Authority for Fish Resources Development (GAFRD) for T. mediterraneus in the North Sinai fisheries during 2021 to build a suitable model for determining, monitoring, and predicting the other optimal (PFZs) for T. mediterraneus along the North Sinai Coastal Zone. The results confirmed that, regarding the total catch of T. mediterraneus in 2021, the highest catch reached 1.4 and 1.3 tons in June and July, respectively, while the lowest catch reached 0.14 tons in January. The predicted PFZs were estimated to be 6 times more than the fishing grounds that fishermen currently fish; moreover, the predicted annual production for T. mediterraneus was about 4.6 times the actual production. Furthermore, the North Sinai fisheries were not fully exploited due to the mis-determination of optimal PFZs and undeveloped fishing gears. This study highlights the importance of using remotely sensed data to help increase the national income from the fisheries sector by determining and predicting new fishing zones.



  • Therapeutic effects of the Egyptian horned viper LAAO against hepatocellular carcinoma induced in rats
    GomaaH Mahmoud, SamyA Saber, SamahA Loutfy, WalaaH Salama, and Ahmed Nabeeh
    Medknow
    Background The most common kind of liver cancer, hepatocellular carcinoma (HCC), is the fourth leading cause of cancer-related mortality worldwide and has poor prognosis. Strong hepatocarcinogen diethyl nitrosamine (DENA) is a well-known substance. It is well known that DENA damages DNA repair enzymes and is typically used to cause liver cancer in experimental animal models, such as rats. Cerastes cerastes L-amino acid oxidase (Cc-LAAO) has hepatoprotective, antioxidant, and anticancer effects. Objective To assess the effectiveness of L-amino acid oxidase (LAAO) as a hepatoprotective agent in comparison to paclitaxel (PAC) as a conventional anticancer medicine in the early identification of HCC using biomarkers [alpha-fetoprotein (AFP) and carcinoembryonic antigen (CEA)], various liver function tests, and oxidant and antioxidant tests. Materials and methods CCl4 (200 mg/kg b.wt.) was injected subcutaneously once a week for 3 weeks after a single IP dose of DENA (200 mg/kg b.wt.) to develop hepatocellular cancer in rats. Twenty-five adult, mature, healthy rats were used in this investigation; their average weight was 100±10 g, and they were divided into five groups, each with five rats. After the experiment, some hepatic tests, histology of the liver, a tumor biomarker, and some kidney functions were assessed for all groups. Results and conclusion ASAT, ALAT, ALP, total bilirubin, tumor markers AFP, CEA, and lipid peroxides malondialdehyde (MDA) significantly rose in serum after DENA administration in rats, whereas activating antioxidants like SOD, CAT, GPx, and GSH decreased. LAAO and paclitaxel significantly ameliorated biomarkers for liver damage, lipid peroxides (MDA), antioxidants such as (SOD), (CAT), (GSH), (GPx), tumor marker (AFP), and (CEA) compared with the HCC group. Histopathology showed vacuolar hepatocytes with dispersed hepatocyte necrosis and infiltration of mononuclear cells. When used with DENA, the LAAO administration reduced negative effects and produced positive effects. These findings demonstrate that LAAO prevents liver HCC caused by DEN by preventing lipid peroxidation, hepatic cell oxidative stress, and boosting the antioxidant system.


  • Liver toxicity and geospatial analysis as integrated indices of water quality deterioration in Idku Lake, Egypt
    Aml S. Said et al.
    Egypts Presidential Specialized Council for Education and Scientific Research
    1. Zoology Department, Faculty of Science (Girls), Al-Azhar University, Cairo, Egypt. 2. Zoology Department, Faculty of Science (Boys), Al-Azhar University, Cairo, Egypt. 3. Marine Science Department, National Authority for Remote Sensing & Space Sciences, Cairo, Egypt. 4. Zoology Department, Faculty of Science, Al-Azhar University, Assiut, Egypt. * Corresponding Author: Aml.mohamed@azhar.edu.eg _____________________________________________________________________________


  • A Survey of Summer Breeding Seabirds on Elba National Park Islands, the Red Sea, Egypt
    Mahmoud Abdelhafez et al.
    Egypts Presidential Specialized Council for Education and Scientific Research


  • Which is a stronger predictor of the abundance of Dorcas Gazelle, Gazella dorcas in the Eastern desert of Egypt: human or natural factors?
    Abdullah Nagy, Eman M. E. Mohallal, Sameh El-Kafrawy, and Samy A. Saber
    Informa UK Limited
    The Dorcas Gazelle, Gazella dorcas, has lost 86% of its global historical range, and is regionally categorized as endangered by the IUCN. The factors that caused this decline have never been quantified. In this work, field and remotely sensed data were used to examine the ecological and anthropogenic factors affecting the abundance of Dorcas Gazelle within Wadi El-Gemal Protected Area in the Eastern desert of Egypt, using Generalized Linear Mixed Models (GLMM). The species’ abundance is shaped by anthropogenic activities (number of car trails and proximity to the coastal road) more than ecological factors (vegetation and wetness indices). Dorcas Gazelle is avoiding more humid and greener areas because of human disturbance. Such suitable habitats may be perceived by gazelles as too dangerous, and the animals therefore prefer less suitable but safer habitats that are further away or less frequented by humans. Moreover, an easy to conduct, cheap monitoring tool, the Kilometric Abundance Index (KAI), was devised and implemented for baseline information to be used for future monitoring of Dorcas Gazelle.

  • Seasonal variations of some heavy metal concentrations in seawater, sediment, and the surf clam, Mactra olorina (Philippi, 1846) in the Great Bitter Lake, Suez Canal, Egypt


  • Geomatics approach to assess nesting habitat of green turtles Wadi El Gemal, Red Sea, Egypt
    Mostafa A. Soliman, Sameh B. El Kafrawy, Rashad E.M. Said, Samy A. Saber, and Frank E. Muller-Karger
    Elsevier BV
    Abstract Long-term wave action, sea level rise, climate change, human activities, pollutants, sea surface temperature SST, are causative factors for deterioration and changes in natural ecosystems. The current study aims to assess environmental deterioration that disturbs turtles and their nesting grounds at Wadi El Gemal National Park (WGNP), using modern remote sensing techniques and ecological investigations. Nesting area mapping and change detection were found to be precise and clear in the current investigation. The true nests recorded from WGNP during the current survey were Wadi El Gemal Delta (3), Torfa (10), Elshiekha Sabieha (2), Hankorab (14), Umm Alabas, Wadi El Gemal Island (1) and Syial Island (1). The concentration of some heavy metals in eggshells were positively correlated with their concentrations in sand (p ≤ 0.01), while heavy metals in nesting sands were negatively correlated with grain size (p


  • Ultrastructural comparison between the tongue of two reptilian species endemic in Egyptian fauna; Bosc's fringe-toed lizard Acanthodactylus boskianus and Sinai fan-fingered gecko Ptyodactylus guttatus
    Doaa I. Gewily, Fatma A. Mahmoud, Samy A. Saber, Boshra A. ElSalkh, Asmaa A. El‐Dahshan, Mohamed M. A. Abumandour, Ramadan M. Kandyel, and Ali G. Gadel‐Rab
    Wiley
    The current observations focused on the ultrastructure comparison between the tongue of two reptile species endemic the Egyptian fauna; Bosc's fringe‐toed lizard Acanthodactylus boskianus and Sinai fan‐fingered gecko Ptyodactylus guttatus to exhibit the relationship between the lingual epithelium and its function according to their specific feeding strategy. A. boskianus possessed triangular elongated tongue with bifurcated tapering apex and wide base while; the P. guttatus had a triangular flattened tongue with conical shallow bifurcated apex and broad base. The ventral surface of the lingual apex of A. boskianus had transverse while in P. guttatus had two oval pads and median ventral groove. Both surfaces of the tongue of both examined species are covered by stratified squamous epithelium with great variability of degree of keratinization. The dorsal epithelium formed flattened and conical filiform papillae in A. boskianus, while in P. guttatus formed cylindrical papillae, conical, and tall filiform ones. Few taste buds are observed on the fore‐tongue but increase on the mid‐tongue of A. boskianus, while in P. guttatus, numerous taste buds are distributed on the fore‐tongue and mid‐tongue. Both surfaces of the laryngeal mound of both examined species provided with numerous of cilia and orifices of laryngeal gland. The present results confirmed that the tongue of A. boskianus acts as a chemoreceptor organ to follow pheromone trails of prey and mates. While in P. guttatus the tongue may play an important role in the feeding mechanism and act as a chemoreceptor organ.

  • Impact of tourism and fishing on the coral reef health along the west coast of the Gulf of Aqaba, Red Sea, Egypt
    Kareem F. Darweesh et al.
    Egypts Presidential Specialized Council for Education and Scientific Research

  • Genotoxicity and limbs asymmetry in the Egyptian toad (Sclerophrys regularis) as biomarkers for heavy metals toxicity
    Noura M. A. Khattab et al.
    Egypts Presidential Specialized Council for Education and Scientific Research
    The recent dramatic declines in amphibian populations and the higher rate threat of extinction, which exceeds one third of the current species, have received attention of conservationists (Gower et al., 2013). The biodiversity characteristics that amphibians exhibit are indicated through their ability to coexist in two different ecosystems, whether it is aquatic or terrestrial, given the fact that each ecosystem imposes a number of constraints that amphibians have to biologically abide by Lion et al. (2019). ARTICLE INFO ABSTRACT Article History: Received: Aug. 18, 2021 Accepted: Aug. 24, 2021 Online: Aug. 30, 2021 _______________

  • 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, Egypt
    Sameh B. El Kafrawy, Rashad E.M. Said, Samy A. Saber, Mostafa A. Soliman, and Nagy M. Al Attar
    Elsevier BV
    Abstract Remote sensing has become a worldwide tool for natural resource managers as well as government agencies, industry and conservation organizations. Furthermore, it is a valuable technique in detecting and mapping different types of cosmopolitan hazards. Activities and development along the Egyptian Red Sea coast have grown in fast and remarkable manner. Tourism is one of the leading sources of income to Egypt's economy; tourism activities can affect marine and coastal living and nonliving components of local ecosystems. Sea turtles are among the most threatened and endangered animals due to human encroachments that affect nesting grounds and fishing activities that affect animals at foraging grounds and during migrations. The hawksbill Eretmochelys imbricata is a critically endangered species that nests in Giftun Island in the Red Sea off Egypt. Remote sensing and satellite imagery provided observations that show that Giftun Island is suffering from anthropogenic and physical threats; the results explain a decline in nests of Eretmochelys imbricata.

  • Long-term evaluation of eutrophication problem using multi-sensor satellite data along El-Max Bay, Alexandria coast and Abu-Qir Bay, Egypt
    Ali A. H. Abdelsalam, Samy A. Saber, Sameh B. El-Kafrawy, and Hamdy A. H. Abo-Taleb
    Egypts Presidential Specialized Council for Education and Scientific Research

  • An integrated field survey and remote sensing approach for marine habitat mapping along hurghada coast, red sea, Egypt
    Ahmed H. Abo Elenin, Samy A. Saber, Sameh B. El-Kafrawy, and Hussein A. El-Naggar
    Egypts Presidential Specialized Council for Education and Scientific Research

  • Assessment of weather and climate variability over the western harbor of Alexandria, Egypt
    Badea M. B. Mahfouz, Alaa G. M. Osman, Samy A. Saber, and Hassan M. M. Kanhalaf-Allah
    Egypts Presidential Specialized Council for Education and Scientific Research
    The climate system is a complicated system consisting of five major interacting components: the land surface, the biosphere, the atmosphere, the hydrosphere, and the cryosphere (IPCC, 2001). This system is influenced by various external forcing mechanisms, including different anthropogenic activities and solar radiation from the sun. There are two types of change in the climate system: climate change and climate variability: climate variability concerns changes that occur within smaller timeframes, ARTICLE INFO ABSTRACT Article History: Received: July 13, 2020 Accepted: July 28, 2020 Online: July 30, 2020 _______________

  • Amphibian diversity in relation to environmental change in harenna forest, bale mountains national park, Ethiopia: A remote sensing and GIS approach
    Samy A. Saber, Roman Kassahun, Simon P Loader, and Sameh B. El Kafrawy
    Egypts Presidential Specialized Council for Education and Scientific Research
    1Zoology Department, Faculty of Science, Al-Azhar University, Cairo, Egypt. 2Ministry of Agriculture (MoA), Addis Ababa, Ethiopia, P.O.Box: 6234. 3Environmental Sciences Department, University of Basel, Biogeography Research Group, Basel 4056, Switzerland. 4-Marine Sciences Department, National Authority for Remote Sensing &Space Sciences (NARSS), Cairo, Egypt. *Corresponding author: sameh@narss.sci.eg

  • First report on the reptile diversity of wadi el gemal national park, Eastern Desert, Egypt
    Konstantin D. Milto, Samy A. Saber, Abdullah M. Nagy, Roman A. Nazarov, Daniel A. Melnikov, and Natalia B. Ananjeva
    Folium Publishing Company
    The herpetofauna of Wadi El Gemal National Park, Eastern Desert, Egypt currently includes 28 reptile species. Three large wadies, Wadi El Gemal, Wadi Abu Ghusoun and Wadi Sartout, were observed as a model of the species composition within the national park. Species assemblages, taxonomic and ecological diversity, and the biogeographical affinities of reptiles in the specific environment of the hyperarid desert are discussed.

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