SURVEY OF REPTILES IN NECHISAR NATIONAL PARK, SOUTHERN ETHIOPIA Samy A. Saber, Fikirte Gebresenbet, Afework Bekele, Eman N Salama Russian Journal of Herpetology, 2024 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 Journal of Aquatic Biology and Fisheries, 2024 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, Ahmed Nabeeh Egyptian Pharmaceutical Journal, 2023 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. Egyptian Journal of Aquatic Biology and Fisheries, 2022 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 _____________________________________________________________________________
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 Egyptian Journal of Aquatic Biology and Fisheries, 2022
