Alexander Atanasoff

Bio: Alexander Atanasoff is an academic researcher from Trakia University. The author has contributed to research in topics: Carp & Hemolymph. The author has an hindex of 2, co-authored 8 publications receiving 24 citations.

Black Sea Aquaculture: Legacy, Challenges & Future Opportunities

Abstract: Additional co-authors: Dilek Fidan, Linda Fourdain, Marco Frederiksen, Archil Guchmanidze, Housam Hamza, Jessica Harvey, Magda Nenciu, Galin Nikolov, Victor Niţa, Muhammed Dogan Ozdemir, Elitsa Petrova-Pavlova, Gabriel Popescu, Ferit Rad, Safak Seyhaneyildiz Can, John A. Theodorou, Behnan Thomas, Nicolo Tonachella, Ekaterina Tribilustova, Irina Yakhontova, Ahmet Faruk Yesilsu, Guzel Yucel-Gier

Proximate and mineral analysis of Atlantic salmon (Salmo Salar) cultivated in Bulgaria

Abstract: Problem statement: Only limited information exists on nutrients in salmonoids meat in Bulgaria, which may to be different and vary to a greater extent than the nutrient composition of other fish items. The present paper is aimed to determine the proximate composition, macro and trace elements of Atlantic salmons meat. These data could be helpful in judging the value of nutrient composition data as a base for dietary recommendations. Organisms: 12 species of Atlantic salmon (Salmo salar). Approach: The aim of this study was to determine the proximate composition and levels of iron, potassium, sodium, calcium, phosphorus, magnesium, copper, selenium and zinc in Atlantic salmon cultivated for the first time in Bulgaria. The content of protein, fat and ash and concentrations of iron, potassium, sodium, calcium, phosphorus, magnesium, copper, selenium and zinc were determined by automatic systems and electro thermal atomic absorption spectrometry (ETAAS) after microwave digestion. Mean values and their respective coefficients of variation were calculated from the measured concentrations. Conclusion: In order to provide an accurate overview and to be able to calculate reliable dietary intakes, it is important to know the fish composition data.

Glomerular and Tubular Markers in Dogs with Chronic Kidney Failure and Healthy Control Dogs

Abstract: The study aimed to examine the changes in two glomerular markers (uALB, uCRP), as well three tubular markers (uGGT, uALP, and uLDH) in dogs with Chronic Kidney Failure (CKF) and to compare the changes to healthy control dogs Fourteen dogs with CKF of different age, breed and sex were included in the study as well 10 healthy control dogs The diagnosis was based on physical examination and laboratory findings Urinary ALB/Cr was significantly higher in CKF dogs than in healthy control dogs No significant increase in urinary LDH/Cr, uGGT/Cr and uAF/Cr was found in CKF dogs than in healthy control dogs No significant difference was detected for uCRP, which was not detectable in control dogs and only in 4 of the CKF dogs The studied glomerular marker (uALB) in dogs with CKF was significantly increased compared to healthy control dogs Urinary CRP, uLDH, uGGT and uAF cannot be reliable indicators for CKF in dogs

Natural Strategies as Potential Weapons against Bacterial Biofilms

Abstract: Microbial biofilm is an aggregation of microbial species that are either attached to surfaces or organized into an extracellular matrix. Microbes in the form of biofilms are highly resistant to several antimicrobials compared to planktonic microbial cells. Their resistance developing ability is one of the major root causes of antibiotic resistance in health sectors. Therefore, effective antibiofilm compounds are required to treat biofilm-associated health issues. The awareness of biofilm properties, formation, and resistance mechanisms facilitate researchers to design and develop combating strategies. This review highlights biofilm formation, composition, major stability parameters, resistance mechanisms, pathogenicity, combating strategies, and effective biofilm-controlling compounds. The naturally derived products, particularly plants, have demonstrated significant medicinal properties, producing them a practical approach for controlling biofilm-producing microbes. Despite providing effective antibiofilm activities, the plant-derived antimicrobial compounds may face the limitations of less bioavailability and low concentration of bioactive molecules. The microbes-derived and the phytonanotechnology-based antibiofilm compounds are emerging as an effective approach to inhibit and eliminate the biofilm-producing microbes.

CHANGES IN CERTAIN ACUTE PHASE PROTEINS OF COMMON CARP (Cyprinus carpio) EXPOSED TO ORGANOPHOSPHATE INSECTICIDES

Abstract: The acute phase response (APR) is a nonspecific reaction of fish to disturbances in homeostasis. The aim of present study was to investigate quantitative changes that occur in the concentration of acute phase proteins (APPs) in the blood of commercial size common carp ( Cyprinus carpio L. ) exposed to organophosphate insecticides within the month of April during ameliorative activities. Parameters examined were fibrinogen (Fib), ceruloplasmin (Cp) as a positive APPs and albumin (Alb) as a negative APP. Histological sections of the hepatopancreas and kidneys from 25 fish have been examined. The hepatopancreas was chosen for this investigation as it is the primary site of acute phase protein synthesis. APP parameters plasma fibrinogen ( P <0.05) registered a significantly increased and albumin ( P <0.05) exhibited statistically declined in treated group. Based on the data acquired in this study, it was concluded that, the carp do not exhibit a strong APP synthesis during the early stages of an APR after spraying with organophosphate insecticides. The results from this study show that t he concentrations of fibrinogen are not significantly increase as well as the levels of ceruloplasmin remained unchanged.

A Review of Three Commonly Used Fish Anesthetics

Abstract: Anesthesia plays a critical role in prevention of mechanical injuries and manipulation stress in fish. Commercially reared fish are subjected to confinement and handling including netting, ...

DHA and EPA Content and Fatty Acid Profile of 39 Food Fishes from India

Abstract: Docosahexaenoic acid (DHA) is the principal constituent of a variety of cells especially the brain neurons and retinal cells and plays important role in fetal brain development, development of motor skills, and visual acuity in infants, lipid metabolism, and cognitive support and along with eicosapentaenoic acid (EPA) it plays important role in preventing atherosclerosis, dementia, rheumatoid arthritis, Alzheimer's disease, and so forth. Being an essential nutrient, it is to be obtained through diet and therefore searching for affordable sources of these ω-3 polyunsaturated fatty acids (PUFA) is important for consumer guidance and dietary counseling. Fish is an important source of PUFA and has unique advantage that there are many food fish species available and consumers have a wide choice owing to availability and affordability. The Indian subcontinent harbors a rich fish biodiversity which markedly varies in their nutrient composition. Here we report the DHA and EPA content and fatty acid profile of 39 important food fishes (including finfishes, shellfishes, and edible molluscs from both marine water and freshwater) from India. The study showed that fishes Tenualosa ilisha, Sardinella longiceps, Nemipterus japonicus, and Anabas testudineus are rich sources of DHA and EPA. Promotion of these species as DHA rich species would enhance their utility in public health nutrition.