Akademik Veri Yönetim Sistemi
13th INTERNATIONAL MODERN SCIENCES CONGRESS, Bangkok, Tayland, 18 - 21 Mayıs 2026, ss.25-28, (Özet Bildiri)
Water resources are considered scarce natural resources. Their importance is increasing day by day, especially due to rapid population growth and industrialisation. The quality of water resources varies depending on the amount of biotic and abiotic components they contain. Substances found in water can be both naturally occurring and anthropogenically derived. These components can cause genotoxic damage to aquatic organisms. Nickel is a mineral found in natural rock structures and is frequently used in industry, particularly in stainless steel and battery production. The maximum permissible amount in water is stated as 34 μg/L. This study was conducted at Sorgun Lake (Ankara) and focused on the invasive fish species living there, the stone moroko (Pseudorasbora parva). Seasonal samples were taken from the lake water in 2025 and analysed photometrically. Fish caught from the lake using traps with various mesh sizes (n=250, Mean Fork Length: 4.87±0.81 cm, Mean Weight: 1.15±0.53 g) were brought alive to the laboratory. The fish were acclimatised for 15 days. They were fed daily with prepared pellet feed at a rate of 5% of their weight. At the end of the acclimatisation period, the fish were subjected to the experiment. Three groups were formed in the experiment: a control group and two dose groups, with double replicates. Fish were randomly selected for the groups. The fish were exposed to nickel at sublethal doses of 1/50 (0.602 mg/L) and 1/100 (0.301 mg/L), which are below the LC50 (30.10 mg/L) reported in the literature, for 96 hours. At the end of the exposure, blood samples were taken from the caudal vein of the fish under ice anaesthesia. Blood samples were spread onto slides using the peripheral smear method and stained with Giemsa. Three slides were prepared for each fish. Each slide was examined under a light microscope in triplicate.