Two freshwater fishes, Rasbora sumatrana (Cyprinidae) and Poecilia reticulata (guppy) (Poeciliidae) were exposed for a four-day period in the laboratory condition to a range of copper (Cu) and cadmium (Cd) concentrations. Mortality was assessed and median lethal concentrations (LC50) were calculated. LC50 increased with decrease in mean exposure times for both metals. For R. sumatrana, LC50s fo...

Guava (Psidium guajava L.), is adapted to an extensive range of soils, however, its development is strongly affected by salinity. Environmental stresses are of the major and influential factors in the amount of secondary metabolites, especially phenolic compounds present in plants. The purpose of this investigation was to study the leaf antioxidant and flavonoid contents (catechin, quercetin an...

Juvenile common carp (Cyprinus carpio) were used as a model to investigate acute toxicity and oxidative stress caused by silver nanoparticles (Ag-NPs). The fish were exposed to different concentrations of Ag-NPs for 48 h and 96 h. After exposure, antioxidant enzyme levels were measured, including glutathione-S-transferase (GST), superoxidase dismutase, and catalase (CAT). Other biochemical para...

Macrophyte communities play an essential role in the way freshwater ecosystems function. It is thus of great concern to understand how environmental factors, especially anthropogenic ones, influence their composition and diversity. The aim of this study was to examine whether the effects of a herbicide mixture (50% atrazine, 35% isoproturon, 15% alachlor) on single macrophyte species can be use...

Swimming is a physical activity that accessible to people of all ages in four seasons. However, continuous organic and inorganic precursor load disinfectant dosing make pool water chemistry much more complex than other disinfected waters. Carcinogenic bromate compound one the hundreds disinfection by-products water. The occurrence waters depends on content filling water, process, operating para...

a series of specific toxicological effects including bioaccumulation of the pollutant, histological changes and influences on liver tissue were examined in the roach fish (rutilus rutilus) after the exposure to graded sublethal concentrations (10 , 30 , 50 μg hg/l) of mercury chloride (mc). histopathological changes, such as oedema, vacuolization, pyknotic nucleus, telangiectasis, and degenerat...