Flow-through toxicity tests were conducted on common freshwater fishes: rainbow trout (Oncorhynchus mykiss), three-spined stickleback (Gasterosteus aculeatus), roach (Rutilus rutilus), perch (Perca fluviatilis) and dace (Leuciscus leuciscus), to estimate their sensitivity to acute toxicity of nickel. The 96-hour median lethal concentration (96-hour LC50) values obtained from the tests ranged fr...

Acute toxicity tests were performed over a period of 120 hours using different concentrations of effluent of treated rubber wood processing wastewater on freshwater fish, Poecilia reticulata. The LC50 values of the effluent exposed to P. reticulata for 24, 48, 72, 96 and 120 hours were 19.77, 19.55, 19.25, 18.99 and 18.75 ml/dl respectively. Mortality was observed in a dose dependant manner. Th...

The hardness-based regulatory approach for Cu prescribes an extrapolation of the toxicity-versus-hardness relationship to low hardness (< or =50 mg/L as CaCO3). Hence, the objective of the present research was to evaluate the influences of water quality on acute Cu toxicity to larval fathead minnow (Pimephales promelas) in low-hardness surface waters. Seasonal water sampling was conducted at 24...

The use of the insecticide fipronil has dramatically increased in recent years, yet few studies have been performed compared to other popular pesticides. Although fipronil binds readily to organic carbon in soil, past studies have focused on fipronil toxicity in water but not the effects of fipronil toxicity in sediment. This study addresses the need for a broader range in fipronil toxicity res...

stachys lavandulifolia is used as the herbal tea and its wide and potent medical effects have been reported for the extract in animal studies. this study aimed to find the safety profile of the extract to find the appropriate doses for further human studies. the aerial parts of the plant were air-dried and the hydroalcoholic extract was obtained and concentrated by percolation method with 140 m...

Toxicity tests are commonly used as a tool to determine the standards of water quality for chemicals and to discover appropriate organisms as bioindicators in toxicological studies, and also could be used as an essential tool for evaluation of the pollutant effects in aquatic ecosystems. The aim of the present study was to evaluate the sensitivity of two Caspian fish species, Caspian trout as a...

Acute toxicity tests for the pesticides endosulfan and malathion on the larvae of Chironomus ramosus were conducted. Median Lethal Concentration (LC50) values of endosulfan were 0.55 x 10(-2), 0.16 x 10(-2), 0.089 x 10(-2) and 0.036 x 10(-2) ppb respectively, while those for malathion were 0.139 x 10(-2), 0.054 x 10(-2), 0.019 x 10(-2) and 0.0032 x 10(-2) ppb respectively, at 24, 48, 72 and 96 ...

Introduction: Bioassay is necessary for assessment of pollution. Because physical and chemical taste are not enough for assessment of potential effects on water ecosystem. Bioassay tests have alot of scientific value inanition doing of them is easy and need less time, also need less space, laboratory equipment’s and expenditure. Therefor such tests have found special attention in water pollutio...

During desert locust plagues large amounts of insecticides are used for control operations. Drift from these treatments and accidental overspraying may contaminate small surface waters such as temporary ponds. The present study describes methods for static acute toxicity tests with two abundant organisms that occur in temporary ponds in the African Sahel region: the fairy shrimp Streptocephalus...

Mondal P., Mollah A. R. and Rahman M. M. 2008. Study on the Acute Toxicity of Chlorocid 20 EC to Tubifex sp. Lamarck, 1816. J .Soil .Nature. 2(3): 20-25 Static bioassay tests were conducted to assess the acute toxicity of chlorocid 20 Emulsified Concentration (EC) to Tubifex sp. Lamarck, 1816 during March to August 2006 in the Zoological Garden at Carzon hall campas of the Dhaka University. Tub...