The aquatic ecotoxic profile of the fungicide pyrimethanil and its acute and chronic thermal dependence in two aquatic invertebrates Chironomus riparius and Daphnia magna were investigated. The ecotoxicity of pyrimethanil at optimal thermal conditions did not depend on the trophic level, but was species-specific. The acute pyrimethanil-toxicity on C. riparius increased with higher temperature. ...

A monitoring system was used to examine the behavioral response of fathead minnows (Pimephales promelas) to plumes of the polycyclic aromatic hydrocarbon fluoranthene. Previously unexposed fish and fish surviving acute exposure to fluoranthene were presented with three different concentrations of fluoranthene. Both groups of fish avoided fluoranthene. Pre-exposure did not enhance or diminish av...

The spill of Crude oil from artisanal refineries and government owned pipelines has become recurrent situation in the Niger Delta, leading to devastating effects on aquatic ecosystem. toxicity NNPC (Nigerian National Petroleum Corporation) refinery selected Bolo, Twon-Brass Ekpemu Delta were investigated. physicochemical properties products short fall standards for refineries, as they contained...

widespread use of pharmaceuticals has resulted in mixture concentrations ranging from mg/l in effluent to µg/l concentrations in surface water. in a 2008 study, 13 pharmaceuticals, ranging in amounts from 0.0028 to 0.1757 µg/l, were identified in the tennessee river, usa and its tributaries. in order to address the need for risk assessment of environmentally relevant pharmaceutical mixtures, da...

The aim of this study was to investigate the effects of subchronic exposure to atrazine on fish growth and the development of histopathological changes in selected organs (gill, kidney, liver) in Danio rerio. Juvenile growth tests were performed on D. rerio according to OECD method No. 215. For 28 days, fish at an initial age of 30 days were exposed to the environmental atrazine concentration c...

The toxic effects of Lindane (γ-BHC) on Microcystis aeruginosa were studied under lab culture conditions. Total protein levels, as well malondialdehyde (MDA) levels and superoxide dismutase (SOD) enzyme activity, in algal cells, determined after exposure to different concentrations Lindane. bioaccumulation Lindane, the influence pH dissolved organic matter (DOM) effects, was also evaluated cell...

The objectives of this study were to provide data that can be used to predict exposure-based effects of RDX in aged soil on multiple endpoint organisms representing two trophic levels. These data can be used for defining criteria or reference values for environmental management and conducting specific risk assessment. Dose-response experiments formed the basis for the evaluation of toxic effect...

Abstract The triazine herbicide atrazine is routinely detected in freshwaters, and has also been coastal waters Europe the US. Relatively few studies have conducted with estuarine/marine invertebrates. This study sought to contribute additional invertebrate toxicity data using model species, Eastern oyster ( Crassostrea virginica ) Mysid shrimp Americamysis bahia ). Specifically, we investigate...