Acute toxicity of toluene, hexane, xylene, and benzene to the rotifers Brachionus calyciflorus and Brachionus plicatilis.

摘要: A large number of studies on the biological effects oil pollution in aquatic environment deal with whole crude or refined oils their water-soluble fractions. However, low boiling, aromatic hydrocarbons, which are probably most toxic constituents oil, have until now not been examined sufficient detail. Toluene, benzene and xylene, constitute a major component various oils. They may be readily lost by weathering but waters that relatively stagnant chronically polluted. Korn et al. stated toluene is more than many other hydrocarbons such as benzene, though latter water-soluble. Report exposure to organic solvents like hexane still limited although well-known group neurointoxicants. Various derivates continue used chemical intermediates, solvents, pesticides, so on, spite incomplete knowledge chronic toxicity. The majority toxicity about organisms under controlled conditions either fish cladoceran Daphnia magna there few reported using rotifers. herbicides population variables laboratory rotifer cultures havemore » investigated. Rotifers one main sources zooplankton production they an important ecological significance environment. present work was designed investigate effect short-term some petroleum might expected occur immediately oil-slick, freshwater brackish 18 refs., 1 tab.« less