||Acute and Chronic Parathion Toxicity to Fish and Invertebrates.
Spacie., Anne ;
||National Water Quality Lab., Duluth, Minn.;Environmental Protection Agency, Washington, D.C. Office of Research and Monitoring.
Phosphorus organic compounds ;
Aquatic biology ;
Water pollution ;
Nervous system ;
Lethal dosage ;
Pesticide residues ;
Water pollution effects(Animals) ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||The research demonstrates that parathion is highly toxic to aquatic species, may accumulate in tissues, and may persist long enough to cause chronic damage. To find ecologically 'safe' levels allowable in aquatic systems, the long-term effects of parathion must be studied further. The objective of the present study was to find the greatest chronic levels of parathion that produce no harmful effects to brook trout, bluegills, fathead minnows, Daphnia magna, Gammarus fasciatus, and Chrionomus tentans. For each species, the maximum acceptable toxicant concentration (MATC), defined by Mount and Stephan, was then related to the acute LC50. Because standardized bioassay techniques were used, the results of these tests may be correlated with those for other species and compounds.
|PUB Date Free Form
||6T; 6F; 57Y; 57H; 68E; 68D; 98F
||PC A06/MF A01