Biologically Active Compounds in the Aquatic Environment: The Uptake and Distribution of [1,1‐dichloro‐2,2‐bis (p‐chlorophenyl) ethylene], DDE by Chironomus tentans Fabricius (Diptera: Chironomidae)

摘要: Abstract The midge, Chironomus tentans, was exposed from egg through adult to varying concentrations (.07 2.2 ppb) of [1,1-dichloro-2,2-bis(p-chlorophenyl) ethylene], DDE. amount DDE accumulated by the midge determined gas-liquid chromatography. accumulation aqueous solution and contaminated substrate as a function concentration exposure time determined, distribution residue quantitated (pupa, exuvia, adult, mass). No attempt made differentiate between these two modes uptake (water or substrate). demonstrated dose-dependent relationship, accumulating exponentially with increased at given time. At any in water, On ppm basis midges concentrated approximately 20,000 times over that level which present water. exuvia did not de...