Premium
The Accumulation of DDT by the Dragonfly Nymph, Tetragoneuria
Author(s) -
Wilkes Frank G.,
Weiss Charles M.
Publication year - 1971
Publication title -
transactions of the american fisheries society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.696
H-Index - 86
eISSN - 1548-8659
pISSN - 0002-8487
DOI - 10.1577/1548-8659(1971)100<222:taodbt>2.0.co;2
Subject(s) - dragonfly , nymph , biology , zoology , odonata
Final instar Tetragoneuria spp. dragonfly nymphs were exposed to sublethal concentrations of DDT dispersed in water. Uniformly labeled DDT‐C 14 was employed. The activity of the DDT‐C 14 accumulated by the nymphs and of the DDT‐C 14 in the exposure water was measured by the liquid scintillation counting technique. The accumulation of DDT from aqueous solution by both live and dead nymphs as a function of DDT concentration and exposure time was determined. The DDT accumulation of the live nymphs increased exponentially with increased concentration at a given exposure time. At a given concentration, accumulation increased with increased exposure time. The DDT accumulation of the live nymphs greatly exceeded that of the dead nymphs at the higher DDT concentrations studied. The results of this investigation indicate that both biological and physical mechanisms contribute to DDT uptake by this organism and that rates of uptake by these mechanisms are concentration dependent.