NDLI: Toxicokinetic variation in 15 freshwater arthropod species exposed to the insecticide chlorpyrifos.

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Toxicokinetic variation in 15 freshwater arthropod species exposed to the insecticide chlorpyrifos.

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Toxicokinetic variation in 15 freshwater arthropod species exposed to the insecticide chlorpyrifos.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Rubach, Mascha N. Ashauer, Roman Maund, Stephen J. Baird, Donald J. Van den Brink, Paul J.
Description	Country affiliation: Netherlands Author Affiliation: Rubach MN ( Alterra, Wageningen University and Research Centre, 6700 AA Wageningen, The Netherlands. mrubach@fastmail.fm)
Abstract	Recent advances in modeling the processes of the toxicity of chemicals-toxicokinetics (TK) and toxicodynamics (TD)-are improving environmental risk assessment (ERA) through prediction of effects from time-varying exposure. This has been achieved by linking chemical fate and toxicological effects mechanistically, based on internal concentrations, through the tissue residue approach. However, certain questions remain: for example, how do TK and TD differ among species and how does this relate to differences in species sensitivity? In a series of experiments, we studied the TK of [(14)C]chlorpyrifos in 15 freshwater arthropod species, two of which were studied in juvenile and adult life stages. Uptake (k(in)) and elimination (k(out)) rate constants were fitted using a one-compartment single first-order kinetic model. The application of two complementary parameter estimation methods facilitated the calculation of bioconcentration factors (BCF) with prediction intervals and 95% depuration times (t(95)) for all tested species. Extremely slow elimination was observed in some species as well as high overall variation in k(in), k(out), BCF, and t(95) across the tested aquatic arthropod species. This variation has implications for the development of TKTD approaches in ERA, including assessing fluctuating exposure concentrations and the interpretation of observed toxicity responses in the laboratory and in the field.
File Format	HTM / HTML
ISSN	07307268
Issue Number	10
Volume Number	29
e-ISSN	15528618
Journal	Environmental Toxicology and Chemistry
Language	English
Publisher	Wiley
Publisher Date	2010-10-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chlorpyrifos Research Support, Non-u.s. Gov't Risk Assessment Species Specificity Toxicity Discipline Environmental Health Discipline Toxicology Insecticides Metabolism Drug Effects Journal Article Animals Classification Arthropods Discipline Chemistry Scintillation Counting Pharmacokinetics Carbon Radioisotopes
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Health, Toxicology and Mutagenesis

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