Closer to reality--the influence of toxicity test modifications on the sensitivity of Gammarus roeseli to the insecticide imidacloprid

Ecotoxicology and Environmental Safety
R BöttgerS Mohr

Abstract

Laboratory toxicity test designs are far from reality and therefore extrapolations to field situations may be more difficult. In laboratory experiments with the amphipod Gammarus roeseli exposed to the insecticide imidacloprid it was investigated if test conditions closer to reality influences its sensitivity and if it is possible to extrapolate results from these laboratory tests to results from a stream mesocosm study. Experiments were run by varying medium, temperature, size, and seasonal origin of gammarids. Age and seasonal aspects had strongest effects with juveniles and animals taken from a spring population being most sensitive with an EC₅₀ (96 h) of 14.2 μg L⁻¹ imidacloprid. The test designs closest to the conditions in the stream mesocosms reflected best the results in mesocosms study on basis of LOEC values. However, the EC(x) extrapolation failed to predict the effects of short term imidacloprid pulses in the field.

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Citations

May 28, 2015·Environmental Science and Pollution Research International·Domenico DavolosElvira De Matthaeis
Feb 28, 2013·Environmental Toxicology and Chemistry·Ivo RoessinkPaul J Van den Brink
Jan 1, 2014·Environmental Toxicology and Chemistry·Annika AgatzColin D Brown

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