Journal
WATER RESEARCH
Volume 35, Issue 10, Pages 2347-2352Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0043-1354(00)00537-6
Keywords
ethinylestradiol; bisphenol A; Gammarus pulex; survival; reproductive behaviour; precopulatory guarding
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The effects of the xenoestrogens ethinyrestradiol (EE) and bisphenol A (BPA) on the survival and reproductive behaviour of the amphipod Gammarus pulex were determined in a series of bioassays. Acute toxicity of the test chemicals was determined under static conditions, revealing 10d median lethal concentrations (LC50s) of 0.84 and 1.49mg/L for EE and BPA, respectively. Several aspects of the reproductive behaviour including the ability of males and females to detect each other, form precopulatory guarding pairs and to continue the guarding behaviour, were examined during a 24 h exposure period over a wide range of concentrations. However, reproductive behaviour was only disrupted at relatively high concentrations where it would be unrealistic to attribute the effects to an endocrine mediated process. Consequently, changes in precopulatory guarding resulting from acute exposure, do not seem to be suitable For detecting the presence in water of xenoestrogens known to cause endocrine disruption in vertebrates. (C) 2001 Elsevier Science Ltd. All rights reserved.
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