Clonal variation in acetylcholinesterase biomarkers and life history traits following OP exposure in Daphnia magna

Ecotoxicology and Environmental Safety
Liane Biehl PrintesAmanda Callaghan

Abstract

Two clones of Daphnia magna (Standard and Ruth) were exposed for 7 days to sub-lethal concentrations of acephate (5.0 and 10.0 mg/L). Survivorship, individual growth, reproduction and the population growth rate (lambda) were evaluated over three weeks. Acetylcholinesterase (AChE) activity was measured on days 2, 7 and 21. Acephate exposure inhibited AChE activity but had no direct effect on life history (LH) traits. There was also no effect of clone on AChE activity, LH and lambda. However, a significant interaction between clone and acephate concentration was found on both fecundity and lambda. AChE inhibition at 48 h was associated with a decrease in lambda in the Standard clone and an increase in lambda in clone Ruth. Therefore, our findings show that genotypic variation will influence the link between AChE activity and toxic effects at higher levels of biological organisation in D. magna.

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Citations

Dec 12, 2013·Environmental Science and Pollution Research International·R RochaB Nunes
Feb 11, 2014·Ecotoxicology and Environmental Safety·Emanuela Cristina FreitasOdete Rocha
Feb 28, 2015·Aquatic Toxicology·I VaróJ C Navarro
Apr 4, 2013·Journal of Zhejiang University. Science. B·Yan-xia YangShao-nan Li
Nov 11, 2015·Ecological Applications : a Publication of the Ecological Society of America·Bharath AnanthasubramaniamRoger M Nisbet
Jul 28, 2011·Journal of Environmental Sciences (China)·Shaonan Li, Yajun Tan

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