Behavioural sensitivity of a key Southern Ocean species (Antarctic krill, Euphausia superba) to p,p'-DDE exposure

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Title Behavioural sensitivity of a key Southern Ocean species (Antarctic krill, Euphausia superba) to p,p'-DDE exposure
Author Poulsen, A.; King, C.; King, R. A.; Bengtson Nash, Susan
Journal Name Ecotoxicology and Environmental Safety
Year Published 2012
Place of publication United States
Publisher Academic Press
Abstract Persistent organic pollutants (POPs) have been frequently measured throughout the Southern Ocean food web for which little information is available to assess the potential risks of POP exposure. The current study evaluated the toxicological sensitivity of a key Southern Ocean species, Antarctic krill, to aqueous exposure of p,p0-dichlorodiphenyl dichloroethylene (p,p0-DDE). Behavioural endpoints were used as indicators of sublethal toxicity. Immediate behavioural responses (partial immobility and tail flicking) most likely reflect neurotoxicity, while the p,p0-DDE body residue causing a median level of sublethal toxicity in Antarctic krill following 96 h exposure (IEC50sublethal toxicity¼3.970.21 mmol/kg lipid weight) is comparable to those known to cause sublethal narcosis in temperate aquatic species. Critical body residues (CBRs) were more reproducible across tests than effective seawater concentrations. These findings support the concept of the CBR approach, that effective tissue residues are comparable across species and geographical ranges despite differences in environmental factors.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1016/j.ecoenv.2011.09.005
Volume 75
Issue Number 1
Page from 163
Page to 170
ISSN 0147-6513
Date Accessioned 2011-11-16; 2012-07-13T05:17:03Z
Date Available 2012-07-13T05:17:03Z
Research Centre Atmospheric Environment Research Centre
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Environmental Sciences
URI http://hdl.handle.net/10072/45866
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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