Behavioural sensitivity of a key Southern Ocean species (Antarctic krill, Euphausia superba) to p,p'-DDE exposure
Author(s)
Poulsen, Anita H
Kawaguchi, So
King, Catherine K
King, Robert A
Nash, Susan M Bengtson
Griffith University Author(s)
Year published
2012
Metadata
Show full item recordAbstract
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 ...
View more >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 toxicity쳮970.21 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.
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View more >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 toxicity쳮970.21 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.
View less >
Journal Title
Ecotoxicology and Environmental Safety
Volume
75
Issue
1
Subject
Chemical sciences
Environmental sciences
Other environmental sciences not elsewhere classified
Biomedical and clinical sciences