Confirming the species-sensitivity distribution concept for Endosulfan using laboratory, mesocosm and field data

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Journal Article
Archives of Environmental Contamination and Toxicology, 2004, 47 (4), pp. 511 - 520
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In Australia, water-quality trigger values for toxicants are derived using protective concentration values based on species-sensitivity distribution (SSD) curves. SSD curves are generally derived from laboratory data with an emphasis on suing local site-specific data. In this study, Australian and non-Australian laboratory-species based SSD curves were compared and the concept of species protection confirmed by comparison of laboratory-based SSD curves with local mesocosm experiments and field monitoring data. Acute LC50 data for the organochlorine pesticide endosulfan were used for these comparisons: SSD curves were fitted using the Burr type III distribution. SSD curves indicated that the sensitivities of Australian fish and arthropods were not significantly different from those corresponding non-Australian taxa. Arthropod taxa in the mesocosm were less sensitive than taxa in laboratory tests, which suggests that laboratory-generated single-species data may be used to predict concentrattions protective of semifield (mesocosm) systmes. SSDs based on laboratory data were also protective of field populations.
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