Effecy of parathion-methyl on Amazonian fish and freshwater invertebrates: A comparison of sensivity with temperate data

A. Rico Artero, R. Geber, P. Campos Souto, M.V.B. Garcia, P.J. van den Brink

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34 Citations (Scopus)


Parathion-methyl is an organophosphorous insecticide that is widely used in agricultural production sites in the Amazon. The use of this pesticide might pose a potential risk for the biodiversity and abundance of fish and invertebrate species inhabiting aquatic ecosystems adjacent to the agricultural fields. Due to a lack of toxicity data for Amazonian species, safe environmental concentrations used to predict the ecological risks of parathion-methyl in the Amazon are based on tests performed with temperate species, although it is unknown whether the sensitivity of temperate species is representative for those of Amazonian endemic species. To address this issue, the acute toxic effect (LC50–96 h) of parathion-methyl was assessed on seven fish and five freshwater invertebrate species endemic to the Amazon. These data were used to compare their pesticide sensitivity with toxicity data for temperate species collected from the literature. The interspecies sensitivity was compared using the Species Sensitivity Distribution (SSD) concept. The results of this study suggest that Amazonian species are no more, or less, sensitive to parathion-methyl than their temperate counterparts, with LC50 values ranging from 2900 to 7270 µg/L for fish and from 0.3 to 319 µg/L for freshwater arthropods. Consequently, this evaluation supports the initial use of toxicity data of temperate fish and freshwater invertebrate species for assessing the effects of parathion-methyl on Amazonian freshwater ecosystems.
Original languageEnglish
Pages (from-to)765-771
JournalArchives of Environmental Contamination and Toxicology
Issue number3
Publication statusPublished - 2010


  • risk-assessment
  • aquatic ecosystems
  • ecological risk
  • distributions
  • pesticides
  • ecotoxicology
  • toxicity
  • thailand
  • america
  • brazil


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