Toxicity of glyphosate-based pesticides to four North American frog species

DOI PDF Web Site 被引用文献2件
  • Christina M. Howe
    Department of Biology, Trent University, Peterborough, Ontario K9J 7B8, Canada
  • Michael Berrill
    Department of Biology, Trent University, Peterborough, Ontario K9J 7B8, Canada
  • Bruce D. Pauli
    Canadian Wildlife Service, National Wildlife Research Centre, Carleton University, Ottawa, Ontario K1A 0H3
  • Caren C. Helbing
    Department of Biochemistry and Microbiology, University of Victoria, P.O. Box 3055 STN CSC, Victoria, British Columbia V8W 3P6, Canada
  • Kate Werry
    Department of Biochemistry and Microbiology, University of Victoria, P.O. Box 3055 STN CSC, Victoria, British Columbia V8W 3P6, Canada
  • Nik Veldhoen
    Department of Biochemistry and Microbiology, University of Victoria, P.O. Box 3055 STN CSC, Victoria, British Columbia V8W 3P6, Canada

書誌事項

公開日
2004-08-01
権利情報
  • https://academic.oup.com/pages/standard-publication-reuse-rights
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1897/03-71
公開者
Oxford University Press (OUP)

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説明

<jats:title>Abstract</jats:title> <jats:p>Gyphosate-basedherbicides are among the most widely used pesticides in the world. We compared the acute toxicity of the glyphosate end-use formulation Roundup Original® to four North American amphibian species (Rana clamitans, R. pipiens, R. sylvatica, and Bufo americanus) and the toxicity of glyphosate technical, the polyethoxylated tallowamine surfactant (POEA) commonly used in glyphosate-based herbicides, and five newer glyphosate formulations to R. clamitans. For R. clamitans, acute toxicity values in order of decreasing toxicity were POEA &gt; Roundup Original &gt; Roundup Transorb® &gt; Glyfos AU®; no significant acute toxicity was observed with glyphosate technical material or the glyphosate formulations Roundup Biactive®, Touchdown®, or Glyfos BIO®. Comparisons between the four amphibian species showed that the toxicity of Roundup Original varied with species and developmental stage. Rana pipiens tadpoles chronically exposed to environmentally relevant concentrations of POEA or glyphosate formulations containing POEA showed decreased snout-vent length at metamorphosis and increased time to metamorphosis, tail damage, and gonadal abnormalities. These effects may be caused, in some part, by disruption of hormone signaling, because thyroid hormone receptor β mRNA transcript levels were elevated by exposure to formulations containing glyphosate and POEA. Taken together, the data suggest that surfactant composition must be considered in the evaluation of toxicity of glyphosate-based herbicides.</jats:p>

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