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Mouthparts of Southern Leopard Frog, Lithobates sphenocephalus, Tadpoles not Affected by Exposure to a Formulation of Glyphosate

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Abstract

This study evaluated the impacts of Roundup® on tadpole mouthpart damage as a mechanism for reduced growth and developmental rates in Lithobates sphenocephalus (Southern leopard frog) tadpoles. We did not find evidence that Roundup® damages larval mouthparts, nor was there a significant relationship between mouthpart damage and either body condition or developmental rate. However, the highest concentration of Roundup® significantly stunted development compared to all other treatments. Although we observed a significant effect of Roundup® on developmental rate, we conclude that mouthpart damage is likely not a mechanism for this life history response.

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Acknowledgments

We thank Forrest Brem for assisting with the experiment and Michelle Boone, Emily Elderbrock, Nick Hobbs, Matt Venesky, and Chris Vlautin for reviewing this manuscript. Collection permits from TN were obtained prior to collecting the animals used in these experiments, and all experimental procedures were approved by the University of Memphis IACUC. This research was funded in part by an Ecological Research Center Grant-in-Aid of research granted to S.M.H.

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Authors and Affiliations

  1. Department of Biological Sciences, University of Memphis, Memphis, TN, 38152-353, USA

    Shane M. Hanlon, Kyle J. Lynch & Matthew J. Parris

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  1. Shane M. Hanlon
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  2. Kyle J. Lynch
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  3. Matthew J. Parris
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Correspondence to Shane M. Hanlon.

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Hanlon, S.M., Lynch, K.J. & Parris, M.J. Mouthparts of Southern Leopard Frog, Lithobates sphenocephalus, Tadpoles not Affected by Exposure to a Formulation of Glyphosate. Bull Environ Contam Toxicol 91, 611–615 (2013). https://doi.org/10.1007/s00128-013-1117-1

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  • DOI: https://doi.org/10.1007/s00128-013-1117-1

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