Mouthparts of southern leopard frog, Lithobates sphenocephalus, tadpoles not affected by exposure to a formulation of glyphosate.
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.
Department of Biological Sciences, University of Memphis, Memphis, TN, 38152-353, USA, hanloc2107@gmail.com.
Shane M
SM
Hanlon
Kyle J
KJ
Lynch
Matthew J
MJ
Parris
D000818:Animals; D005998:Glycine / Q000031:analogs & derivatives* / Q000633:toxicity; D006540:Herbicides / Q000633:toxicity*; D007814:Larva / Q000502:physiology; D009055:Mouth / Q000187:drug effects*; D011894:Rana pipiens / Q000502:physiology; D014874:Water Pollutants, Chemical / Q000633:toxicity; D000097797:Glyphosate
D005998:Glycine; D006540:Herbicides; D014874:Water Pollutants, Chemical; D000097797:Glyphosate