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21 April 2017 Exposure to the Herbicide Atrazine Nonlinearly Affects Tadpole Corticosterone Levels
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Abstract
To determine whether the herbicide, atrazine, affects the stress hormone corticosterone, we exposed Osteopilus septentrionalis (Cuban Treefrog) tadpoles to four concentrations of atrazine and two controls (water and acetone) for three time durations (4, 28, and 100 h). Atrazine concentration, but not exposure duration, had significant nonlinear effects on whole-body corticosterone. Relative to controls, intermediate concentrations of atrazine (10.2 and 50.6 μg/L) tended to lower corticosterone, whereas the lowest (0.1 μg/L) and highest atrazine concentrations (102 μg/L) elevated corticosterone. These results indicate that atrazine exposure might dysregulate corticosterone, a hormone integral to vertebrate immunity, neurogenesis, and health.
Copyright 2017 Society for the Study of Amphibians and Reptiles
Taegan A. McMahon, Raoul K. Boughton, Lynn B. Martin and Jason R. Rohr "Exposure to the Herbicide Atrazine Nonlinearly Affects Tadpole Corticosterone Levels," Journal of Herpetology 51(2), (21 April 2017). https://doi.org/10.1670/16-126
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