4 Works

Data from: Evolved pesticide tolerance influences susceptibility to parasites in amphibians

Jessica Hua, Vanessa P. Wuerthner, Devin K. Jones, Brian Mattes, Rickey D. Cothran, Rick A. Relyea & Jason T. Hoverman
Because ecosystems throughout the globe are contaminated with pesticides, there is a need to understand how natural populations cope with pesticides and the implications for ecological interactions. From an evolutionary perspective, there is evidence that pesticide tolerance can be achieved via two mechanisms: selection for constitutive tolerance over multiple generations or by inducing tolerance within a single generation via phenotypic plasticity. While both mechanisms can allow organisms to persist in contaminated environments, they might result...

Effects of density on the strength of sexual selection in the lab and in nature in an undescribed amphipod species

Rickey Cothran
There is a growing effort to understand how sexual selection varies over space and time under different ecological conditions and how this can maintain variation in sexual traits. An interesting ecological condition is population density, which can either increase or decrease sexual selection depending on the natural history of the species. We examined sexual and natural selection in an undescribed amphipod species (Hyalella sp.) using surveys of two natural populations that increase in density from...

Data from: The contribution of phenotypic plasticity to the evolution of insecticide tolerance in amphibian populations

Jessica Hua, Devin K. Jones, Brian M. Mattes, Rickey D. Cothran, Rick A. Relyea & Jason T. Hoverman
Understanding population responses to rapid environmental changes caused by anthropogenic activities, such as pesticides, is a research frontier. Genetic assimilation (GA), a process initiated by phenotypic plasticity, is one mechanism potentially influencing evolutionary responses to novel environments. While theoretical and laboratory research suggests that GA has the potential to influence evolutionary trajectories, few studies have assessed its role in the evolution of wild populations experiencing novel environments. Using the insecticide, carbaryl, and 15 wood frog...

Data from: Carotenoids and amphibians: effects on life history and susceptibility to the infectious pathogen, Batrachochytrium dendrobatidis

Rickey D. Cothran, Stephanie S. Gervasi, Cindy Murray, Beverly J. French, Paul W. Bradley, Jenny Urbina, Andrew R. Blaustein & Rick A. Relyea
Carotenoids are considered beneficial nutrients because they provide increased immune capacity. Although carotenoid research has been conducted in many vertebrates, little research has been done in amphibians, a group that is experiencing global population declines from numerous causes, including disease. We raised two amphibian species through metamorphosis on three carotenoid diets to quantify the effects on life-history traits and post-metamorphic susceptibility to a fungal pathogen (Batrachochytrium dendrobatidis; Bd). Increased carotenoids had no effect on survival...

Registration Year

  • 2023
  • 2017
  • 2015

Resource Types

  • Dataset


  • Southwestern Oklahoma State University
  • Rensselaer Polytechnic Institute
  • Purdue University
  • Binghamton University
  • Oregon State University
  • University of Pittsburgh
  • University of South Florida