Congratulations to Dr. Dorota Paczesniak, recipient of the 2020 Fisher Prize for her paper, “Parasite resistance predicts fitness better than fecundity in a natural population of the freshwater snail Potamopyrgus antipodarum.” The R. A. Fisher Prize is awarded annually by the Society for the Study of Evolution for an outstanding Ph.D. dissertation paper published in an issue of the journal Evolution during a given calendar year. The award comes with a $1000 honorarium.