Does increased heat resistance result in higher susceptibility to predation? A test using Drosophila melanogaster selection and hardening
S Hangartner, I Dworkin, M Denieu, AA Hoffmann
Journal of Evolutionary Biology | Wiley | Published : 2017
Heat resistance of ectotherms can be increased both by plasticity and evolution, but these effects may have trade‐offs resulting from biotic interactions. Here, we test for predation costs in Drosophila melanogaster populations with altered heat resistance produced by adult hardening and directional selection for increased heat resistance. In addition, we also tested for genetic trade‐offs by testing heat resistance in lines that have evolved under increased predation risk. We show that while 35/37 °C hardening increases heat resistance as expected, it does not increase predation risk from jumping spiders or mantids; in fact, there was an indication that survival may have increased under pre..View full abstract
Awarded by Swiss National Science Foundation
We thank Ronald Lee for collecting the flies and Lea Rako, Jennifer Shirriffs, Fernando Diaz, Kelly Richardson, Anjali Goundar and Yoshinori Endo for support with rearing of the laboratory lines. This research was funded by the Swiss National Science Foundation (PBEZP3_140043 and PA00P3_145372 to SH) and by the Australian Research Council and the CSIRO Science Industry Endowment Fund (to AAH) and by a National Science and Engineering Research Council of Canada Discovery award (to ID). The authors declare no conflict of interest.