Biased generalization of salient traits drives the evolution of warning signals.

ABSTRACT: The importance of receiver biases in shaping the evolution of many signalling systems is widely acknowledged. Here, we show that receiver bias can explain which traits evolve to become warning signals. For warning coloration, a generalization bias for a signalling trait can result from predators learning to discriminate unprofitable from profitable prey. However, because the colour patterns of prey are complex traits with multiple components, it is crucial to understand which of the many aspects of prey appearance evolve into signals. We provide experimental evidence that the more salient differences in prey traits give rise to greater generalization bias, corresponding to stronger selection towards trait exaggeration. Our results are based on experiments with domestic chickens as predator

SUBMITTER: Gamberale-Stille G 

PROVIDER: S-EPMC5936731 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature