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Which traits do observers use to distinguish Batesian mimics from their models?

Taylor, Christopher H.; Warrin, Jonathan; Gilbert, Francis; Reader, Tom

Authors

Jonathan Warrin jonathan.warrin@btinternet.com

TOM READER tom.reader@nottingham.ac.uk
Associate Professor



Abstract

Batesian mimicry, in which a harmless mimic resembles a more aversive model, can encompass a wide range of morphological traits, but the resemblance is never perfect. Previous studies have used abstract “prey” designs to show that differences in certain traits may not be relevant to mimicry if they are not perceived or recognized by a predator. Here, we extend these results by examining how human “predators” respond to realistic variation in traits of aposematic wasps and their hoverfly mimics. We measured the ability of humans to discriminate between images of wasps and hoverflies in which only certain traits were visible, to determine the contributions of those traits to discrimination decisions. We found that shape is a particularly useful and easily learnt trait for separating the two taxa. Subjects did not successfully discriminate on the basis of abdominal patterns, despite those containing useful information. Color similarity between wasps and hoverflies is relatively high in comparison with other traits, suggesting that selection has acted more strongly on color. Our findings demonstrate the importance of consideration of natural variation in the traits of prey and their salience to predators for understanding the evolution of prey defenses.

Journal Article Type Article
Journal Behavioral Ecology
Print ISSN 1045-2249
Electronic ISSN 1465-7279
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
Volume 28
Issue 2
APA6 Citation Taylor, C. H., Warrin, J., Gilbert, F., & Reader, T. (in press). Which traits do observers use to distinguish Batesian mimics from their models?. Behavioral Ecology, 28(2), https://doi.org/10.1093/beheco/arw166
DOI https://doi.org/10.1093/beheco/arw166
Publisher URL http://beheco.oxfordjournals.org/content/early/2016/12/20/beheco.arw166.short
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf
Additional Information This is a pre-copyedited, author-produced version of an article accepted for publication in Behavioral Ecology following peer review. The version of record, Christopher H. Taylor, Jonathan Warrin, Francis Gilbert, and Tom Reader
Which traits do observers use to distinguish Batesian mimics from their models? Behavioral Ecology first published online December 20, 2016 doi:10.1093/beheco/arw166 is available online at: http://beheco.oxfordjou...016/12/20/beheco.arw166

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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