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Predator learning differences affect the survival of chemically defended prey

Rowland, HM; Fulford, AJT; Ruxton, GD; (2017) Predator learning differences affect the survival of chemically defended prey. Animal Behaviour , 124 pp. 65-74. 10.1016/j.anbehav.2016.11.029. Green open access

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Abstract

Prey animals that possess chemical defences often advertise their unprofitability to predators by a distinctive and conspicuous visual appearance known as aposematism. However, not all chemically defended species are conspicuous, and some are nearly cryptic. Differences in predator community composition and predator behaviour may explain varied levels of prey conspicuousness. We tested this hypothesis by measuring dietary wariness and learning behaviour of day-old chickens, Gallus gallus domesticus, from four strains of laying hens that have been selected for different levels of egg productivity. We used these strains as model predators to test whether predators that vary in the trade-offs associated with foraging behaviour cause differential survival of chemically defended prey with conspicuous signals. We found that strains differed in how they learned about chemically defended prey, which resulted in significant differences in prey survival. The selection pressures imposed by different types of predator could explain whether chemically defended prey evolve varied levels of conspicuousness. Predators' initial wariness of novel prey was not related to learning at the strain or individual level, but predator wariness increased after exposure to chemical defences. Our study provides support for the hypothesis that the evolution of prey defences depends on variation between ecological communities in predator learning behaviour and experience.

Type: Article
Title: Predator learning differences affect the survival of chemically defended prey
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.anbehav.2016.11.029
Publisher version: http://doi.org/10.1016/j.anbehav.2016.11.029
Language: English
Additional information: © 2016 Published by Elsevier Ltd on behalf of The Association for the Study of Animal Behaviour. This manuscript version is made available under a Creative Commons Attribution Non-commercial Non-derivative 4.0 International license (CC BY-NC-ND 4.0). This license allows you to share, copy, distribute and transmit the work for personal and non-commercial use providing author and publisher attribution is clearly stated. Further details about CC BY licenses are available at https://creativecommons.org/licenses/. Access may be initially restricted by the publisher.
Keywords: Aposematism; conspicuousness; dietary wariness; learning; selection
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/1542150
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