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When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game
BACKGROUND: The reliability of signals is a key issue in the study of animal communication. Both empirical work and theoretical models show that communication need not be entirely honest, and thus signals can be deceitful. Aggressive communication appears to be a prime candidate for such deceitful c...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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BioMed Central
2017
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5745956/ https://www.ncbi.nlm.nih.gov/pubmed/29281957 http://dx.doi.org/10.1186/s12862-017-1112-y |
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author | Számadó, Szabolcs |
author_facet | Számadó, Szabolcs |
author_sort | Számadó, Szabolcs |
collection | PubMed |
description | BACKGROUND: The reliability of signals is a key issue in the study of animal communication. Both empirical work and theoretical models show that communication need not be entirely honest, and thus signals can be deceitful. Aggressive communication appears to be a prime candidate for such deceitful communication, because bluffing has been described in several species. Bluffing in these situations are supposed to be maintained by frequency dependent selection where the fitness of a given type depends on the frequencies of the other types in the population. Previous efforts to model such a scenario through individual based simulations have yielded conflicting results. Studies have either found a rich set of polymorphic strategies including the traditional cheating scenario or found none. Thus, the modelling assumptions responsible for these diverging conclusions remain unclear. RESULTS: In this study, I investigate the effects of four modelling assumptions: the role of an extended strategy set, the initial population composition (seeding), the differences in pay-offs and finally different parameter spaces. I investigate the effects of these factors on the evolvability of both honest and mixed cheating strategies. I show that both honest and cheating equilibria readily evolve and that the investigated parameter range and the seeding of the starting populations have the greatest influence on the outcome. CONCLUSIONS: Both honest signalling and polymorphic cheating equilibria are more likely to evolve from a narrow strategy set than from a random mixture of strategies. A large potential strategy set is not a setback for the evolution of communication -honest or cheating- as long as the initial population is seeded with only a few strategies. In addition, different sections of the parameter space show consistently different behaviour. Thus, frequency dependent selection has the potential to explain various empirical observations that show consistent differences in aggressive behaviour. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12862-017-1112-y) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-5745956 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-57459562018-01-03 When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game Számadó, Szabolcs BMC Evol Biol Research Article BACKGROUND: The reliability of signals is a key issue in the study of animal communication. Both empirical work and theoretical models show that communication need not be entirely honest, and thus signals can be deceitful. Aggressive communication appears to be a prime candidate for such deceitful communication, because bluffing has been described in several species. Bluffing in these situations are supposed to be maintained by frequency dependent selection where the fitness of a given type depends on the frequencies of the other types in the population. Previous efforts to model such a scenario through individual based simulations have yielded conflicting results. Studies have either found a rich set of polymorphic strategies including the traditional cheating scenario or found none. Thus, the modelling assumptions responsible for these diverging conclusions remain unclear. RESULTS: In this study, I investigate the effects of four modelling assumptions: the role of an extended strategy set, the initial population composition (seeding), the differences in pay-offs and finally different parameter spaces. I investigate the effects of these factors on the evolvability of both honest and mixed cheating strategies. I show that both honest and cheating equilibria readily evolve and that the investigated parameter range and the seeding of the starting populations have the greatest influence on the outcome. CONCLUSIONS: Both honest signalling and polymorphic cheating equilibria are more likely to evolve from a narrow strategy set than from a random mixture of strategies. A large potential strategy set is not a setback for the evolution of communication -honest or cheating- as long as the initial population is seeded with only a few strategies. In addition, different sections of the parameter space show consistently different behaviour. Thus, frequency dependent selection has the potential to explain various empirical observations that show consistent differences in aggressive behaviour. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s12862-017-1112-y) contains supplementary material, which is available to authorized users. BioMed Central 2017-12-28 /pmc/articles/PMC5745956/ /pubmed/29281957 http://dx.doi.org/10.1186/s12862-017-1112-y Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Article Számadó, Szabolcs When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game |
title | When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game |
title_full | When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game |
title_fullStr | When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game |
title_full_unstemmed | When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game |
title_short | When honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game |
title_sort | when honesty and cheating pay off: the evolution of honest and dishonest equilibria in a conventional signalling game |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5745956/ https://www.ncbi.nlm.nih.gov/pubmed/29281957 http://dx.doi.org/10.1186/s12862-017-1112-y |
work_keys_str_mv | AT szamadoszabolcs whenhonestyandcheatingpayofftheevolutionofhonestanddishonestequilibriainaconventionalsignallinggame |