Phenotypic integration and the evolution of signal repertoires: a case study of treefrog acoustic communication

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dc.contributor.authorReichert, Michael S.
dc.contributor.authorHoebel, Gerlinde
dc.contributor.funderChicago Herpetological Society
dc.contributor.funderU.S. Department of Education
dc.contributor.funderAmerican Society of Ichthyologists and Herpetologists
dc.contributor.funderSociety for the Study of Amphibians and Reptiles
dc.contributor.funderNational Science Foundation
dc.date.accessioned2018-07-18T11:56:22Z
dc.date.available2018-07-18T11:56:22Z
dc.date.issued2018
dc.description.abstractAnimal signals are inherently complex phenotypes with many interacting parts combining to elicit responses from receivers. The pattern of interrelationships between signal components reflects the extent to which each component is expressed, and responds to selection, either in concert with or independently of others. Furthermore, many species have complex repertoires consisting of multiple signal types used in different contexts, and common morphological and physiological constraints may result in interrelationships extending across the multiple signals in species' repertoires. The evolutionary significance of interrelationships between signal traits can be explored within the framework of phenotypic integration, which offers a suite of quantitative techniques to characterize complex phenotypes. In particular, these techniques allow for the assessment of modularity and integration, which describe, respectively, the extent to which sets of traits covary either independently or jointly. Although signal and repertoire complexity are thought to be major drivers of diversification and social evolution, few studies have explicitly measured the phenotypic integration of signals to investigate the evolution of diverse communication systems. We applied methods from phenotypic integration studies to quantify integration in the two primary vocalization types (advertisement and aggressive calls) in the treefrogs Hyla versicolor, Hyla cinerea, and Dendropsophus ebraccatus. We recorded male calls and calculated standardized phenotypic variance-covariance (P) matrices for characteristics within and across call types. We found significant integration across call types, but the strength of integration varied by species and corresponded with the acoustic similarity of the call types within each species. H.versicolor had the most modular advertisement and aggressive calls and the least acoustically similar call types. Additionally, P was robust to changing social competition levels in H.versicolor. Our findings suggest new directions in animal communication research in which the complex relationships among the traits of multiple signals are a key consideration for understanding signal evolution.en
dc.description.sponsorshipNational Science Foundation (Division of Integrative Organismal Systems (1010791); U.S. Department of Education (P200A070476)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationReichert, M. S. and Hoebel, G. (2018) 'Phenotypic integration and the evolution of signal repertoires: a case study of treefrog acoustic communication', Ecology and Evolution, 8(6), pp. 3410-3429. doi: 10.1002/ece3.3927en
dc.identifier.doi10.1002/ece3.3927
dc.identifier.endpage3429
dc.identifier.issn2045-7758
dc.identifier.issued6
dc.identifier.journaltitleEcology and Evolutionen
dc.identifier.startpage3410
dc.identifier.urihttps://hdl.handle.net/10468/6480
dc.identifier.volume8
dc.language.isoenen
dc.publisherJohn Wiley & Sons Inc.en
dc.relation.urihttps://onlinelibrary.wiley.com/doi/abs/10.1002/ece3.3927
dc.rights© 2018, the Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.en
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectAnuranen
dc.subjectComplex signalen
dc.subjectModularityen
dc.subjectPhenotypic integrationen
dc.subjectSignal evolutionen
dc.titlePhenotypic integration and the evolution of signal repertoires: a case study of treefrog acoustic communicationen
dc.typeArticle (peer-reviewed)en
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