1
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Madabhushi AJ, Wewhare N, Binwal P, Agarwal V, Krishnan A. Higher-order dialectic variation and syntactic convergence in the complex warble song of budgerigars. J Exp Biol 2023; 226:jeb245678. [PMID: 37732394 DOI: 10.1242/jeb.245678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 09/11/2023] [Indexed: 09/22/2023]
Abstract
Dialectic signatures in animal acoustic signals are key in the identification of and association with group members. Complex vocal sequences may also convey information about behavioral state, and may thus vary according to social environment. Some bird species, such as psittaciforms, learn and modify their complex acoustic signals throughout their lives. However, the structure and function of vocal sequences in open-ended vocal learners remains understudied. Here, we examined vocal sequence variation in the warble song of budgerigars, and how these change upon contact between social groups. Budgerigars are open-ended vocal learners which exhibit fission-fusion flock dynamics in the wild. We found that two captive colonies of budgerigars exhibited colony-specific differences in the syntactic structure of their vocal sequences. Individuals from the two colonies differed in the propensity to repeat certain note types, forming repetitive motifs which served as higher-order signatures of colony identity. When the two groups were brought into contact, their vocal sequences converged, and these colony-specific repetitive patterns disappeared, with males from both erstwhile colonies now producing similar sequences with similar syntactic structure. We present data suggesting that the higher-order temporal arrangement of notes/vocal units is modified throughout life by social learning as groups of birds continually associate and dissociate. Our study sheds light on the importance of examining signal structure at multiple levels of organization, and the potential for psittaciform birds as model systems to examine the influence of learning and social environment on acoustic signals.
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Affiliation(s)
- Abhinava Jagan Madabhushi
- Department of Biology, Indian Institute of Science Education and Research (IISER) Pune, Pashan Road, Pune 411008, Maharashtra, India
| | - Nakul Wewhare
- Department of Biology, Indian Institute of Science Education and Research (IISER) Pune, Pashan Road, Pune 411008, Maharashtra, India
| | - Priya Binwal
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Kolkata, Mohanpur 741246, West Bengal, India
| | - Vaishnavi Agarwal
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhauri 462066, Madhya Pradesh, India
| | - Anand Krishnan
- Department of Biological Sciences, Indian Institute of Science Education and Research (IISER) Bhopal, Bhauri 462066, Madhya Pradesh, India
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2
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Sibly RM, Curnow RN. Sexual imprinting leads to speciation in locally adapted populations. Ecol Evol 2022; 12:e9479. [PMID: 36381395 PMCID: PMC9643133 DOI: 10.1002/ece3.9479] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/19/2022] [Accepted: 10/19/2022] [Indexed: 11/10/2022] Open
Abstract
Sexual imprinting is widespread in birds and other species but its existence requires explanation. Our results suggest that sexual imprinting leads to speciation in locally-adapted populations if a neutral mating cue-e.g., novel plumage coloration-arises through mutation. Importantly, the mating cue locus is not linked to adaptation loci. Local adaptation is a necessary precursor to speciation and occurs when evolution results in stable genetic polymorphisms with one allele predominating in some areas while others predominate elsewhere. Here we use a deterministic two-niche population genetic model to map the set of migration and selection rates for which polymorphic evolutionary outcomes, i.e., local adaptations, can occur. Approximate equations for the boundaries of the set of polymorphic evolutionary outcomes were derived by Bulmer (American Naturalist, 106, 254, 1972), but our results, obtained by deterministic simulation of the evolutionary process, show that one of Bulmer's equations is inaccurate except when the level of dominance is 0.5, and fails if one of the alleles is dominant. Having an accurate map of the set of migration and selection rates for which polymorphic evolutionary outcomes can occur, we then show using the model of Sibly et al. (Ecology and Evolution, 9, 13506, 2019) that local adaptation in all analyzed cases leads to speciation if a new neutral mating cue arises by mutation. We finish by considering how genome sequencing makes possible testing our model and its predictions.
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Affiliation(s)
| | - Robert N. Curnow
- Department of Mathematics and StatisticsUniversity of ReadingReadingUK
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3
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Hudson EJ, Creanza N. Modeling how population size drives the evolution of birdsong, a functional cultural trait. Evolution 2022; 76:1139-1152. [PMID: 35403212 PMCID: PMC9324838 DOI: 10.1111/evo.14489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 03/09/2022] [Indexed: 01/21/2023]
Abstract
Oscine songbirds have been an important study system for social learning, particularly because their learned songs provide an analog for human languages and music. Here, we propose a different analogy: from an evolutionary perspective, could birds' songs change over time more like arrowheads than arias? Small improvements to a bird's song can lead to large fitness differences for its singer, which could make songs more analogous to human tools than languages. We modify a model of human tool evolution to accommodate cultural evolution of birdsong: each song learner chooses the most skilled available tutor to emulate, and each is more likely to produce an inferior copy than a superior one. Similar to human tool evolution, our model suggests that larger populations of birds could foster improvements in song over time, even when learners restrict their pool of tutors to a subset of individuals in their social network. We also demonstrate that song elements could be simplified instead of lost after population bottlenecks if lower quality traits are easier to imitate than higher quality ones. We show that these processes could plausibly generate empirically observed patterns of song evolution for some song traits, and we make predictions about the types of song elements most likely to be lost when populations shrink. More broadly, we aim to connect the modeling approaches used in human and nonhuman systems, moving toward a cohesive theoretical framework that accounts for both cognitive and demographic processes.
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Affiliation(s)
- Emily J. Hudson
- Department of Biological SciencesVanderbilt UniversityNashvilleTennessee37240
- Evolutionary Studies InitiativeVanderbilt UniversityNashvilleTennessee37240
| | - Nicole Creanza
- Department of Biological SciencesVanderbilt UniversityNashvilleTennessee37240
- Evolutionary Studies InitiativeVanderbilt UniversityNashvilleTennessee37240
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4
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Rosenthal GG, Ryan MJ. Sexual selection and the ascent of women: Mate choice research since Darwin. Science 2022; 375:eabi6308. [PMID: 35050648 DOI: 10.1126/science.abi6308] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Darwin's theory of sexual selection fundamentally changed how we think about sex and evolution. The struggle over mating and fertilization is a powerful driver of diversification within and among species. Contemporaries dismissed Darwin's conjecture of a "taste for the beautiful" as favoring particular mates over others, but there is now overwhelming evidence for a primary role of both male and female mate choice in sexual selection. Darwin's misogyny precluded much analysis of the "taste"; an increasing focus on mate choice mechanisms before, during, and after mating reveals that these often evolve in response to selection pressures that have little to do with sexual selection on chosen traits. Where traits and preferences do coevolve, they can do so whether fitness effects on choosers are positive, neutral, or negative. The spectrum of selection on traits and preferences, and how traits and preferences respond to social effects, determine how sexual selection and mate choice influence broader-scale processes like reproductive isolation and population responses to environmental change.
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Affiliation(s)
- Gil G Rosenthal
- Department of Biology, University of Padova, Padova, Italy.,Centro de Investigaciones Científicas de las Huastecas "Aguazarca," Calnali, Hidalgo, Mexico
| | - Michael J Ryan
- Department of Integrative Biology, University of Texas, Austin, TX, USA.,Smithsonian Tropical Research Institute, Balboa, Republic of Panama
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5
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Rather PA, Herzog AE, Ernst DA, Westerman EL. Effect of experience on mating behaviour in male Heliconius melpomene butterflies. Anim Behav 2022. [DOI: 10.1016/j.anbehav.2021.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Metzler D, Knief U, Peñalba JV, Wolf JBW. Assortative mating and epistatic mating-trait architecture induce complex movement of the crow hybrid zone. Evolution 2021; 75:3154-3174. [PMID: 34694633 DOI: 10.1111/evo.14386] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 10/06/2021] [Indexed: 12/20/2022]
Abstract
Hybrid zones provide a window into the evolutionary processes governing species divergence. Yet, the contribution of mate choice to the temporal and spatial stability of hybrid zones remains poorly explored. Here, we investigate the effects of assortative mating on hybrid-zone dynamics by means of a mathematical model parameterized with phenotype and genotype data from the hybrid zone between all-black carrion and gray-coated hooded crows. In the best-fit model, narrow clines of the two mating-trait loci were maintained by a moderate degree of assortative mating inducing pre- and postzygotic isolation via positive frequency-dependent selection. Epistasis between the two loci induced hybrid-zone movement in favor of alleles conveying dark plumage followed by a shift in the opposite direction favoring gray-coated phenotypes ∼ 1 200 generations after secondary contact. Unlinked neutral loci diffused near-unimpeded across the zone. These results were generally robust to the choice of matching rule (self-referencing or parental imprinting) and effects of genetic drift. Overall, this study illustrates under which conditions assortative mating can maintain steep clines in mating-trait loci without generalizing to genome-wide reproductive isolation. It further emphasizes the importance of the genetic mating-trait architecture for spatio-temporal hybrid-zone dynamics.
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Affiliation(s)
- Dirk Metzler
- Faculty of Biology, Division of Evolutionary Biology, LMU Munich, Munich, 80539, Germany
| | - Ulrich Knief
- Faculty of Biology, Division of Evolutionary Biology, LMU Munich, Munich, 80539, Germany
| | - Joshua V Peñalba
- Faculty of Biology, Division of Evolutionary Biology, LMU Munich, Munich, 80539, Germany
| | - Jochen B W Wolf
- Faculty of Biology, Division of Evolutionary Biology, LMU Munich, Munich, 80539, Germany
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7
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Tibbetts EA, Snell-Rood EC. Reciprocal plasticity and the diversification of communication systems. Anim Behav 2021. [DOI: 10.1016/j.anbehav.2021.07.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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8
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Marie-Orleach L, Sanz AM, Bailey NW, Ritchie MG. Does the response of D. melanogaster males to intrasexual competitors influence sexual isolation? Behav Ecol 2020. [DOI: 10.1093/beheco/arz209] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
AbstractThe evolutionary consequences of phenotypic plasticity are debated. For example, reproductive barriers between incipient species can depend on the social environment, but most evidence for this comes from studies focusing on the effects of experiencing heterospecific individuals of the opposite sex. In Drosophila melanogaster, males are well known to invest strategically in ejaculate components and show different courtship behavior when reared in the presence of male competitors. It is unknown whether such plasticity in response to same-sex social experience influences sexual isolation, so we tested this using African and cosmopolitan lines, which show partial sexual isolation. Males were housed in social isolation, with homopopulation, or with heteropopulation male partners. We then measured their mating success, latency, and duration, their paternity share, and female remating success. Isolated males copulated for a shorter duration than males housed with any male partners. However, we found no difference in any measure between homopopulation or heteropopulation treatments. Our findings suggest that the male intrasexual competitive social environment does not strongly influence sexual isolation in D. melanogaster, and that plastic effects on reproductive isolation may be influenced more strongly by the experience of social isolation than by the composition of individuals within different social environments.
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Affiliation(s)
- Lucas Marie-Orleach
- Centre for Biological Diversity, School of Biology, University of St Andrews, St Andrews, United Kingdom
- Natural History Museum, University of Oslo, Oslo, Norway
- CNRS, Université de Rennes 1, ECOBIO (Écosystèmes, Biodiversité, Évolution)—UMR 6553, Rennes, France
| | - Annui M Sanz
- Centre for Biological Diversity, School of Biology, University of St Andrews, St Andrews, United Kingdom
| | - Nathan W Bailey
- Centre for Biological Diversity, School of Biology, University of St Andrews, St Andrews, United Kingdom
| | - Michael G Ritchie
- Centre for Biological Diversity, School of Biology, University of St Andrews, St Andrews, United Kingdom
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9
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Sibly RM, Pagel M, Curnow RN, Edwards J. How phenotypic matching based on neutral mating cues enables speciation in locally adapted populations. Ecol Evol 2019; 9:13506-13514. [PMID: 31871661 PMCID: PMC6912886 DOI: 10.1002/ece3.5806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/04/2019] [Accepted: 10/10/2019] [Indexed: 11/07/2022] Open
Abstract
Maynard Smith's (American Naturalist, 1966, 100, 637) suggestion that in some cases a prerequisite for speciation is the existence of local ecological adaptations has not received much attention to date. Here, we test the hypothesis using a model like that of Maynard Smith but differing in the way animals disperse between niches. In previous studies, males disperse randomly between niches but females stay put in their natal niche. As a first step toward generalizing the model, we here analyze the case that equal proportions of the two sexes disperse between niches before breeding. Supporting Maynard Smith's (1966) hypothesis, we find that once local adaptations are established, a neutral mating cue at an independent locus can rapidly enable speciation in populations with a suitable mechanism for phenotype matching. We find that stable ecological polymorphisms are relatively insensitive to the strength of selection, but depend crucially on the extent of dispersal between niches, with a threshold of ~5% if population sizes in two niches are equal. At higher levels of dispersal, ecological differentiation is lost. These results contrast with those of earlier studies and shed light on why parapatric speciation is limited by the extent of gene flow. Our testable model provides a candidate explanation for the rapid speciation rates, diversity of appearance and occurrence of "species flocks" observed among some African cichlids and neotropical birds and may also have implications for the occurrence of punctuational change on phylogenies.
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Affiliation(s)
| | - Mark Pagel
- School of Biological SciencesUniversity of ReadingReadingUK
| | - Robert N. Curnow
- Department of Mathematics and StatisticsUniversity of ReadingReadingUK
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10
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Servedio MR, Hermisson J. The evolution of partial reproductive isolation as an adaptive optimum. Evolution 2019; 74:4-14. [DOI: 10.1111/evo.13880] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 11/07/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Maria R. Servedio
- Department of Biology University of North Carolina Chapel Hill North Carolina 27599
| | - Joachim Hermisson
- Mathematics and BioSciences Group, Faculty of Mathematics and Max F. Perutz Laboratories University of Vienna Vienna Austria
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11
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Whitehead H, Laland KN, Rendell L, Thorogood R, Whiten A. The reach of gene-culture coevolution in animals. Nat Commun 2019; 10:2405. [PMID: 31160560 PMCID: PMC6546714 DOI: 10.1038/s41467-019-10293-y] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Accepted: 05/02/2019] [Indexed: 12/26/2022] Open
Abstract
Culture (behaviour based on socially transmitted information) is present in diverse animal species, yet how it interacts with genetic evolution remains largely unexplored. Here, we review the evidence for gene-culture coevolution in animals, especially birds, cetaceans and primates. We describe how culture can relax or intensify selection under different circumstances, create new selection pressures by changing ecology or behaviour, and favour adaptations, including in other species. Finally, we illustrate how, through culturally mediated migration and assortative mating, culture can shape population genetic structure and diversity. This evidence suggests strongly that animal culture plays an important evolutionary role, and we encourage explicit analyses of gene-culture coevolution in nature.
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Affiliation(s)
- Hal Whitehead
- Department of Biology, Dalhousie University, Halifax, B3H 4R2, Canada.
| | - Kevin N Laland
- Centre for Social Learning and Cognitive Evolution, School of Biology, University of St Andrews, St Andrews, KY16 9TF, United Kingdom
| | - Luke Rendell
- Centre for Social Learning and Cognitive Evolution, School of Biology, University of St Andrews, St Andrews, KY16 9TF, United Kingdom
| | - Rose Thorogood
- Department of Zoology, University of Cambridge, Cambridge, CB2 3EJ, United Kingdom
- Helsinki Institute of Life Science, University of Helsinki, Helsinki, 00014, Finland
- Faculty of Biological and Environmental Sciences (Research Program in Organismal & Evolutionary Biology), University of Helsinki, Helsinki, 00014, Finland
| | - Andrew Whiten
- Centre for Social Learning and Cognitive Evolution, School of Psychology and Neuroscience, University of St Andrews, St Andrews, KY16 9JP, United Kingdom
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12
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Dion E, Monteiro A, Nieberding CM. The Role of Learning on Insect and Spider Sexual Behaviors, Sexual Trait Evolution, and Speciation. Front Ecol Evol 2019. [DOI: 10.3389/fevo.2018.00225] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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13
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Yeh DJ. Assortative Mating by an Obliquely Transmitted Local Cultural Trait Promotes Genetic Divergence: A Model. Am Nat 2018; 193:81-92. [PMID: 30624103 DOI: 10.1086/700958] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The effect of learned culture (e.g., birdsong dialects and human languages) on genetic divergence is unclear. Previous theoretical research suggests that because oblique learning allows phenotype transmission from individuals with no offspring to an unrelated individual in the next generation, the effect of sexual selection on the learned trait is masked. However, I propose that migration and spatially constrained learning can form statistical associations between cultural and genetic traits, which may allow selection on the cultural traits to indirectly affect the genetic traits. Here, I build a population genetic model that allows such statistical associations to form and find that sexual selection and divergent selection on the cultural trait can indeed help maintain genetic divergence through such statistical associations, while selection against genetic hybrids does not affect cultural trait divergence. Furthermore, I find that even when the cultural trait changes over time due to drift and mutation, it can still help maintain genetic divergence. These results suggest the role of obliquely transmitted traits in evolution may be underrated, and the lack of one-to-one associations between cultural and genetic traits may not be sufficient to disprove the role of culture in genetic divergence.
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14
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Kopp M, Servedio MR, Mendelson TC, Safran RJ, Rodríguez RL, Hauber ME, Scordato EC, Symes LB, Balakrishnan CN, Zonana DM, van Doorn GS. Mechanisms of Assortative Mating in Speciation with Gene Flow: Connecting Theory and Empirical Research. Am Nat 2018; 191:1-20. [DOI: 10.1086/694889] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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15
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Servedio MR, Boughman JW. The Role of Sexual Selection in Local Adaptation and Speciation. ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS 2017. [DOI: 10.1146/annurev-ecolsys-110316-022905] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Sexual selection plays several intricate and complex roles in the related processes of local adaptation and speciation. In some cases sexual selection can promote these processes, but in others it can be inhibitory. We present theoretical and empirical evidence supporting these dual effects of sexual selection during local adaptation, allopatric speciation, and speciation with gene flow. Much of the empirical evidence for sexual selection promoting speciation is suggestive rather than conclusive; we present what would constitute strong evidence for sexual selection driving speciation. We conclude that although there is ample evidence that sexual selection contributes to the speciation process, it is very likely to do so only in concert with natural selection.
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Affiliation(s)
- Maria R. Servedio
- Department of Biology, University of North Carolina, Chapel Hill, North Carolina 27516
| | - Janette W. Boughman
- Department of Integrative Biology, Michigan State University, East Lansing, Michigan 48824
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16
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Cotto O, Servedio MR. The Roles of Sexual and Viability Selection in the Evolution of Incomplete Reproductive Isolation: From Allopatry to Sympatry. Am Nat 2017; 190:680-693. [DOI: 10.1086/693855] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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17
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Freeman BG, Montgomery GA, Schluter D. Evolution and plasticity: Divergence of song discrimination is faster in birds with innate song than in song learners in Neotropical passerine birds. Evolution 2017; 71:2230-2242. [PMID: 28722748 DOI: 10.1111/evo.13311] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 05/15/2017] [Accepted: 06/29/2017] [Indexed: 02/06/2023]
Abstract
Plasticity is often thought to accelerate trait evolution and speciation. For example, plasticity in birdsong may partially explain why clades of song learners are more diverse than related clades with innate song. This "song learning" hypothesis predicts that (1) differences in song traits evolve faster in song learners, and (2) behavioral discrimination against allopatric song (a proxy for premating reproductive isolation) evolves faster in song learners. We tested these predictions by analyzing acoustic traits and conducting playback experiments in allopatric Central American sister pairs of song learning oscines (N = 42) and nonlearning suboscines (N = 27). We found that nonlearners evolved mean acoustic differences slightly faster than did leaners, and that the mean evolutionary rate of song discrimination was 4.3 times faster in nonlearners than in learners. These unexpected results may be a consequence of significantly greater variability in song traits in song learners (by 54-79%) that requires song-learning oscines to evolve greater absolute differences in song before achieving the same level of behavioral song discrimination as nonlearning suboscines. This points to "a downside of learning" for the evolution of species discrimination, and represents an important example of plasticity reducing the rate of evolution and diversification by increasing variability.
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Affiliation(s)
- Benjamin G Freeman
- Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.,Department of Zoology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
| | | | - Dolph Schluter
- Biodiversity Research Centre, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada.,Department of Zoology, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
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18
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Trajković J, Miličić D, Savić T, Pavković-Lučić S. Sexual selection, sexual isolation and pheromones in Drosophila melanogaster strains after long-term maintaining on different diets. Behav Processes 2017; 140:81-86. [PMID: 28419833 DOI: 10.1016/j.beproc.2017.04.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 02/28/2017] [Accepted: 04/13/2017] [Indexed: 11/27/2022]
Abstract
Evolution of reproductive isolation may be a consequence of a variety of signals used in courtship and mate preferences. Pheromones play an important role in both sexual selection and sexual isolation. The abundance of pheromones in Drosophila melanogaster may depend on different environmental factors, including diet. The aim of this study was to ascertain to which degree principal pheromones affect sexual selection in D. melanogaster. We used D. melanogaster strains reared for 14 years on four substrates: standard cornmeal substrate and those containing tomato, banana and carrot. We have previously determined that long-term maintaining of these dietary strains resulted in differences in their cuticular hydrocarbons profile (CHs). In this work, we have tested the level of sexual selection and sexual isolation between aforementioned strains. We found that the high levels of cis-vaccenyl acetate, 7-pentacosene and 7,11-nonacosadiene in the strain reared on a substrate containing carrot affected the individual attractiveness and influenced sexual isolation between flies of this strain and flies reared on a substrate containing banana. Based on these results, long-term different diets, may contribute, to sexual behaviour of D. melanogaster via the effects of principal pheromones.
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Affiliation(s)
- Jelena Trajković
- University of Belgrade, Faculty of Biology, Studentski trg 16, 11000 Belgrade, Serbia.
| | - Dragana Miličić
- University of Belgrade, Faculty of Biology, Studentski trg 16, 11000 Belgrade, Serbia
| | - Tatjana Savić
- University of Belgrade, Institute for Biological Research "Siniša Stanković", 142 Despot Stefan Blvd, 11000 Belgrade, Serbia
| | - Sofija Pavković-Lučić
- University of Belgrade, Faculty of Biology, Studentski trg 16, 11000 Belgrade, Serbia
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19
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Head ML, Jennions MD, Zajitschek SRK. Sexual selection: incorporating non-genetic inheritance. Curr Opin Behav Sci 2016. [DOI: 10.1016/j.cobeha.2016.10.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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20
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Yang Y, Richards-Zawacki CL, Devar A, Dugas MB. Poison frog color morphs express assortative mate preferences in allopatry but not sympatry. Evolution 2016; 70:2778-2788. [PMID: 27704539 DOI: 10.1111/evo.13079] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 09/12/2016] [Accepted: 09/20/2016] [Indexed: 11/29/2022]
Abstract
The concurrent divergence of mating traits and preferences is necessary for the evolution of reproductive isolation via sexual selection, and such coevolution has been demonstrated in diverse lineages. However, the extent to which assortative mate preferences are sufficient to drive reproductive isolation in nature is less clear. Natural contact zones between lineages divergent in traits and preferences provide exceptional opportunities for testing the predicted evolutionary consequences of such divergence. The strawberry poison frog (Oophaga pumilio) displays extreme color polymorphism in and around the young Bocas del Toro archipelago. In a transition zone between red and blue allopatric lineages, we asked whether female preferences diverged along with coloration, and whether any divergent preferences persist in a zone of sympatry. When choosing among red, blue and phenotypically intermediate males, females from monomorphic red and monomorphic blue populations both expressed assortative preferences. However, red, blue, and intermediate females from the contact zone all preferred red males, suggesting that divergent preferences may be insufficient to effect behavioral isolation. Our results highlight the complexity of behavioral isolation, and the need for studies that can reveal the circumstances under which divergent preferences do and do not contribute to speciation.
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Affiliation(s)
- Yusan Yang
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, 70118.,Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260.,Current Address: Department of Biological Sciences, University of Pittsburgh, 2429 Fifth Ave, Pittsburgh, Pennsylvania, 15260
| | - Corinne L Richards-Zawacki
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, 70118.,Department of Biological Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, 15260.,Smithsonian Tropical Research Institute, Balboa, Ancon, Republica de Panama
| | - Anisha Devar
- Department of Ecology and Evolutionary Biology, Tulane University, New Orleans, 70118
| | - Matthew B Dugas
- Department of Biology, Case Western Reserve University, Cleveland, Ohio, 44106
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Halfwerk W, Dingle C, Brinkhuizen DM, Poelstra JW, Komdeur J, Slabbekoorn H. Sharp acoustic boundaries across an altitudinal avian hybrid zone despite asymmetric introgression. J Evol Biol 2016; 29:1356-67. [PMID: 27037611 DOI: 10.1111/jeb.12876] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 03/29/2016] [Accepted: 03/30/2016] [Indexed: 11/30/2022]
Abstract
Birdsong is a sexually selected trait that could play an important evolutionary role when related taxa come into secondary contact. Many songbird species, however, learn their songs through copying one or more tutors, which complicates the evolutionary outcome of such contact. Two subspecies of a presumed vocal learner, the grey-breasted wood-wren (Henicorhina leucophrys), replace each other altitudinally across the western slope of the Ecuadorian Andes. These subspecies are morphologically very similar, but show striking differences in their song. We examined variation in acoustic traits and genetic composition across the altitudinal range covered by both subspecies and between two allopatric populations. The acoustic boundary between the subspecies was found to be highly abrupt across a narrow elevational range with virtually no evidence of song convergence. Mixed singing and use of hetero-subspecific song occurred in the contact zone and was biased towards the use of leucophrys song types. Hetero-subspecific song copying by hilaris and not by leucophrys reflected a previously found asymmetric pattern of response to song playback. Using amplified fragment length polymorphisms (AFLP) markers, we detected hybridization in the contact zone and asymmetric introgression in parapatric populations, with more leucophrys alleles present in hilaris populations than vice versa. This pattern may be a trail of introgression due to upslope displacement of leucophrys by hilaris. Our data suggest that song learning may impact speciation and hybridization in contrasting ways at different spatial scales: although learning may speed up population divergence in songs, thereby enhancing assortative mating and reducing gene flow, it may at a local level also lead to the copying of heterospecific songs, therefore allowing some level of hybridization and introgression.
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Affiliation(s)
- W Halfwerk
- Behavioural Biology, Institute of Biology (IBL), Leiden University, Leiden, the Netherlands.,Animal Ecology, Department of Ecological Science, VU University Amsterdam, Amsterdam, the Netherlands
| | - C Dingle
- Behavioural Ecology Group, Zoology Department, Cambridge University, Cambridge, UK.,Department of Earth Sciences, The University of Hong Kong, Hong Kong, Hong Kong
| | - D M Brinkhuizen
- Behavioural Biology, Institute of Biology (IBL), Leiden University, Leiden, the Netherlands.,Animal Ecology Group, Centre for Ecological and Evolutionary Studies, Groningen University, Haren, the Netherlands
| | - J W Poelstra
- Behavioural Biology, Institute of Biology (IBL), Leiden University, Leiden, the Netherlands.,Animal Ecology Group, Centre for Ecological and Evolutionary Studies, Groningen University, Haren, the Netherlands
| | - J Komdeur
- Behavioural and Physiological Ecology Group, Groningen Institute for Evolutionary Life Sciences, Groningen University, Groningen, the Netherlands
| | - H Slabbekoorn
- Behavioural Biology, Institute of Biology (IBL), Leiden University, Leiden, the Netherlands
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Gilman RT, Kozak GM. Learning to speciate: The biased learning of mate preferences promotes adaptive radiation. Evolution 2015; 69:3004-12. [PMID: 26459795 PMCID: PMC5057300 DOI: 10.1111/evo.12797] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 09/23/2015] [Accepted: 10/04/2015] [Indexed: 11/29/2022]
Abstract
Bursts of rapid repeated speciation called adaptive radiations have generated much of Earth's biodiversity and fascinated biologists since Darwin, but we still do not know why some lineages radiate and others do not. Understanding what causes assortative mating to evolve rapidly and repeatedly in the same lineage is key to understanding adaptive radiation. Many species that have undergone adaptive radiations exhibit mate preference learning, where individuals acquire mate preferences by observing the phenotypes of other members of their populations. Mate preference learning can be biased if individuals also learn phenotypes to avoid in mates, and shift their preferences away from these avoided phenotypes. We used individual-based computational simulations to study whether biased and unbiased mate preference learning promotes ecological speciation and adaptive radiation. We found that ecological speciation can be rapid and repeated when mate preferences are biased, but is inhibited when mate preferences are learned without bias. Our results suggest that biased mate preference learning may play an important role in generating animal biodiversity through adaptive radiation.
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23
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Servedio MR, Bürger R. The effects of sexual selection on trait divergence in a peripheral population with gene flow. Evolution 2015; 69:2648-61. [DOI: 10.1111/evo.12762] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 07/30/2015] [Accepted: 08/10/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Maria R. Servedio
- Department of Biology; University of North Carolina; Chapel Hill North Carolina 27599
| | - Reinhard Bürger
- Department of Mathematics; University of Vienna; Oskar-Morgenstern-Platz 1 1090 Vienna Austria
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Servedio MR. Geography, assortative mating, and the effects of sexual selection on speciation with gene flow. Evol Appl 2015; 9:91-102. [PMID: 27087841 PMCID: PMC4780376 DOI: 10.1111/eva.12296] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 07/01/2015] [Indexed: 12/27/2022] Open
Abstract
Theoretical and empirical research on the evolution of reproductive isolation have both indicated that the effects of sexual selection on speciation with gene flow are quite complex. As part of this special issue on the contributions of women to basic and applied evolutionary biology, I discuss my work on this question in the context of a broader assessment of the patterns of sexual selection that lead to, versus inhibit, the speciation process, as derived from theoretical research. In particular, I focus on how two factors, the geographic context of speciation and the mechanism leading to assortative mating, interact to alter the effect that sexual selection through mate choice has on speciation. I concentrate on two geographic contexts: sympatry and secondary contact between two geographically separated populations that are exchanging migrants and two mechanisms of assortative mating: phenotype matching and separate preferences and traits. I show that both of these factors must be considered for the effects of sexual selection on speciation to be inferred.
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Affiliation(s)
- Maria R Servedio
- Department of Biology University of North Carolina Chapel Hill NC USA
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