101
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Ortiz-Ramírez MF, Andersen MJ, Zaldívar-Riverón A, Ornelas JF, Navarro-Sigüenza AG. Geographic isolation drives divergence of uncorrelated genetic and song variation in the Ruddy-capped Nightingale-Thrush (Catharus frantzii; Aves: Turdidae). Mol Phylogenet Evol 2015; 94:74-86. [PMID: 26302950 DOI: 10.1016/j.ympev.2015.08.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 08/13/2015] [Accepted: 08/17/2015] [Indexed: 01/29/2023]
Abstract
Montane barriers influence the evolutionary history of lineages by promoting isolation of populations. The effects of these historical processes are evident in patterns of differentiation among extant populations, which are often expressed as genetic and behavioral variation between populations. We investigated the effects of geographic barriers on the evolutionary history of a Mesoamerican bird by studying patterns of genetic and vocal variation in the Ruddy-capped Nightingale-Thrush (Turdidae: Catharus frantzii), a non-migratory oscine bird that inhabits montane forests from central Mexico to Panama. We reconstructed the phylogeographic history and estimated divergence times between populations using Bayesian and maximum likelihood methods. We found strong support for the existence of four mitochondrial lineages of C. frantzii corresponding to isolated mountain ranges: Sierra Madre Oriental; Sierra Madre del Sur; the highlands of Chiapas, Guatemala, and El Salvador; and the Talamanca Cordillera. Vocal features in C. frantzii were highly variable among the four observed clades, but vocal variation and genetic variation were uncorrelated. Song variation in C. frantzii suggests that sexual selection and cultural drift could be important factors driving song differentiation in C. frantzii.
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Affiliation(s)
- Marco F Ortiz-Ramírez
- Museo de Zoología, Facultad de Ciencias, UNAM, Apartado Postal 70-399, México, D. F. 04510, Mexico; Posgrado en Ciencias Biológicas, UNAM, Mexico.
| | - Michael J Andersen
- Department of Ecology and Evolutionary Biology and Biodiversity Institute, University of Kansas, Lawrence, KS 66045, USA; Department of Ornithology, American Museum of Natural History, New York, NY 10024, USA
| | - Alejandro Zaldívar-Riverón
- Colección Nacional de Insectos, Instituto de Biología, UNAM, Apartado Postal 70-233, México, D. F. 04510, Mexico
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102
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Ranjard L, Withers SJ, Brunton DH, Ross HA, Parsons S. Integration over song classification replicates: song variant analysis in the hihi. THE JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 2015; 137:2542-2551. [PMID: 25994687 DOI: 10.1121/1.4919329] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Human expert analyses are commonly used in bioacoustic studies and can potentially limit the reproducibility of these results. In this paper, a machine learning method is presented to statistically classify avian vocalizations. Automated approaches were applied to isolate bird songs from long field recordings, assess song similarities, and classify songs into distinct variants. Because no positive controls were available to assess the true classification of variants, multiple replicates of automatic classification of song variants were analyzed to investigate clustering uncertainty. The automatic classifications were more similar to the expert classifications than expected by chance. Application of these methods demonstrated the presence of discrete song variants in an island population of the New Zealand hihi (Notiomystis cincta). The geographic patterns of song variation were then revealed by integrating over classification replicates. Because this automated approach considers variation in song variant classification, it reduces potential human bias and facilitates the reproducibility of the results.
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Affiliation(s)
- Louis Ranjard
- Bioinformatics Institute, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand
| | - Sarah J Withers
- School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand
| | - Dianne H Brunton
- The Institute of Natural and Mathematical Sciences, Massey University, Albany Campus, Private Bag 102 904, North Shore Mail Centre, Auckland 0745, New Zealand
| | - Howard A Ross
- School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand
| | - Stuart Parsons
- School of Biological Sciences, The University of Auckland, Private Bag 92019, Auckland Mail Centre, Auckland 1142, New Zealand
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103
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Riebel K, Lachlan RF, Slater PJ. Learning and Cultural Transmission in Chaffinch Song. ADVANCES IN THE STUDY OF BEHAVIOR 2015. [DOI: 10.1016/bs.asb.2015.01.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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104
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Burbidge T, Parson T, Caycedo-Rosales P, Cadena C, Slabbekoorn H. Playbacks revisited: asymmetry in behavioural response across an acoustic boundary between two parapatric bird species. BEHAVIOUR 2015. [DOI: 10.1163/1568539x-00003309] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Behavioural barriers to gene flow can play a key role in speciation and hybridisation. Birdsong is well-known for its potential contribution to such behavioural barriers as it may affect gene flow through an effect on territorial and mating success across population boundaries. Conspecific recognition and heterospecific discrimination of acoustic variation can prevent or limit hybridization in areas where closely related species meet. Here we tested the impact of song differences on territorial response levels between two adjacent Henicorhina wood-wren species along an elevational gradient in Colombia. In an earlier study, playback results had revealed an asymmetric response pattern, with low-elevation H. leucophrys bangsi responding strongly to any conspecific or heterospecific song variant, whereas high-elevation H. anachoreta birds discriminated, responding more strongly to their own songs than to those of bangsi. However, in that study we could not exclude a role for relative familiarity to the song stimuli. In the current study we confirm the asymmetric response pattern with song stimuli recorded close to and on both sides of the distinct acoustic boundary. Furthermore, we also show a previously unnoticed divergence in singing style between these two wood-wren species, which may contribute to an acoustically guided barrier to hybridization in this secondary contact zone.
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Affiliation(s)
- Tamsin Burbidge
- Behavioural Biology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
| | - Thari Parson
- Behavioural Biology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
| | | | - Carlos Daniel Cadena
- Laboratorio de Biología Evolutiva de Vertebrados, Departamento de Ciencias Biológicas, Universidad de Los Andes, Apartado 4976, Bogotá, Colombia
| | - Hans Slabbekoorn
- Behavioural Biology, Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE Leiden, The Netherlands
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105
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Puniamoorthy N. Behavioural barriers to reproduction may evolve faster than sexual morphology among populations of a dung fly (Sepsidae). Anim Behav 2014. [DOI: 10.1016/j.anbehav.2014.10.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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106
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The evolution of vocal learning. Curr Opin Neurobiol 2014; 28:48-53. [DOI: 10.1016/j.conb.2014.06.007] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 06/14/2014] [Accepted: 06/20/2014] [Indexed: 11/17/2022]
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107
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González C, Ornelas JF. Acoustic divergence with gene flow in a lekking hummingbird with complex songs. PLoS One 2014; 9:e109241. [PMID: 25271429 PMCID: PMC4182805 DOI: 10.1371/journal.pone.0109241] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Accepted: 09/04/2014] [Indexed: 02/05/2023] Open
Abstract
Hummingbirds have developed a remarkable diversity of learned vocalizations, from single-note songs to phonologically and syntactically complex songs. In this study we evaluated if geographic song variation of wedge-tailed sabrewings (Campylopterus curvipennis) is correlated with genetic divergence, and examined processes that explain best the origin of intraspecific song variation. We contrasted estimates of genetic differentiation, genetic structure, and gene flow across leks from microsatellite loci of wedge-tailed sabrewings with measures for acoustic signals involved in mating derived from recordings of males singing at leks throughout eastern Mexico. We found a strong acoustic structure across leks and geography, where lek members had an exclusive assemblage of syllable types, differed in spectral and temporal measurements of song, and song sharing decreased with geographic distance. However, neutral genetic and song divergence were not correlated, and measures of genetic differentiation and migration estimates indicated gene flow across leks. The persistence of acoustic structuring in wedge-tailed sabrewings may thus best be explained by stochastic processes across leks, in which intraspecific vocal variation is maintained in the absence of genetic differentiation by postdispersal learning and social conditions, and by geographical isolation due to the accumulation of small differences, producing most dramatic changes between populations further apart.
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Affiliation(s)
- Clementina González
- Departamento de Biología Evolutiva, Instituto de Ecología AC, Xalapa, Veracruz, México
| | - Juan Francisco Ornelas
- Departamento de Biología Evolutiva, Instituto de Ecología AC, Xalapa, Veracruz, México
- * E-mail:
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108
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Lin A, Jiang T, Kanwal JS, Lu G, Luo J, Wei X, Luo B, Feng J. Geographical variation in echolocation vocalizations of the Himalayan leaf-nosed bat: contribution of morphological variation and cultural drift. OIKOS 2014. [DOI: 10.1111/oik.01604] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aiqing Lin
- Jilin Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal Univ.; 2555 Jingyue Street Changchun 130117 China
- Key Laboratory of Vegetation Ecology of Education Ministry, Inst. of Grassland Science, Northeast Normal Univ.; 5268 Renmin Street Changchun 130024 China
| | - Tinglei Jiang
- Jilin Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal Univ.; 2555 Jingyue Street Changchun 130117 China
- Key Laboratory of Vegetation Ecology of Education Ministry, Inst. of Grassland Science, Northeast Normal Univ.; 5268 Renmin Street Changchun 130024 China
| | - Jagmeet S. Kanwal
- Dept of Neurology; Georgetown Univ. Medical Center; Washington DC USA
| | - Guanjun Lu
- Jilin Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal Univ.; 2555 Jingyue Street Changchun 130117 China
- Key Laboratory of Vegetation Ecology of Education Ministry, Inst. of Grassland Science, Northeast Normal Univ.; 5268 Renmin Street Changchun 130024 China
| | - Jinhong Luo
- Jilin Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal Univ.; 2555 Jingyue Street Changchun 130117 China
- Key Laboratory of Vegetation Ecology of Education Ministry, Inst. of Grassland Science, Northeast Normal Univ.; 5268 Renmin Street Changchun 130024 China
| | - Xuewen Wei
- Jilin Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal Univ.; 2555 Jingyue Street Changchun 130117 China
- Key Laboratory of Vegetation Ecology of Education Ministry, Inst. of Grassland Science, Northeast Normal Univ.; 5268 Renmin Street Changchun 130024 China
| | - Bo Luo
- Jilin Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal Univ.; 2555 Jingyue Street Changchun 130117 China
- Key Laboratory of Vegetation Ecology of Education Ministry, Inst. of Grassland Science, Northeast Normal Univ.; 5268 Renmin Street Changchun 130024 China
| | - Jiang Feng
- Jilin Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal Univ.; 2555 Jingyue Street Changchun 130117 China
- Key Laboratory of Vegetation Ecology of Education Ministry, Inst. of Grassland Science, Northeast Normal Univ.; 5268 Renmin Street Changchun 130024 China
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109
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The structure of an avian syllable syntax network. Behav Processes 2014; 106:53-9. [PMID: 24792818 DOI: 10.1016/j.beproc.2014.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Revised: 03/20/2014] [Accepted: 04/22/2014] [Indexed: 11/22/2022]
Abstract
A common result in recent linguistic studies on word association networks is that their topology can often be described by Zipf's law, in which most words have few associations, whereas a few words are highly connected. However, little is known about syntactic networks in more rudimentary communication systems, which could represent a window into the early stages of language evolution. In this study, we investigate the syntactic network formed by syllable associations in the song of the oscine bird Troglodytes musculus. We use methods recently developed in the context of the study of complex networks to assess topological characteristics in the syntactic networks of T. musculus. We found statistically significant evidence for nestedness in the syllable association network of T. musculus, indicating network organization around a core of commonly used notes, small-world features, and a non-random degree distribution. Our analyses suggest the possibility of a balance between the maintenance of core notes and the acquisition/loss of rare notes through both cultural drift and improvisation. These results underscore the usefulness of investigating communication networks of other animal species in uncovering the initial steps in the evolution of complex syntax networks.
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110
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Kagawa H, Suzuki K, Takahasi M, Okanoya K. Domestication changes innate constraints for birdsong learning. Behav Processes 2014; 106:91-7. [PMID: 24793499 DOI: 10.1016/j.beproc.2014.04.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Revised: 04/18/2014] [Accepted: 04/21/2014] [Indexed: 02/05/2023]
Abstract
Birdsongs are acquired by imitating the sounds produced by conspecifics. Within a species, songs diverge by cultural transmission, but the range of species-specific features is restricted by innate constraints. Bengalese finches (Lonchura striata var. domestica) are a domesticated strain of the wild White-rumped munia (Lonchura striata). The songs of the domesticated strain have more tonal sounds and more variable sequences than those of the wild strain. We compared the features of songs that were produced by normal birds, isolation-reared birds, and cross-fostered birds in both White-rumped munias and Bengalese finches to identify differences in the genetic and environmental factors of their songs. Factor analyses were conducted based on 17 song measurements. We found that isolated songs differed from normal and cross-fostered songs, especially in unstable prosodic features. In addition, there were significant differences in sound property of mean frequency between the two strains regardless of the rearing conditions. Thus, innate constraints that partially determine birdsong phenotypes may be altered through domestication.
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Affiliation(s)
- Hiroko Kagawa
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan; Japan Society for the Promotion of Science, Tokyo, Japan; RIKEN BSI, Saitama, Japan.
| | - Kenta Suzuki
- Okanoya Emotional Information Project, ERATO, Japan Science and Technology Agency, Saitama, Japan; RIKEN BSI, Saitama, Japan.
| | - Miki Takahasi
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan; Japan Society for the Promotion of Science, Tokyo, Japan; RIKEN BSI, Saitama, Japan.
| | - Kazuo Okanoya
- Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan; Okanoya Emotional Information Project, ERATO, Japan Science and Technology Agency, Saitama, Japan; RIKEN BSI, Saitama, Japan.
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111
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Fayet AL, Tobias JA, Hintzen RE, Seddon N. Immigration and dispersal are key determinants of cultural diversity in a songbird population. Behav Ecol 2014. [DOI: 10.1093/beheco/aru047] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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112
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Jung WJ, Lee JW, Yoo JC. "Cu-coo": can you recognize my stepparents?--A study of host-specific male call divergence in the common Cuckoo. PLoS One 2014; 9:e90468. [PMID: 24603770 PMCID: PMC3946207 DOI: 10.1371/journal.pone.0090468] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Accepted: 02/04/2014] [Indexed: 11/19/2022] Open
Abstract
The presence of multiple host-specific races in the common cuckoo Cuculus canorus has long been recognized as an evolutionary enigma but how this genetic divergence could be maintained is still equivocal. Some recent studies supported biparental genetic contribution in maintaining the host-races, implying the necessity that they should recognize and mate assortatively with those who belong to the same host-race. One potential mechanism to accomplish this is that males may produce distinctive calls according to host-specific lineages. In order to test this hypothesis, we carried out a comparative study for male cuckoo calls recorded from three distant populations, where two populations share a same host species while the other parasitizes a different host species. Populations with similar habitat structures, maintaining comparable distance interval (ca. 150 km) between neighboring ones, were selected so as to minimize any other causes of vocal differentiation except the pattern of host use. By comparing the vocal characteristics of male cuckoos at the level of individual as well as population, we found that individual males indeed produced different calls in terms of spectral and temporal features. However, these differences disappeared when we compared the calls at the population level according to host species and geographic location. In conclusion, it seems unlikely for the cuckoos to identify the stepparent of male cuckoos based solely on the vocal characteristics, although they may be able to use this cue for individual recognition. Future studies including detailed morphological and genetic comparisons will be worthwhile to further elucidate this issue.
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Affiliation(s)
- Won-Ju Jung
- Korea Institute of Ornithology & Department of Biology, Kyung Hee University, Seoul, Republic of Korea
| | - Jin-Won Lee
- Korea Institute of Ornithology & Department of Biology, Kyung Hee University, Seoul, Republic of Korea
- * E-mail:
| | - Jeong-Chil Yoo
- Korea Institute of Ornithology & Department of Biology, Kyung Hee University, Seoul, Republic of Korea
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113
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Unbehend M, Hänniger S, Vásquez GM, Juárez ML, Reisig D, McNeil JN, Meagher RL, Jenkins DA, Heckel DG, Groot AT. Geographic variation in sexual attraction of Spodoptera frugiperda corn- and rice-strain males to pheromone lures. PLoS One 2014; 9:e89255. [PMID: 24586634 PMCID: PMC3929749 DOI: 10.1371/journal.pone.0089255] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 01/17/2014] [Indexed: 11/19/2022] Open
Abstract
The corn- and rice-strains of Spodoptera frugiperda exhibit several genetic and behavioral differences and appear to be undergoing ecological speciation in sympatry. Previous studies reported conflicting results when investigating male attraction to pheromone lures in different regions, but this could have been due to inter-strain and/or geographic differences. Therefore, we investigated whether corn- and rice-strain males differed in their response to different synthetic pheromone blends in different regions in North America, the Caribbean and South America. All trapped males were strain-typed by two strain-specific mitochondrial DNA markers. In the first experiment, we found a nearly similar response of corn- and rice-strain males to two different 4-component blends, resembling the corn- and rice-strain female blend we previously described from females in Florida. This response showed some geographic variation in fields in Canada, North Carolina, Florida, Puerto Rico, and South America (Peru, Argentina). In dose-response experiments with the critical secondary sex pheromone component (Z)-7-dodecenyl acetate (Z7-12:OAc), we found some strain-specific differences in male attraction. While the response to Z7-12:OAc varied geographically in the corn-strain, rice-strain males showed almost no variation. We also found that the minor compound (Z)-11-hexadecenyl acetate (Z11-16:OAc) did not increase attraction of both strains in Florida and of corn-strain males in Peru. In a fourth experiment, where we added the stereo-isomer of the critical sex pheromone component, (E)-7-dodecenyl acetate, to the major pheromone component (Z)-9-tetradecenyl acetate (Z9-14:OAc), we found that this compound was attractive to males in North Carolina, but not to males in Peru. Overall, our results suggest that both strains show rather geographic than strain-specific differences in their response to pheromone lures, and that regional sexual communication differences might cause geographic differentiation between populations.
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Affiliation(s)
- Melanie Unbehend
- Department of Entomology, Max Planck Institute for Chemical Ecology (MPICE), Jena, Germany
- * E-mail:
| | - Sabine Hänniger
- Department of Entomology, Max Planck Institute for Chemical Ecology (MPICE), Jena, Germany
| | - Gissella M. Vásquez
- Department of Entomology, North Carolina State University, Raleigh, North Carolina, United States of America
| | - María Laura Juárez
- Sección Zoología Agrícola, Estación Experimental Agroindustrial Obispo Colombres, Las Talitas, Tucumán, Argentina
| | - Dominic Reisig
- Department of Entomology, North Carolina State University, Plymouth, North Carolina, United States of America
| | - Jeremy N. McNeil
- Department of Biology, University of Western Ontario, London, Ontario, Canada
| | - Robert L. Meagher
- Insect Behavior and Biocontrol Research Unit, United States Department of Agriculture, Gainesville, Florida, United States of America
| | - David A. Jenkins
- Tropical Crops and Germplasm Research, United States Department of Agriculture, Mayaguez, Puerto Rico
| | - David G. Heckel
- Department of Entomology, Max Planck Institute for Chemical Ecology (MPICE), Jena, Germany
| | - Astrid T. Groot
- Department of Entomology, Max Planck Institute for Chemical Ecology (MPICE), Jena, Germany
- Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, the Netherlands
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114
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Brown R. Rethinking Behavioral Evolution. HISTORY, PHILOSOPHY AND THEORY OF THE LIFE SCIENCES 2014. [DOI: 10.1007/978-94-007-7067-6_12] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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115
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Searcy WA, Akçay C, Nowicki S, Beecher MD. Aggressive Signaling in Song Sparrows and Other Songbirds. ADVANCES IN THE STUDY OF BEHAVIOR 2014. [DOI: 10.1016/b978-0-12-800286-5.00003-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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116
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Valderrama SV, Molles LE, Waas JR, Slabbekoorn H. Conservation implications of song divergence between source and translocated populations of the North Island Kōkako. J Appl Ecol 2013. [DOI: 10.1111/1365-2664.12094] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sandra V. Valderrama
- Department of Biological Sciences; The University of Waikato; Private Bag 3105; Hamilton; 3240; New Zealand
| | - Laura E. Molles
- Department of Ecology, Lincoln University; Burns Building Rm 520; Lincoln 7647; Christchurch; New Zealand
| | - Joseph R. Waas
- Department of Biological Sciences; The University of Waikato; Private Bag 3105; Hamilton; 3240; New Zealand
| | - Hans Slabbekoorn
- Institute of Biology Leiden; Leiden University; Sylviusweg 72 2333BE; PO Box 9505, 2300RA; Leiden; The Netherlands
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117
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Xing XY, Alström P, Yang XJ, Lei FM. Recent northward range expansion promotes song evolution in a passerine bird, the Light-vented Bulbul. J Evol Biol 2013; 26:867-77. [DOI: 10.1111/jeb.12101] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2012] [Revised: 11/30/2012] [Accepted: 12/07/2012] [Indexed: 11/26/2022]
Affiliation(s)
- X. Y. Xing
- Key Laboratory of Zoological Systematics and Evolution; Institute of Zoology; Chinese Academy of Sciences; Beijing China
- University of Chinese Academy of Sciences; Beijing China
| | - P. Alström
- Key Laboratory of Zoological Systematics and Evolution; Institute of Zoology; Chinese Academy of Sciences; Beijing China
- Swedish Species Information Centre; Swedish University of Agricultural Sciences; Uppsala Sweden
| | - X. J. Yang
- School of Environmental Studies; China University of Geosciences; Wuhan China
| | - F. M. Lei
- Key Laboratory of Zoological Systematics and Evolution; Institute of Zoology; Chinese Academy of Sciences; Beijing China
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118
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On the maintenance of bird song dialects. J Math Biol 2013; 68:505-31. [DOI: 10.1007/s00285-012-0632-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 11/20/2012] [Indexed: 10/27/2022]
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119
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Wilkins MR, Seddon N, Safran RJ. Evolutionary divergence in acoustic signals: causes and consequences. Trends Ecol Evol 2012; 28:156-66. [PMID: 23141110 DOI: 10.1016/j.tree.2012.10.002] [Citation(s) in RCA: 261] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 09/19/2012] [Accepted: 10/04/2012] [Indexed: 12/24/2022]
Abstract
Acoustic signals mediate mate choice, resource defense, and species recognition in a broad range of taxa. It has been proposed, therefore, that divergence in acoustic signals plays a key role in speciation. Nonetheless, the processes driving divergence of acoustic traits and their consequences in terms of speciation are poorly understood. A review of empirical and comparative studies reveals strong support for a role of sexual selection in acoustic divergence, but the possible concomitant influences of ecological context are rarely examined. We summarize a conceptual framework for testing the relative significance of both adaptive and neutral mechanisms leading to acoustic divergence, predictions for cases where these processes lead to speciation, and how their relative importance plays out over evolutionary time.
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Affiliation(s)
- Matthew R Wilkins
- Department of Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309-0334, USA.
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120
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Salinas-Melgoza A, Wright TF. Evidence for vocal learning and limited dispersal as dual mechanisms for dialect maintenance in a parrot. PLoS One 2012; 7:e48667. [PMID: 23139809 PMCID: PMC3490863 DOI: 10.1371/journal.pone.0048667] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 09/28/2012] [Indexed: 11/19/2022] Open
Abstract
Studies of avian vocal dialects commonly find evidence of geographic and acoustic stability in the face of substantial gene flow between dialects. The vocal imitation and reduced dispersal hypotheses are alternatives to explain this mismatch between vocal and genetic variation. We experimentally simulated dispersal in the yellow-naped amazon (Amazona auropalliata) by moving individuals within and across dialect boundaries in Costa Rica. One juvenile translocated across dialect boundaries altered its contact call to imitate the acoustic form of the local call six weeks post-release. In contrast, four adults translocated across dialect boundaries returned to their original capture site within 120 days, while five cross-dialect translocated adults who remained at the release site did not alter their contact calls. Translocated individuals were observed to show some segregation from resident flocks. The observation of vocal imitation by the juvenile bird supports the vocal imitation, whereas the behavior of adults is more consistent with the reduced dispersal hypotheses. Taken together, our results suggest that both post-dispersal learning by juveniles and high philopatry in adults could explain the stability of vocal dialects in the face of immigration and gene flow.
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121
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Roach SP, Johnson L, Phillmore LS. Repertoire composition and singing behaviour in two eastern populations of the Hermit Thrush (Catharus guttatus). BIOACOUSTICS 2012. [DOI: 10.1080/09524622.2012.699254] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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122
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Ríos-Chelén AA, Salaberria C, Barbosa I, Macías Garcia C, Gil D. The learning advantage: bird species that learn their song show a tighter adjustment of song to noisy environments than those that do not learn. J Evol Biol 2012; 25:2171-80. [DOI: 10.1111/j.1420-9101.2012.02597.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 07/10/2012] [Accepted: 07/10/2012] [Indexed: 12/01/2022]
Affiliation(s)
- A. A. Ríos-Chelén
- Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México; México DF; México
| | - C. Salaberria
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales (CSIC); Madrid; Spain
| | - I. Barbosa
- Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México; México DF; México
| | - C. Macías Garcia
- Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México; México DF; México
| | - D. Gil
- Departamento de Ecología Evolutiva; Museo Nacional de Ciencias Naturales (CSIC); Madrid; Spain
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123
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Benedict L, Bowie RCK. Rattling cisticola song features and variability across sub‐
S
aharan
A
frica. J Zool (1987) 2012. [DOI: 10.1111/j.1469-7998.2011.00890.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- L. Benedict
- School of Biological Sciences University of Northern Colorado Greeley CO USA
| | - R. C. K. Bowie
- Museum of Vertebrate Zoology and Department of Integrative Biology University of California Berkeley CA USA
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124
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Greig EI, Taft BN, Pruett-Jones S. Sons learn songs from their social fathers in a cooperatively breeding bird. Proc Biol Sci 2012; 279:3154-60. [PMID: 22593105 DOI: 10.1098/rspb.2011.2582] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Song learning is hypothesized to allow social adaptation to a local song neighbourhood. Maintaining social associations is particularly important in cooperative breeders, yet vocal learning in such species has only been assessed in systems where social association was correlated with relatedness. Thus, benefits of vocal learning as a means of maintaining social associations could not be disentangled from benefits of kin recognition. We assessed genetic and cultural contributions to song in a species where social association was not strongly correlated with kinship: the cooperatively breeding, reproductively promiscuous splendid fairy-wren (Malurus splendens). We found that song characters of socially associated father-son pairs were more strongly correlated (and thus songs were more similar) than songs of father-son pairs with a genetic, but no social, association (i.e. cuckolding fathers). Song transmission was, therefore, vertical and cultural, with minimal signatures of kinship. Additionally, song characters were not correlated with several phenotypic indicators of male quality, supporting the idea that there may be a tradeoff between accurate copying of tutors and quality signalling via maximizing song performance, particularly when social and genetic relationships are decoupled. Our results lend support to the hypothesis that song learning facilitates the maintenance of social associations by permitting unrelated individuals to acquire similar signal phenotypes.
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Affiliation(s)
- Emma I Greig
- Cornell Laboratory of Ornithology, and Department of Neurobiology and Behavior, Cornell University, Ithaca, NY 14850, USA.
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125
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Wich SA, Krützen M, Lameira AR, Nater A, Arora N, Bastian ML, Meulman E, Morrogh-Bernard HC, Atmoko SSU, Pamungkas J, Perwitasari-Farajallah D, Hardus ME, van Noordwijk M, van Schaik CP. Call cultures in orang-utans? PLoS One 2012; 7:e36180. [PMID: 22586464 PMCID: PMC3346723 DOI: 10.1371/journal.pone.0036180] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 03/28/2012] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Several studies suggested great ape cultures, arguing that human cumulative culture presumably evolved from such a foundation. These focused on conspicuous behaviours, and showed rich geographic variation, which could not be attributed to known ecological or genetic differences. Although geographic variation within call types (accents) has previously been reported for orang-utans and other primate species, we examine geographic variation in the presence/absence of discrete call types (dialects). Because orang-utans have been shown to have geographic variation that is not completely explicable by genetic or ecological factors we hypothesized that this will be similar in the call domain and predict that discrete call type variation between populations will be found. METHODOLOGY/PRINCIPAL FINDINGS We examined long-term behavioural data from five orang-utan populations and collected fecal samples for genetic analyses. We show that there is geographic variation in the presence of discrete types of calls. In exactly the same behavioural context (nest building and infant retrieval), individuals in different wild populations customarily emit either qualitatively different calls or calls in some but not in others. By comparing patterns in call-type and genetic similarity, we suggest that the observed variation is not likely to be explained by genetic or ecological differences. CONCLUSION/SIGNIFICANCE These results are consistent with the potential presence of 'call cultures' and suggest that wild orang-utans possess the ability to invent arbitrary calls, which spread through social learning. These findings differ substantially from those that have been reported for primates before. First, the results reported here are on dialect and not on accent. Second, this study presents cases of production learning whereas most primate studies on vocal learning were cases of contextual learning. We conclude with speculating on how these findings might assist in bridging the gap between vocal communication in non-human primates and human speech.
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Affiliation(s)
- Serge A Wich
- Anthropological Institute and Museum, University of Zurich, Zurich, Switzerland.
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126
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O’Loghlen AL, Rothstein SI. Delayed vocal ontogeny in songbirds: a laboratory study validates a model for delayed development derived from field studies. J ETHOL 2012. [DOI: 10.1007/s10164-012-0334-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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127
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Rowell JT, Servedio MR. Vocal communications and the maintenance of population specific songs in a contact zone. PLoS One 2012; 7:e35257. [PMID: 22574116 PMCID: PMC3344826 DOI: 10.1371/journal.pone.0035257] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2011] [Accepted: 03/14/2012] [Indexed: 11/27/2022] Open
Abstract
Bird song has been hypothesized to play a role in several important aspects of the biology of songbirds, including the generation of taxonomic diversity by speciation; however, the role that song plays in speciation within this group may be dependent upon the ability of populations to maintain population specific songs or calls in the face of gene flow and external cultural influences. Here, in an exploratory study, we construct a spatially explicit model of population movement to examine the consequences of secondary contact of populations singing distinct songs. We concentrate on two broad questions: 1) will population specific songs be maintained in a contact zone or will they be replaced by shared song, and 2) what spatial patterns in the distribution of songs may result from contact? We examine the effects of multiple factors including song-based mating preferences and movement probabilities, oblique versus paternal learning of song, and both cultural and genetic mutations. We find a variety of conditions under which population specific songs can be maintained, particularly when females have preferences for their population specific songs, and we document many distinct patterns of song distribution within the contact zone, including clines, banding, and mosaics.
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Affiliation(s)
- Jonathan T Rowell
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America.
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128
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Tibbetts EA, Skaldina O, Zhao V, Toth AL, Skaldin M, Beani L, Dale J. Geographic variation in the status signals of Polistes dominulus paper wasps. PLoS One 2011; 6:e28173. [PMID: 22174776 PMCID: PMC3235107 DOI: 10.1371/journal.pone.0028173] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Accepted: 11/02/2011] [Indexed: 11/29/2022] Open
Abstract
Understanding intraspecific geographic variation in animal signals poses a challenging evolutionary problem. Studies addressing geographic variation typically focus on signals used in mate-choice, however, geographic variation in intrasexual signals involved in competition is also known to occur. In Polistes dominulus paper wasps, females have black facial spots that signal dominance: individuals wasps with more complex ‘broken’ facial patterns are better fighters and are avoided by rivals. Recent work suggests there is dramatic geographic variation in these visual signals of quality, though this variation has not been explicitly described or quantified. Here, we analyze variation in P. dominulus signals across six populations and explore how environmental conditions may account for this variation. Overall, we found substantial variation in facial pattern brokenness across populations and castes. Workers have less broken facial patterns than gynes and queens, which have similar facial patterns. Strepsipteran parasitism, body size and temperature are all correlated with the facial pattern variation, suggesting that developmental plasticity likely plays a key role in this variation. First, the extent of parasitism varies across populations and parasitized individuals have lower facial pattern brokenness than unparasitized individuals. Second, there is substantial variation in body size across populations and a weak but significant relationship between facial pattern brokenness and body size. Wasps from populations with smaller body size (e.g. Italy) tend to have less broken facial patterns than wasps from populations with larger body size (e.g. New York, USA). Third, there is an apparent association between facial patterns and climate, with wasp from cooler locations tending to have higher facial pattern brokenness than wasps from warmer locations. Additional experimental work testing the causes and consequences of facial pattern variation will be important, as geographic variation in signals has important consequences for the evolution of communication systems and social behavior.
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Affiliation(s)
- Elizabeth A. Tibbetts
- Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, Michigan, United States of America
- * E-mail:
| | - Oksana Skaldina
- Department of Nature Protection Nikitsky Botanical Garden, National Scientific Center Nikita, Yalta, Crimea, Ukraine
| | - Vera Zhao
- Department of Ecology, Evolution, and Organismal Biology and Department of Entomology, Iowa State University, Ames, Iowa, United States of America
| | - Amy L. Toth
- Department of Ecology, Evolution, and Organismal Biology and Department of Entomology, Iowa State University, Ames, Iowa, United States of America
| | - Maksim Skaldin
- Joint Biotechnology Laboratory, Department of Chemistry, Mathematics and Natural Sciences Faculty, University of Turku, BioCity 6A, Turku, Finland
| | - Laura Beani
- Department of Evolutionary Biology “Leo Pardi”, University of Florence, Firenze, Italia
| | - James Dale
- Institute of Natural Sciences, Albany Campus, Massey University, Auckland, New Zealand
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129
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130
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Rzeszutek T, Savage PE, Brown S. The structure of cross-cultural musical diversity. Proc Biol Sci 2011; 279:1606-12. [PMID: 22072606 DOI: 10.1098/rspb.2011.1750] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Human cultural traits, such as languages, musics, rituals and material objects, vary widely across cultures. However, the majority of comparative analyses of human cultural diversity focus on between-culture variation without consideration for within-culture variation. In contrast, biological approaches to genetic diversity, such as the analysis of molecular variance (AMOVA) framework, partition genetic diversity into both within- and between-population components. We attempt here for the first time to quantify both components of cultural diversity by applying the AMOVA model to music. By employing this approach with 421 traditional songs from 16 Austronesian-speaking populations, we show that the vast majority of musical variability is due to differences within populations rather than differences between. This demonstrates a striking parallel to the structure of genetic diversity in humans. A neighbour-net analysis of pairwise population musical divergence shows a large amount of reticulation, indicating the pervasive occurrence of borrowing and/or convergent evolution of musical features across populations.
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Affiliation(s)
- Tom Rzeszutek
- Department of Psychology, Neuroscience & Behaviour, McMaster University, Hamilton, Ontario, Canada.
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131
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Pitocchelli J. Macrogeographic variation in the song of the Mourning Warbler (Oporornis philadelphia). CAN J ZOOL 2011. [DOI: 10.1139/z11-077] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Studies of macrogeographic variation in birdsong involve populations incapable of interbreeding because of physical barriers or separation by large distances. Different patterns have emerged from these studies such as (i) little or no variation exists among individuals or populations from the breeding range, (ii) individual variation is greater than among population variation resulting in no geographic structure, (iii) clinal variation, and (iv) macrogeographic variation where all individuals from several populations on the breeding range share a common song type forming a regional dialect or regiolect. I studied macrogeographic variation in song of the Mourning Warbler ( Oporornis philadelphia (A. Wilson, 1810)). The observed pattern was similar to the fourth category of geographic variation with regiolects. A Western regiolect extended from northern Alberta to western Ontario. An Eastern regiolect stretched eastward from western Ontario and Wisconsin to the Gaspé Peninsula and New England, then southward through the Appalachians to West Virginia. Nova Scotia and Newfoundland each had unique regiolects. Finally, I compared these results to other species with regiolects and assessed the ability of some deterministic hypotheses to explain song divergence (e.g., role of morphology, physical barriers, island isolation).
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Affiliation(s)
- J. Pitocchelli
- Department of Biology, Saint Anselm College, Manchester, NH 03102, USA
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132
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Osiejuk TS, Bielecka A, Skierczyński M. What exactly is ‘local song’ in a population of ortolan buntings with a common dialect? J ETHOL 2011. [DOI: 10.1007/s10164-011-0306-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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133
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Laiolo P, Obeso JR, Roggia Y. Mimicry as a novel pathway linking biodiversity functions and individual behavioural performances. Proc Biol Sci 2011; 278:1072-81. [PMID: 20861043 PMCID: PMC3049029 DOI: 10.1098/rspb.2010.1653] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Accepted: 09/02/2010] [Indexed: 11/12/2022] Open
Abstract
The feedback of biodiversity on individual trait variation is a poorly explored mechanistic pathway in ecological research. We analysed the relationship between biodiversity and individual performance by focusing on vocal mimicry, a widespread interaction that may serve in intra- and interspecific communication. We studied the songs of two lark species (genus Galerida) that increase the complexity of their song displays by mimicking other birds, and analysed the influence of bird species richness on individual song performance. The diversity of mimicked species and the prevalence of mimicry increased in areas characterized by great α and γ diversity (i.e. where larks experience more diverse encounters with community members, many of them being highly vocal owing to breeding). Conversely, the variability in species-specific song components peaked where larks were abundant, probably matching the complexity of conspecific social milieu. Some trade-offs existed between homo- and heterospecific complexity, suggesting that larks could change from population- to community-driven song variation by tracking the composition of the auditory environment. Mimicry, which serves communication with conspecifics or predators, may mediate interactions, ultimately cascading to aspects of ecological diversity other than those promoting its complexity.
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Affiliation(s)
- Paola Laiolo
- ICAB, CSIC and Oviedo University, 33071 Oviedo, Spain.
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134
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Dingle C, Poelstra JW, Halfwerk W, Brinkhuizen DM, Slabbekoorn H. Asymmetric response patterns to subspecies-specific song differences in allopatry and parapatry in the gray-breasted wood-wren. Evolution 2011; 64:3537-48. [PMID: 20666843 DOI: 10.1111/j.1558-5646.2010.01089.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Song divergence between closely related taxa may play a critical role in the evolutionary processes of speciation and hybridization. We explored song variation between two Ecuadorian subspecies of the gray-breasted wood-wren (Henicorhina leucophrys) and tested the impact of song divergence on response behaviors. Songs were significantly different between the two subspecies, even between two parapatric populations 10 km apart. Playback experiments revealed an asymmetric response pattern to these divergent subspecies specific songs; one subspecies responded more to songs of its own subspecies than to the other subspecies' songs, whereas the second responded equally strongly to songs of both subspecies. While song parameters revealed a mixed pattern of divergence between allopatric and parapatric populations, the majority of spectral characteristics showed increased divergence in parapatry, suggestive of character displacement. This increased song divergence in parapatry appeared to affect behavioral responses to playback as discriminating responses were most prominent in parapatry and against parapatric songs. The clear behavioral impact of subspecies-specific song differences supports a potential role for song as an acoustic barrier to gene flow. The asymmetric nature of the responses suggests that song divergence could affect the direction of gene flow and the position of the subspecies-specific transition.
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Affiliation(s)
- Caroline Dingle
- Behavioural Ecology Group, Zoology Department, Cambridge University, Downing Street, Cambridge, CB2 3EJ, United Kingdom.
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135
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Vocal dialect and genetic subdivisions along a geographic gradient in the orange-tufted sunbird. Behav Ecol Sociobiol 2011. [DOI: 10.1007/s00265-011-1149-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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136
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Lameira AR, Delgado RA, Wich SA. Review of geographic variation in terrestrial mammalian acoustic signals: Human speech variation in a comparative perspective. ACTA ACUST UNITED AC 2010. [DOI: 10.1556/jep.8.2010.4.2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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137
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Rowell JT. Tactical population movements and distributions for ideally motivated competitors. Am Nat 2010; 176:638-50. [PMID: 20887191 DOI: 10.1086/656494] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The spatial distributions of populations are a reflection of underlying rules for movement behavior in the context of the environment encountered by individuals. Here I study how ideal directed movement--in which individuals travel in the direction offering the most immediate perceived improvement to their personal fitness--dictates the spatial position of two populations occupying the same relative niche and engaged in competition via interference to an individual's ability to gather resources. Drawing on the analytic derivation of equilibria, numerical simulations, and graphical assessments, I provide conditions under which sympatry, parapatry, or regional exclusion is expected during different phases of the community's development. I also demonstrate that specific competitive asymmetries produce distinguishable distributions and invasion patterns and identify which populations are found centrally or peripherally. Dynamic and dispersal equilibria were examined for differences in the sensitivity to spatial variations in fitness, per capita mortality, metabolic efficiency, the strength of interspecific interference, resource collection speed, and the optimal location of each population along an environmental cline. These asymmetries were studied both in isolation and pairwise in fitness trade-off scenarios.
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Affiliation(s)
- Jonathan T Rowell
- Department of Ecology and Evolutionary Biology, University of Tennessee, Knoxville, TN 37996, USA.
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138
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Colbeck GJ, Sillett TS, Webster MS. Asymmetric discrimination of geographical variation in song in a migratory passerine. Anim Behav 2010. [DOI: 10.1016/j.anbehav.2010.05.013] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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139
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140
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Brumm H, Farrington H, Petren K, Fessl B. Evolutionary dead end in the Galápagos: divergence of sexual signals in the rarest of Darwin's finches. PLoS One 2010; 5:e11191. [PMID: 20585648 PMCID: PMC2890412 DOI: 10.1371/journal.pone.0011191] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 05/20/2010] [Indexed: 11/18/2022] Open
Abstract
Understanding the mechanisms underlying speciation remains a challenge in evolutionary biology. The adaptive radiation of Darwin's finches is a prime example of species formation, and their study has revealed many important insights into evolutionary processes. Here, we report striking differences in mating signals (songs), morphology and genetics between the two remnant populations of Darwin's mangrove finch Camarhynchus heliobates, one of the rarest species in the world. We also show that territorial males exhibited strong discrimination of sexual signals by locality: in response to foreign songs, males responded weaker than to songs from their own population. Female responses were infrequent and weak but gave approximately similar results. Our findings not only suggest speciation in the mangrove finch, thereby providing strong support for the central role of sexual signals during speciation, but they have also implications for the conservation of this iconic bird. If speciation is complete, the eastern species will face imminent extinction, because it has a population size of only 5-10 individuals.
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Affiliation(s)
- Henrik Brumm
- Communication and Social Behaviour Group, Max Planck Institute for Ornithology, Seewiesen, Germany.
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141
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Kiefer S, Sommer C, Scharff C, Kipper S. Singing the Popular Songs? Nightingales Share More Song Types with Their Breeding Population in Their Second Season than in Their First. Ethology 2010. [DOI: 10.1111/j.1439-0310.2010.01774.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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142
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Abstract
In urban environments, anthropogenic noise can interfere with animal communication. Here we study the influence of urban noise on the cultural evolution of bird songs. We studied three adjacent dialects of white-crowned sparrow songs over a 30-year time span. Urban noise, which is louder at low frequencies, increased during our study period and therefore should have created a selection pressure for songs with higher frequencies. We found that the minimum frequency of songs increased both within and between dialects during the 30-year time span. For example, the dialect with the highest minimum frequency is in the process of replacing another dialect that has lower frequency songs. Songs with the highest minimum frequency were favoured in this environment and should have the most effective transmission properties. We suggest that one mechanism that influences how dialects, and cultural traits in general, are selected and transmitted from one generation to the next is the dialect's ability to be effectively communicated in the local environment.
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Affiliation(s)
- David Luther
- Department of Plant Science and Landscape Architecture, University of Maryland, , 2116 Plant Sciences Building, College Park, MD 20742-4452, USA.
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143
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144
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Anderson RC. Operant conditioning and copulation solicitation display assays reveal a stable preference for local song by female swamp sparrows Melospiza georgiana. Behav Ecol Sociobiol 2009. [DOI: 10.1007/s00265-009-0838-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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145
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Nelson DA, Poesel A. Does learning produce song conformity or novelty in white-crowned sparrows, Zonotrichia leucophrys? Anim Behav 2009. [DOI: 10.1016/j.anbehav.2009.04.028] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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146
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Benedict L, Bowie RCK. Macrogeographical variation in the song of a widely distributed African warbler. Biol Lett 2009; 5:484-7. [PMID: 19443510 DOI: 10.1098/rsbl.2009.0244] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The songs of oscine passerine birds vary on many spatial scales, reflecting the actions of diverse evolutionary pressures. Here we examine the songs of Cisticola erythrops, which effectively signal species identity across a geographical area spanning 6500 km in sub-Saharan Africa. Selection for species identification should promote stability in song traits, while sexual selection and geographical segregation should promote diversity. Cisticola erythrops share syllable types across the entire range of species and structure songs similarly, but individuals sing highly variable songs through improvisational recombination of syllables. Patterns of syllable use change gradually across the range of the species and do not show distinct breaks at subspecies boundaries. The acoustic properties of the most common syllable type also change gradually with distance. The results illustrate how songs can be simultaneously species-specific and highly variable at an individual level. At a larger level, patterns of variation indicate that cultural drift has generated song diversity through an isolation by distance mechanism.
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Affiliation(s)
- Lauryn Benedict
- Museum of Vertebrate Zoology, Department of Integrative Biology, University of California, Berkeley, CA 94708, USA.
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147
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Cockburn A, Dalziell AH, Blackmore CJ, Double MC, Kokko H, Osmond HL, Beck NR, Head ML, Wells K. Superb fairy-wren males aggregate into hidden leks to solicit extragroup fertilizations before dawn. Behav Ecol 2009. [DOI: 10.1093/beheco/arp024] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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148
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Chapter 5 Vocal Performance and Sensorimotor Learning in Songbirds. ADVANCES IN THE STUDY OF BEHAVIOR 2009. [DOI: 10.1016/s0065-3454(09)40005-6] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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149
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Laiolo P. Characterizing the spatial structure of songbird cultures. ECOLOGICAL APPLICATIONS : A PUBLICATION OF THE ECOLOGICAL SOCIETY OF AMERICA 2008; 18:1774-1780. [PMID: 18839771 DOI: 10.1890/07-1433.1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Recent advances have shown that human-driven habitat transformations can affect the cultural attributes of animal populations in addition to their genetic integrity and dynamics. Here I propose using the song of oscine birds for identifying the cultural spatial structure of bird populations and highlighting critical thresholds associated with habitat fragmentation. I studied song variation over a wide geographical scale in a small and endangered passerine, the Dupont's Lark Chersophilus duponti, focusing on (1) cultural population structure, to determine a statistical representation of spatial variation in song and identify cultural units, and (2) the minimum patch size needed for an individual to develop a stable repertoire. I found that overall song diversity depends on variation among populations (beta-cultural diversity). Abrupt thresholds occurred in the relationships between individual song dissimilarity and geographic distance, and between individual song diversity and patch area. Spatial autocorrelation analysis showed that populations located as little as 5 km apart may have independently evolved their song traditions. Song diversity stabilized in patches as small as 100 ha supporting as few as 8-20 males. Song repertoires of smaller patches were significantly poorer. Almost one-quarter of the study populations inhabited patches <100 ha, and their cultural traditions appear to have eroded. The analysis of spatial patterns in birdsong may be a useful tool for detecting subpopulations prone to extinction.
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Affiliation(s)
- Paola Laiolo
- Estacidn Biológica de Doñana (CSIC), Avenida M. Luisa s/n, 41013 Sevilla and Instituto Cantdbrico de Biodiversidad (CSIC-UO-PA), Universidad de Oviedo, 33006 Oviedo, Spain.
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