Journal ArticleDOI
Evolutionary divergence in acoustic signals: causes and consequences
TLDR
A conceptual framework for testing the relative significance of both adaptive and neutral mechanisms leading to acoustic divergence is summarized, predictions for cases where these processes lead to speciation are predicted, and how their relative importance plays out over evolutionary time are summarized.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.read more
Citations
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Journal ArticleDOI
Languages in Drier Climates Use Fewer Vowels.
TL;DR: Evidence is presented for a positive association between the typical ambient humidity of a language's native locale and that language’s degree of reliance on vowels and the data presented here suggest that languages may evolve, like the communication systems of other species, in ways that are influenced subtly by ecological factors.
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Investigating Individual Vocal Signatures and Small-Scale Patterns of Geographic Variation in Female Bornean Gibbon (Hylobates muelleri) Great Calls
TL;DR: In this paper, the authors used linear discriminant function analysis to identify females based on their calls with 95.7% accuracy using leave-one-out cross-validation.
Journal ArticleDOI
Multiple sexual signals: calls over colors for mate attraction in an aposematic, color-diverse poison frog
Corinna E. Dreher,Heike Pröhl +1 more
TL;DR: The hypothesize that both advertisement calls and coloration affects female mate selection in O.pumilio, and the data highlights the importance to consider an array of signal modalities in multiple wild populations in studies of behavioral isolation.
Journal ArticleDOI
Listening carefully: increased perceptual acuity for species discrimination in multispecies signalling assemblages
Anna Bastian,David S. Jacobs +1 more
TL;DR: It is proposed that a hierarchy of discrimination ability has evolved within the same species in more complex acoustic assemblages to circumvent misidentifications as a result of the use of overlapping signals.
Journal ArticleDOI
Geographic isolation drives divergence of uncorrelated genetic and song variation in the Ruddy-capped Nightingale-Thrush (Catharus frantzii; Aves: Turdidae)
Marco F. Ortiz-Ramírez,Michael J. Andersen,Alejandro Zaldívar-Riverón,Juan Francisco Ornelas,Adolfo G. Navarro-Sigüenza +4 more
TL;DR: Song variation in C. frantzii suggests that sexual selection and cultural drift could be important factors driving song differentiation in the Ruddy-capped Nightingale-Thrush, a non-migratory oscine bird that inhabits montane forests from central Mexico to Panama.
References
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Journal ArticleDOI
Signals, signal conditions, and the direction of evolution
TL;DR: Sensory systems, signals, signaling behavior, and habitat choice are evolutionarily coupled and should coevolve in predictable directions, determined by environmental biophysics, neurobiology, and the genetics of the suites of traits.
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Sexual selection, social competition, and speciation
TL;DR: Patterns of variation in socially selected characters demonstrate the wisdom of Darwin's distinction between natural and sexual selection, and the applicability of sexual selection theory to social competition in general.
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Ecological Sources of Selection on Avian Sounds
TL;DR: In this article, sound propagation tests were made in forest, edge, and grassland habitats in Panama to quantify pure tone and random noise band sound transmission levels, and the sounds of birds in each habitat were analyzed to determine the emphasized frequency, frequency range, and sound type (whether pure tonelike or highly modulated).
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Evidence for Ecological Speciation and Its Alternative
TL;DR: Tests of parallel evolution of reproductive isolation, trait-based assortative mating, and reproductive isolation by active selection have demonstrated that ecological speciation is a common means by which new species arise.
Journal ArticleDOI
Public information: from nosy neighbors to cultural evolution.
TL;DR: A large body of evidence suggests that human decision-making is strongly influenced by the behavior of others, which may then affect biological evolution.