Journal ArticleDOI
Evolutionary divergence in acoustic signals: causes and consequences
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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
Electric pulse characteristics can enable species recognition in African weakly electric fish species
Rebecca Nagel,Frank Kirschbaum,Volker Hofmann,Volker Hofmann,Jacob Engelmann,Ralph Tiedemann +5 more
TL;DR: Mapped onto a recent phylogeny, the results suggest that discrimination by electric cues alone may be an apomorphic trait evolved during a recent radiation in this taxon.
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Genetic drift does not sufficiently explain patterns of electric signal variation among populations of the mormyrid electric fish Paramormyrops kingsleyae
TL;DR: Using a habituation‐dishabituation assay, it is found that P. kingsleyae can discriminate between biphasic and triphasic EOD types, providing evidence for hybridization between these signal types.
Journal ArticleDOI
Body slap: An innovative aggressive display by breeding male gray seals (Halichoerus grypus)
TL;DR: It is suggested that the Body Slap carries information about male resource holding potential and does not signal submission, which furthers the understanding of geographic variants of male threat behaviors and of pinniped nonvocal communication.
Journal ArticleDOI
Sexual selection and population divergence III. interspecific and intraspecific variation in mating signals
TL;DR: Different environmental associations found for song and CHCs suggest that the impact of ecological selection on population divergence, and how that influences speciation, might be different for acoustic versus chemical signals.
Journal ArticleDOI
The roles of geography, climate and sexual selection in driving divergence among insect populations on mountaintops
TL;DR: In populations of a specialized alpine species, the role of geography and climate in the divergence of genetic, morphological and acoustic characters is explored, and the functional consequences of variation on mate choice are analyzed.
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.
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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.