@article {58445, title = {Intraspecific advertisement call variation of Scinax fuscomarginatus (Lutz, 1925) from Central Brazil}, journal = {Studies on Neotropical Fauna and Environment}, year = {2021}, abstract = {

Quantitative analysis of the acoustic communication system in anurans is a relevant step toward understanding how acoustic traits variation is related to conspecific recognition and discrimination. Here, we report on the advertisement call variation of male Scinax fuscomarginatus at three levels: within-individual, between-individual, among-populations. We examined 635 advertisement calls of 127 individuals from 10 populations in Central Brazil. Fieldworks were carried out during eight breeding seasons, from 2008 to 2016. We used the coefficient of variation (CV), Analysis of Variance (ANOVA), Principal Component Analysis (PCA) and Multivariate Analysis of Variance (MANOVA) to evaluate whether the call features differed statistically. The advertisement call structure consisted of a single multipulsed note with stereotyped acoustic features. These features were statistically different at between-individual level and the relative variability (CV) was higher between-individual than within-individual of the same population. MANOVA performed with PCA scores indicates that call traits are different among populations. Hence, we suggest the advertisement call features of male S. fuscomarginatus show sufficient statistical differences for interindividual and interpopulation distinction. We also discuss the role of the stereotyped acoustic features on mate choice and intraspecific distinction.

}, keywords = {Anuran communication, calling behavior, dynamic property, mate choice, Signal features, static property}, doi = {10.1080/01650521.2021.1978212}, author = {Antonio Ol{\'\i}mpio de Souza and Seixas Rezende Oliveira and Rog{\'e}rio Pereira Bastos and Alessandro Ribeiro Morais} } @article {53414, title = {Behavioral and neural auditory thresholds in a frog}, journal = {Current Zoology}, year = {2018}, abstract = {

Vocalizations play a critical role in mate recognition and mate choice in a number of taxa, especially, but not limited to, orthopterans, frogs, and birds. But receivers can only recognize and prefer sounds that they can hear. Thus a fundamental question linking neurobiology and sexual selection asks\— what is the threshold for detecting acoustic sexual displays? In this study we use three methods to assess such thresholds in t\úngara frogs: behavioral responses, auditory brainstem responses, and multi-unit electrophysiological recordings from the midbrain. We show that thresholds are lowest for multi-unit recordings (ca. 45 dB SPL), and then for behavioral responses (ca. 61 dB SPL), with auditory brainstem responses exhibiting the highest thresholds (ca. 71 dB SPL). We discuss why these estimates differ and why, as with other studies, it is unlikely that they should be the same. Although all of these studies estimate thresholds they are not measuring the same thresholds; behavioral thresholds are based on signal salience while the two neural assays estimate physiological thresholds. All three estimates, however, make it clear that to have an appreciation for detection and salience of acoustic signals we must listen to those signals through the ears of the receivers.

}, keywords = {anurans, auditory brainstem responses, auditory thresholds, mate choice, Physalaemus pustulosus, sexual selection, signal recognition thresholds, t{\'u}ngara frogs, vocalizations}, author = {Ryan, C and Akre, Karin and Wilczynski, Walter and others} } @article {52579, title = {Mate choice intensifies motor signalling in Drosophila}, journal = {Animal Behaviour}, volume = {133}, year = {2017}, month = {Jan-11-2017}, pages = {169 - 187}, abstract = {

Mate choice has the potential to act on the evolution of motor performance via its direct influence on motor sexual signals. However, studies demonstrating this are rare. Here, we performed an in-depth analysis of Drosophila pseudoobscura courtship song rate, a motor signal under mate choice in this species, and analysed the response of this signal to sexual selection manipulation using experimental evolution. We show that manipulating the opportunity for sexual selection led to changes in song production rate and singing endurance, with males from the polyandrous populations producing faster song rates over longer time periods than males from monogamous populations. We also show that song rate was correlated with estimates of overall courtship vigour. Our results suggest that the action of mate choice on a motor signal has affected male motor performance displayed during courtship. We consider potential selective benefits associated with changes in motor performance, including condition- dependent signalling, and discuss the implications of these results for the study of motor signals un- der sexual selection.

}, keywords = {courtship song, Drosophila pseudoobscura, experimental evolution, interpulse interval, mate choice, motor performance, sexual selection}, issn = {00033472}, doi = {10.1016/j.anbehav.2017.09.014}, url = {http://linkinghub.elsevier.com/retrieve/pii/S0003347217303019}, author = {Debelle, Allan and Courtiol, Alexandre and Ritchie, Michael G. and Snook, Rhonda R.} } @article {52575, title = {Interactions between complex multisensory signal components result in unexpected mate choice responses}, journal = {Animal Behaviour}, volume = {134}, year = {2017}, month = {Jan-12-2017}, pages = {239 - 247}, abstract = {

Multimodal (multisensory) signalling is common in many species and often facilitates communication. How receivers integrate individual signal components of multisensory displays, especially with regard to variance in signal complexity, has received relatively little attention. In nature, male t\úngara frogs, Physalaemus pustulosus, produce multisensory courtship signals by vocalizing and presenting their inflating and deflating vocal sac as a visual cue. Males can produce a simple call (whine only) or a complex call (whine \þ one or more chucks). In a series of two-choice experiments, we tested female preferences for variation in acoustic call complexity and amplitude (unimodal signals). We then tested preferences for the same calls when a dynamic robotic frog was added to one call, generating a multi- modal stimulus. Females preferred a complex call to a simple call; when both calls contained at least one chuck, additional numbers of chucks did not further increase attractiveness. When calls contained zero or one chuck, the visual stimulus of the robofrog increased call attractiveness. When calls contained multiple chucks, however, the visual component failed to enhance call attractiveness. Females also preferred higher amplitude calls and the addition of the visual component to a lower amplitude call did not alter this preference. At relatively small amplitude differences, however, the visual signal increased overall discrimination between the calls. These results indicate that the visual signal component does not provide simple enhancement of call attractiveness. Instead, females integrate multisensory components in a nonlinear fashion. The resulting perception and behavioural response to complex signals probably evolved in response to animals that communicate in noisy environments.

}, keywords = {anurans, mate choice, multimodal signalling, nonlinear interactions, sexual selection, signal weighting, t{\'u}ngara frog, vocal sac}, issn = {00033472}, doi = {10.1016/j.anbehav.2016.07.005}, url = {http://linkinghub.elsevier.com/retrieve/pii/S000334721630121X}, author = {Stange, Nicole and Rachel A. Page and Michael J. Ryan and Taylor, Ryan C.} } @article {47809, title = {Long-distance signals influence assessment of close range mating displays in the field cricket, Gryllus integer}, journal = {Biological Journal of the Linnean Society}, volume = {100}, year = {2010}, month = {Jan-08-2010}, pages = {856 - 865}, abstract = {

Male sexual displays often include components detected across long distances, and those perceived only at close range. Understanding what information females gain from each component of a complex display and how they use these signals to make decisions are questions of major interest in sexual selection research. We evaluated content-based hypotheses (\‘redundant signals\’ and \‘multiple messages\’) for the courtship displays of field crickets (Gryllus integer) by measuring female responses to males\’ long-distance calling song (calls) and close-range chemical cues. Females\’ responses to a male\’s calls and chemical cues were uncorrelated, supporting the \‘multiple messages\’ hypothesis. We also tested the \‘inter-signal interaction\’ hypothesis by investigating how long-distance calls influence evaluation of close-range courtship. The relationship between long- and close-range signals was complex and conditional: females accepted close-range courtship more quickly after exposure to attractive calling song than they did after exposure to either unattractive calling song or silence, and unattractive calls were no more or less effective than silence. This inter-signal interaction could affect our understanding of mate choice in species with multiple mating signals because it implies that females may save time and energy by not assessing the close-range signals of attractive long-distance signalers.

}, keywords = {acoustic signal, chemical cues, courtship, mate choice, multimodal signals, multiple cues, multiple messages, redundant signals}, doi = {10.1111/bij.2010.100.issue-410.1111/j.1095-8312.2010.01472.x}, url = {http://blackwell-synergy.com/doi/abs/10.1111/bij.2010.100.issue-4https://academic.oup.com/biolinnean/article-lookup/doi/10.1111/j.1095-8312.2010.01472.xhttps://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111\%2Fj.1095-8312.2010.01472.x}, author = {Anne S. Leonard and Ann V. Hedrick} }