In this study, we describe the calls emitted by Dendropsophus microps, a species of frog in the family Hylidae, in Serra da Mantiqueira, Campos do Jordão, São Paulo, Brazil, and evaluate their functions in the social context using playback experiments. Based on these findings, we conclude that the ADR method has potentially valuable applications for the collection of data on the natural history of anuran species, as well as supplying important insights for conservation initiatives. The results of the analytical model also indicate that calling patterns were related to minimum (but not maximum) air temperatures and precipitation, which may be related to their reproductive and thermoregulatory requirements. The ADR provides a fine-scale description of the nocturnal calling pattern, as well as the oscillations between the rainy and dry seasons. fuscomarginatus has a prolonged breeding pattern. The analysis of the 43.2 hours of acoustic recording showed that S. We conducted the recordings at five ponds in the Cerrado savanna of Rio Verde Municipality, in Goiás state between November 2013 and October 2014. We also evaluated the role of climatic variables (air temperature and precipitation) on calling activity by using a Generalized Additive Model (GAM). In the present study, we used an automated digital recorder (ADR) to describe the temporal variation in the calling activity of Scinax fuscomarginatus (Lutz, 1925) in central Brazil. These findings suggest that vocal adjustment (acoustic plasticity) or character displacement (local adaptation) may enlarge acoustic divergence in advertisement calls, reinforcing reproductive isolation and reducing interspecific competition for acoustic space in sister taxa.īioacoustics is an effective way of recording detailed data during population surveys and monitoring. In contrast, morphological and environmental factors had little influence on acoustic parameters, with only body size affecting dominant frequency in B. While the smaller-sized species, Boana bischoffi, increased dominant frequency in syntopy, Boana prasina prolonged call duration, both increasing acoustic divergence between these sister species. Our results revealed differences in call parameters between syntopy and allotopy, each species showing a specific response. Here we examined acoustic divergence in the advertisement calls of two closely related neotropical treefrogs that share similar signals, habitat, and phenology, and that hybridise in nature. Although well-documented in temperate regions, these phenomena have been less investigated in tropical communities, characterised by more complex interactions and saturated acoustic spaces. Consequently, natural selection favours acoustic divergence in sympatry through behavioural plasticity or character displacement. Phylogenetic inertia often drives sister species to exhibit similar acoustic signals, compromising species recognition and increasing competition for acoustic space.

We also discuss the role of the stereotyped acoustic features on mate choice and intraspecific distinction. fuscomarginatus show sufficient statistical differences for interindividual and interpopulation distinction. Hence, we suggest the advertisement call features of male S. MANOVA performed with PCA scores indicates that call traits are different among populations. 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. The advertisement call structure consisted of a single multipulsed note with stereotyped acoustic features. 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. Fieldworks were carried out during eight breeding seasons, from 2008 to 2016. We examined 635 advertisement calls of 127 individuals from 10 populations in Central Brazil.

Here, we report on the advertisement call variation of male Scinax fuscomarginatus at three levels: within-individual, between-individual, among-populations. 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.

Ubar itirapina