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41 results for “acoustic variation”
Data for: Collective signalling is shaped by feedbacks between signaller variation, receiver perception, and acoustic environment in a simulated communication network
<p>Communication takes place within a network of multiple signallers and receivers. Social network analysis provides tools to quantify how an individual's social positioning affects group dynamics, and the subsequent biological consequences. However, network analysis is rarely applied to animal communication, likely due to the logistical difficulties of monitoring natural communication networks. We generated a simulated communication network to investigate how variation in individual communication behaviours generates network effects, and how this communication network's structure feeds back to affect future signalling interactions. We simulated competitive acoustic signalling interactions among chorusing individuals and varied several parameters related to communication and chorus size to examine their effects on calling output and social connections. Larger choruses had higher noise levels, and this reduced network density and altered the relationships between individual traits and communication network position. Hearing sensitivity interacted with chorus size to affect both individuals' positions in the network and the acoustic output of the chorus. Physical proximity to competitors influenced signalling, but a distinctive communication network structure emerged when signal active space was limited. Our model raises novel predictions about communication networks that could be tested experimentally, and identifies aspects of information processing in complex environments that remain to be investigated. </p>
FIGURE 5 in INTRASPECIFIC VARIATION IN ACOUSTIC TRAITS AND BODY SIZE, AND NEW DISTRIBUTIONAL RECORDS FOR PSEUDOPALUDICOLA GIARETTAI CARVALHO, 2012 (ANURA, LEPTODACTYLIDAE, LEIUPERINAE): IMPLICATIONS FOR ITS CONGENERIC DIAGNOSIS
FIGURE 5: Scatterplot of the first two principal component scores (PCs) from acoustic traits of six populations of P. giarettai. Yellow (Curvelo; type locality); purple (Chapada Gaúcha); green (Coromandel); red (Buritis); blue (Buritizeiro); pink (Unaí).
FIGURE 3 in INTRASPECIFIC VARIATION IN ACOUSTIC TRAITS AND BODY SIZE, AND NEW DISTRIBUTIONAL RECORDS FOR PSEUDOPALUDICOLA GIARETTAI CARVALHO, 2012 (ANURA, LEPTODACTYLIDAE, LEIUPERINAE): IMPLICATIONS FOR ITS CONGENERIC DIAGNOSIS
FIGURE 3: Advertisement call of P. giarettai from the type locality (Curvelo, Minas Gerais). From top to bottom: oscillogram section (ca. 1.6 s) depicting calling pattern, waveform, spectrogram, and power spectrum of the second advertisement from oscillogram section. Sound energy with relative amplitude below 40 dB was clipped to zero dB to remove background noise from power spectrum.
FIGURE 2 in INTRASPECIFIC VARIATION IN ACOUSTIC TRAITS AND BODY SIZE, AND NEW DISTRIBUTIONAL RECORDS FOR PSEUDOPALUDICOLA GIARETTAI CARVALHO, 2012 (ANURA, LEPTODACTYLIDAE, LEIUPERINAE): IMPLICATIONS FOR ITS CONGENERIC DIAGNOSIS
FIGURE 2: Adult specimens of P. giarettai in life from: Above – Parque Nacional Grande Sertão Veredas, Chapada Gaúcha, Minas Gerais (voucher male AAG-UFU 1920: CRC = 14.6 mm); Below – Coromandel (female AAG-UFU 3566: CRC 18.8 mm).
FIGURE 4 in INTRASPECIFIC VARIATION IN ACOUSTIC TRAITS AND BODY SIZE, AND NEW DISTRIBUTIONAL RECORDS FOR PSEUDOPALUDICOLA GIARETTAI CARVALHO, 2012 (ANURA, LEPTODACTYLIDAE, LEIUPERINAE): IMPLICATIONS FOR ITS CONGENERIC DIAGNOSIS
FIGURE 4: Advertisement call of P. giarettai from the Parque Nacional Grande Sertão Veredas (Chapada Gaúcha, Minas Gerais). From top to bottom: oscillogram section (ca. 1.6 s) depicting calling pattern, waveform, spectrogram, and power spectrum of the second advertisement from oscillogram section. Sound energy with relative amplitude below 40 dB was clipped to zero dB to remove background noise from power spectrum.
FIGURE 6 in INTRASPECIFIC VARIATION IN ACOUSTIC TRAITS AND BODY SIZE, AND NEW DISTRIBUTIONAL RECORDS FOR PSEUDOPALUDICOLA GIARETTAI CARVALHO, 2012 (ANURA, LEPTODACTYLIDAE, LEIUPERINAE): IMPLICATIONS FOR ITS CONGENERIC DIAGNOSIS
FIGURE 6: Typical breeding habitat of P. giarettai: a permanent pond associated with a Buriti palm grove marsh at the Parque Nacional Grande Sertão Veredas (Municipality of Chapada Gaúcha), northwestern Minas Gerais, southeastern Brazil.
FIGURE 1 in INTRASPECIFIC VARIATION IN ACOUSTIC TRAITS AND BODY SIZE, AND NEW DISTRIBUTIONAL RECORDS FOR PSEUDOPALUDICOLA GIARETTAI CARVALHO, 2012 (ANURA, LEPTODACTYLIDAE, LEIUPERINAE): IMPLICATIONS FOR ITS CONGENERIC DIAGNOSIS
FIGURE 1: Distribution map of Pseudopaludicola giarettai. Star (Type locality: Curvelo, MG); Circles (localities in Minas Gerais): 1 (Buritis), 2 (Chapada Gaúcha), 3 (Unaí), 4 (Buritizeiro), 5 (Coromandel), 6 (Conceição do Mato Dentro; Pimenta et al., 2014), 7 (Muriaé; Santana et al., 2009); Triangle (Flores de Goiás, GO). MG = Minas Gerais; GO = Goiás.
Dataset for "Acoustic voice variation within and between speakers"
<p>This dataset accompanies the article "Acoustic voice variation within and between speakers" in the <em>Journal of Acoustical Society of America</em>.</p>
Fig. 7 in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 7. Box plot of the morphometric traits that differed statistically (Mann-Whitney, p <0.0039) between allopatric (Allo) and sympatric (Sym) populations of A – Tettigettalna argentata and B – Tettigettalna mariae. All measurements are in millimetres. See Table 2 for description of the morphometric traits.
Fig. 6 in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 6. Scatter plot of the 69 Tettigettalna argentata and Tettigettalna mariae occurring allopatrically (Allo) and sympatrically (Sym) in the first two PCA components extracted from a correlation matrix composed of 13 acoustic variables. See ST3 for details of the Eigen analysis and factor loadings.
Fig. 4 in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 4. Scatter plot of the 176 specimens of Tettigettalna in the two PCA components extracted from a correlation matrix composed of 22 morphometric traits. See ST2 for details of the Eigen analysis and factor loadings.
Fig. 2 in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 2. The traits of external morphology of specimens of Tettigettalna measured. A – dorsal view; B – ventral view of the head; C – anterior femur; D – operculum; E – tymbal; F – anterior wing; G – posterior wing. (See Table 2 for detailed description).
Fig. 8 in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 8. Scatter plot of the 50 Tettigettalna argentata and Tettigettalna mariae occurring allopatrically (Allo) and sympatrically (Sym) in the first two PCA components extracted from a correlation matrix composed of measurements of 22 morphometric traits. See ST4 for details of the Eigen analysis and factor loadings.
Fig. 5 in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 5. Box plot of the acoustic variables that differed statistically (Mann-Whitney, p <0.0039) between allopatric (Allo) and sympatric (Sym) populations of A – Tettigettalna argentata and B – Tettigettalna mariae. Time is in seconds and frequency in kHz.
Fig. 3 in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 3. Scatter plot of the 193 specimens of Tettigettalna in the first two PCA components extracted from a correlation matrix composed of 13 acoustic variables. See ST1 in Supplementary Tables for details of the Eigen analysis and factor loadings.
Fig. 1. A in Patterns of acoustic and morphometric variation in species of genus Tettigettalna (Hemiptera: Cicadidae): Sympatric populations show unexpected differences
Fig. 1. A – Map of the south-western part of the Iberian Peninsula showing the locations of the allopatric and sympatric populations of the four species of Tettigettalna sampled. B – More detailed map of the area marked by the rectangle in A. Letters: allopatric populations of: a – T. argentata; e – T. estrellae; j – T. josei and m – T. mariae. Symbols: Sympatric populations of: circle – T. argentata and T. estrellae; square – T. argentata and T. josei; triangle: T. argentata and T. mariae and cross: T. argentata, T. mariae and T. josei. Map produced by the program DIVA_GIS (LizardTechSeattle, USA) using the spatial data provided by this program.
Data for: Collective signalling is shaped by feedbacks between signaller variation, receiver perception, and acoustic environment in a simulated communication network
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Figure 1 in Geographic variation in the acoustic signals of lesser treefrogs Dendropsophus minutus (Anura, Hylidae)
Figure 1. Spectrogram (above) and oscillogram (below) showing the acoustic characteristics of examples of the three note types of the vocal repertoire of Dendropsophus minutus. Recording identity: FNJV_13108 (Table S1). Recordist: Célio Haddad. Coordinates: −47.0697 (longitude), −22.8194 (latitude).
Figure 4 in Geographic variation in the acoustic signals of lesser treefrogs Dendropsophus minutus (Anura, Hylidae)
Figure 4. Variation in frequency bandwidth (PC2) and note duration (s) of Dendropsophus minutus calls as a function of mean annual temperature and annual precipitation. Mean trend lines and confidence intervals (95%) are shown. Each point represents the average acoustic parameter for each note type on each recording (i.e., individual). 2010; Morais et al., 2012; Llusia et al., 2013a; Annibale tics of anuran calls at short (Morais et al., 2012; Llusia et al., et al., 2020). 2013a) and possibly at longer time scales (this study). Call rate often increases with increasing air tempera- High-pitched sounds attenuate more quickly than lowture in anurans as a result of higher metabolic rate and pitched sounds, i.e., high-pitched sounds lose energy fastenergy expenditure (Wells, 2010). For example, in chaco er as they propagate away from the sound source (Brown treefrogs (Boana raniceps) (Cope, 1862), males produce & Riede, 2017). Additionally, high temperatures and low shorter calls, but in greater numbers, as the air tempera- humidity favor sound absorption (Snell-Rood, 2012), ture increases (Guimarães & Bastos, 2003). Given the which impairs sound propagation. We suggest that male recording′s limited duration, we could not measure call lesser treefrogs modulate call bandwidth to optimize sigrates. Yet, we speculate that in warmer temperatures, nal propagation depending on the air temperature. lesser treefrogs produce shorter notes at a higher rate, The call notes of D. minutus were shorter in sites optimizing call transmission while conserving energy with accumulated annual rainfall greater than 2000mm (Lingnau & Bastos, 2007). (Fig. 4D). We already expected that these acoustic signals Here, in addition to note duration, note bandwidth would vary with precipitation since relative humidity (represented by PC2, Table 1), but not note pitch (PC1), modulates the reproduction of many amphibian species decreased with increasing temperature (Fig. 4A). As (Aichinger, 1987; Llusia et al., 2013b). Rain noise can mask shown above, air temperature strongly affects the acous- anuran calls, reduce their acoustic activity (Ospina et al.,
Figure 2 in Geographic variation in the acoustic signals of lesser treefrogs Dendropsophus minutus (Anura, Hylidae)
Figure 2. Geographical scope of the sound recordings samples (n = 87) of the species Dendropsophus minutus in South America. Polygon (beige) represents the entire distribution, according to the spatial data made available by the International Union for Conservation of Nature (IUCN). Dots (yellow) represent the locations where the recordings were made. It is noteworthy that some recordings were made at the same geographical point, but with different individuals.
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