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94 results for “acoustic signals”
Figure 3 in Geographic variation in the acoustic signals of lesser treefrogs Dendropsophus minutus (Anura, Hylidae)
Figure 3. Variation in frequency (PC1) and bandwidth (PC2) of Dendropsophus minutus calls as a function of longitude. 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).
Data from: Sympatric wren-warblers partition acoustic signal space and song perch height
Animals employing acoustic signals, such as birds, must effectively communicate over both background noise and potentially attenuating objects in the environment. To surmount these obstacles, animals evolve species-specific acoustic signals that do not overlap with sources of interference (such as songs of close relatives), and issue these songs from locations that maximize transmission. In multispecies assemblages of birds, the acoustic resource may thus be interspecifically partitioned along multiple axes, including song perch height and signal space. However, very few such studies have focused on open habitats, where differences in sound transmission patterns and limited availability of song perches may drive competition across multiple axes within signal space. Here, we demonstrate acoustic signal space partitioning in four sympatric species of wren-warbler (Cisticolidae, Prinia), in an Indian dry deciduous scrub-grassland habitat. We found that the breeding songs of the four species partition acoustic signal space, resulting in interspecific community organization. Within each species' signal space, we uncovered different intraspecific patterns in note diversity. Two species partitioned intraspecific signal space into multiple note types, whereas the other two varied note repetition rate to different extents. Finally, we found that the four species also partition song perch heights, thus exhibiting acoustic niche separation along multiple axes. We hypothesize that divergent song perch heights may be driven by competition for higher singing perches or other ecological factors rather than signal propagation. Acoustic signal partitioning along multiple axes may therefore arise from a combination of diverse ecological processes.
Binaural detection thresholds and audio quality of speech and music signals in complex acoustic environments
<p>Every-day acoustical environments are often complex, typically comprising one attended target sound in the presence of interfering sounds (e.g., disturbing conversations) and reverberation. Here we assessed binaural detection thresholds and (supra-threshold) binaural audio quality ratings of four distortions types: spectral ripples, non-linear saturation, intensity and spatial modifications applied to speech, guitar, and noise targets in such complex acoustic environments (CAEs). The target and (up to) two masker sounds were either co-located as if contained in a common audio stream, or were spatially separated as if originating from different sound sources. The amount of reverberation was systematically varied. Masker and reverberation had a significant effect on the distortion-detection thresholds of speech signals. Quality ratings were affected by reverberation, whereas the effect of maskers depended on the distortion. The results suggest that detection thresholds and quality ratings for distorted speech in anechoic conditions are also valid for rooms with mild reverberation, but not for moderate reverberation. Furthermore, for spectral ripples, a significant relationship between the listeners’ individual detection thresholds and quality ratings was found. The current results provide baseline data for detection thresholds and audio quality ratings of different distortions of a target sound in CAEs, supporting the future development of binaural auditory models.</p>
Data from: Sympatric wren-warblers partition acoustic signal space and song perch height
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Data from: Environmental variability and acoustic signals: A multilevel approach in songbirds
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Identification of transient seismo-acoustic signals from crashing ocean waves: Template matching and location of discrete surf events
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Data from: Phenotypic integration and the evolution of signal repertoires: a case study of treefrog acoustic communication
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Data and code to run birdnet-discovery, a pipeline for signal discovery and training dataset creation using BirdNET embeddings, including example data from acoustic ARUs in Northern Alaska
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Data from: Bill morphology and neutral genetic structure both predict variation in acoustic signals within a bird population
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Spoiled for choice: Number of signalers constrains mate choice based on acoustic signals
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Body condition and acoustic noise modify female responses to uni- and multimodal signals emitted by a male-mimicking robot frog
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Data for: Sensory biases in response to novel complex acoustic signals in male and female gray treefrogs, Hyla chrysoscelis
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Neotropical birds respond innately to unfamiliar acoustic signals dataset
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Hourly acoustic presence of Cuvier’s beaked whales and anthropogenic signals near Guadalupe Island, México
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Asymmetric acoustic signal recognition led to asymmetric genetic introgression between two parapatric rhacophorid treefrogs
<p><span>Correct discrimination between courtship signals could help maintain genetic integrity between closely related species. However, asymmetric usage of signals might cause asymmetric magnitude of gene flow across the contact zone. <i>Buergeria japonica </i>and <i>B. otai </i>are sibling species with parapatric distribution pattern in Taiwan, forming two narrow contact zones in eastern and western sides of the island. Both species use a shared acoustic signal of calls (Type 1a/1b), whereas <i>B. otai </i>presents another unique call type (Type 2) which never appears in <i>B. japonica</i>. Combining behavioral experiments with genome-wide RAD-seq analyses, we aim to test whether the ability of signal recognition influences genetic introgression across their species boundary. The playback experiments showed that the western population of <i>B. otai</i> has evolved a stronger level of reproductive character displacement by showing the inclusive usage of their unique Type 2 signal. In contrast, the eastern population used both unique and shared signals and has a stronger preference for the latter. Consistent with behavioral difference, genetic introgression across the contact zone was detected only in the eastern boundary but not in the western one. Furthermore, the gene flow in this contact zone tends to be unidirectional from <i>B. japonica</i> toward <i>B. otai</i>. Our results support the prediction that a more specialized signal user might have a higher probability to maintain their genetic integrity compared to a generalized signal user.</span></p>
Data from: Silent katydid females are at higher risk of bat predation than acoustically signalling katydid males
Males that produce conspicuous mate attraction signals are often at high risk of predation from eavesdropping predators. Females of such species typically search for signalling males and their higher motility may also place them at risk. The relative predation risk faced by males and females in the context of mate-finding using long-distance signals has rarely been investigated. In this study, we show, using a combination of diet analysis and behavioural experiments, that katydid females, who do not produce acoustic signals, are at higher risk of predation from a major bat predator, Megaderma spasma, than calling males. Female katydids were represented in much higher numbers than males in the culled remains beneath roosts of M. spasma. Playback experiments using katydid calls revealed that male calls were approached in only about one-third of the trials overall, whereas tethered, flying katydids were always approached and attacked. Our results question the idea that necessary costs of mate-finding, including risk of predation, are higher in signalling males than in searching females.
Data from: The potential influence of morphology on the evolutionary divergence of an acoustic signal.
The evolution of acoustic behaviour and that of the morphological traits mediating its production are often coupled. Lack of variation in the underlying morphology of signalling traits has the potential to constrain signal evolution. This relationship is particularly likely in field crickets, where males produce acoustic advertisement signals to attract females by stridulating with specialized structures on their forewings. In this study, we characterize the size and geometric shape of the forewings of males from six allopatric populations of the black field cricket (Teleogryllus commodus) known to have divergent advertisement calls. We sample from each of these populations using both wild-caught and common-garden-reared cohorts, allowing us to test for multivariate relationships between wing morphology and call structure. We show that the allometry of shape has diverged across populations. However, there was a surprisingly small amount of covariation between wing shape and call structure within populations. Given the importance of male size for sexual selection in crickets, the divergence we observe among populations has the potential to influence the evolution of advertisement calls in this species
Data from: Geographic variation in the Pine Barrens Treefrog (Hyla andersonii): concordance of genetic, morphometric, and acoustic signal data
Delimiting species is important to every subfield in biology. Templeton's cohesion species concept uses genetic and ecological exchangeability to identify sets of populations that ought to be considered as the same species, and the lack of exchangeability helps determine which populations can be grouped as evolutionarily significant units (ESU) in conservation science. However, previous work assessing genetic and ecological interchangeability among populations has been limited in scope. Here, we provide a method for assessing exchangeability that incorporates multiple, independent lines of multivariate evidence in genetic, behavioural and morphological data. We use this approach to assess exchangeability across three disjunct groups of populations of the Pine Barrens Treefrog (Hyla andersonii) from the eastern United States. This species is considered threatened by each state in which it occurs and conservation management of this taxon requires a clearer understanding of how populations in these three regions may differ from one another. We find a strikingly concordant pattern in which the first axis of variation for each of the three types of data distinguishes populations along a latitudinal gradient and the second axis distinguishes the set of populations occurring in the Carolinas from those occurring in the New Jersey and Florida/Alabama regions. We know of no comparable data set that displays such concordance among different types of data across so large a geographic range. The overlap in trait values (i.e. exchangeability) between neighbouring regions, however, is substantial in all three types of data, which supports continued consideration of this taxon as a single species.
FIGURES 40–53 in Review of the genus Taurotettix Haupt, 1929 (Homoptera: Cicadellidae: Deltocephalinae: Cicadulini): morphology, acoustic signals, and geographical variability
FIGURES 40–53. Taurotettix spp., male calling signal oscillograms, general view at low speed. 40–42―T. (T.) beckeri, 43– 48―T. (C.) modesta, 49–53―T. (C.) elegans elegans. Faster oscillograms of the parts of signals indicated as "54–69" are given under the same numbers. Scale mark at the bottom is the same for all oscillograms.
FIGURES 1–15 in Review of the genus Taurotettix Haupt, 1929 (Homoptera: Cicadellidae: Deltocephalinae: Cicadulini): morphology, acoustic signals, and geographical variability
FIGURES 1–15. Taurotettix spp., subgenital plates (1–2) and lateral view (3–15). 1, 3―T. (T.) beckeri, 4–7―T. (C.) modesta, 2, 8–11―T. (C.) elegans elegans, 12–15―T. (C.) elegans subornata. 3–8, 10–12, 14–15―males, 9, 13―females. Localities are given under the figures for taxa distributed in multiple regions.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.