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https://www.readbyqxmd.com/read/29430205/species-limits-within-the-widespread-amazonian-treefrog-dendropsophus-parviceps-with-descriptions-of-two-new-species-anura-hylidae
#1
C Daniel Rivadeneira, Pablo J Venegas, Santiago R Ron
The genus Dendropsophus is one of the most speciose among Neotropical anurans and its number of described species is increasing. Herein, molecular, morphological, and bioacoustic evidence are combined to assess species limits within D. parviceps, a widely distributed species in the Amazon Basin. Phylogenetic relationships were assessed using 3040 bp sequences of mitochondrial DNA, genes 12S, ND1, and CO1. The phylogeny shows three well-supported clades. Bioacoustic and morphological divergence is congruent with those clades demonstrating that Dendropsophus parviceps is a species complex...
2018: ZooKeys
https://www.readbyqxmd.com/read/29390774/acoustical-standards-news
#2
Neil B Stremmel, Christopher J Struck
American National Standards (ANSI Standards) developed by Accredited Standards Committees S1, S2, S3, S3/SC 1, and S12 in the areas of acoustics, mechanical vibration and shock, bioacoustics, animal bioacoustics, and noise, respectively, are published by the Acoustical Society of America (ASA). In addition to these standards, ASA publishes a catalog of Acoustical American National Standards. To receive a copy of the latest Standards catalog, please contact Neil Stremmel.Comments are welcomed on all material in Acoustical Standards News...
January 2018: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29390742/comment-on-temporal-and-spatial-variation-in-harbor-seal-phoca-vitulina-l-roar-calls-from-southern-scandinavia-j-acoust-soc-am-141-1824-1834-2017
#3
Andrea Ravignani
In their recent article, Sabinsky and colleagues investigated heterogeneity in harbor seals' vocalizations. The authors found seasonal and geographical variation in acoustic parameters, warning readers that recording conditions might account for some of their results. This paper expands on the temporal aspect of the encountered heterogeneity in harbor seals' vocalizations. Temporal information is the least susceptible to variable recording conditions. Hence geographical and seasonal variability in roar timing constitutes the most robust finding in the target article...
January 2018: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29381750/the-advertisement-calls-of-brazilian-anurans-historical-review-current-knowledge-and-future-directions
#4
Vinicius Guerra, Diego Llusia, Priscilla Guedes Gambale, Alessandro Ribeiro de Morais, Rafael Márquez, Rogério Pereira Bastos
Advertisement calls are often used as essential basic information in studies of animal behaviour, ecology, evolution, conservation, taxonomy or biodiversity inventories. Yet the description of this type of acoustic signals is far to be completed, especially in tropical regions, and is frequently non-standardized or limited in information, restricting the application of bioacoustics in science. Here we conducted a scientometric review of the described adverstisement calls of anuran species of Brazil, the world richest territory in anurans, to evaluate the amount, standard and trends of the knowledge on this key life-history trait and to identify gaps and directions for future research strategies...
2018: PloS One
https://www.readbyqxmd.com/read/29245621/the-vietnamese-population-of-i-megophrys-i-i-kuatunensis-i-amphibia-megophryidae-represents-a-new-species-of-asian-horned-frog-from-vietnam-and-southern-china
#5
Benjamin Tapley, Timothy Cutajar, Stephen Mahony, Chung Thanh Nguyen, Vinh Quang Dau, Tao Thien Nguyen, Hao VAN Luong, Jodi J L Rowley
The Asian frog genus Megophrys is a diverse group of morphologically conserved, forest-dwelling frogs. The genus harbours highly localised species diversification and new species continue to be described on a regular basis. We examined the taxonomic status of a population of Megophrys frogs from the Hoang Lien Range in northern Vietnam and southern China previously identified as M. kuatunensis (subgenus Panophrys). Preliminary phylogenetic analyses using a fragment of 16S rDNA places the species in question within the Megophrys (subgenus Panophrys) species group, a primarily Chinese radiation within the genus...
November 8, 2017: Zootaxa
https://www.readbyqxmd.com/read/29234024/patterns-of-biophonic-periodicity-on-coral-reefs-in-the-great-barrier-reef
#6
Jamie N McWilliam, Robert D McCauley, Christine Erbe, Miles J G Parsons
The coral reefs surrounding Lizard Island in the Great Barrier Reef have a diverse soundscape that contains an array of bioacoustic phenomena, notably choruses produced by fishes. Six fish choruses identified around Lizard Island exhibited distinctive spatial and temporal patterns from 2014 to 2016. Several choruses displayed site fidelity, indicating that particular sites may represent important habitat for fish species, such as fish spawning aggregations sites. The choruses displayed a broad range of periodicities, from diel to annual, which provides new insights into the ecology of vocalising reef fish species and the surrounding ecosystem...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29195463/acoustical-standards-news
#7
Neil B Stremmel, Christopher J Struck
American National Standards (ANSI Standards) developed by Accredited Standards Committees S1, S2, S3, S3/SC 1, and S12 in the areas of acoustics, mechanical vibration and shock, bioacoustics, animal bioacoustics, and noise, respectively, are published by the Acoustical Society of America (ASA). In addition to these standards, ASA publishes a catalog of Acoustical American National Standards. To receive a copy of the latest Standards catalog, please contact Neil Stremmel.Comments are welcomed on all material in Acoustical Standards News...
November 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29092546/active-learning-for-bird-sound-classification-via-a-kernel-based-extreme-learning-machine
#8
Kun Qian, Zixing Zhang, Alice Baird, Björn Schuller
In recent years, research fields, including ecology, bioacoustics, signal processing, and machine learning, have made bird sound recognition a part of their focus. This has led to significant advancements within the field of ornithology, such as improved understanding of evolution, local biodiversity, mating rituals, and even the implications and realities associated to climate change. The volume of unlabeled bird sound data is now overwhelming, and comparatively little exploration is being made into methods for how best to handle them...
October 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/29065943/invited-review-the-evolution-of-cattle-bioacoustics-and-application-for-advanced-dairy-systems
#9
A C Green, I N Johnston, C E F Clark
Vocalisations are commonly expressed by gregarious animals, including cattle, as a form of short- and long-distance communication. They can provide conspecifics with meaningful information about the physiology, affective state and physical attributes of the caller. In cattle, calls are individually distinct meaning they assist animals to identify specific individuals in the herd. Consequently, there is potential for these vocalisations to be acoustically analysed to make inferences about how individual animals or herds are coping with their external surroundings, and then act on these signals to improve feed conversion efficiency, reproductive efficiency and welfare...
October 25, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28964071/acoustical-standards-news
#10
Neil B Stremmel, Christopher J Struck
American National Standards (ANSI Standards) developed by Accredited Standards Committees S1, S2, S3, S3/SC 1, and S12 in the areas of acoustics, mechanical vibration and shock, bioacoustics, animal bioacoustics, and noise, respectively, are published by the Acoustical Society of America (ASA). In addition to these standards, ASA publishes a catalog of Acoustical American National Standards. To receive a copy of the latest Standards catalog, please contact Neil Stremmel.Comments are welcomed on all material in Acoustical Standards News...
September 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28874852/acoustic-allometry-revisited-morphological-determinants-of-fundamental-frequency-in-primate-vocal-production
#11
Maxime Garcia, Christian T Herbst, Daniel L Bowling, Jacob C Dunn, W Tecumseh Fitch
A fundamental issue in the evolution of communication is the degree to which signals convey accurate ("honest") information about the signaler. In bioacoustics, the assumption that fundamental frequency (f o) should correlate with the body size of the caller is widespread, but this belief has been challenged by various studies, possibly because larynx size and body size can vary independently. In the present comparative study, we conducted excised larynx experiments to investigate this hypothesis rigorously and explore the determinants of f o...
September 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28863778/gene-flow-during-glacial-habitat-shifts-facilitates-character-displacement-in-a-neotropical-flycatcher-radiation
#12
Balaji Chattopadhyay, Kritika M Garg, Chyi Yin Gwee, Scott V Edwards, Frank E Rheindt
BACKGROUND: Pleistocene climatic fluctuations are known to be an engine of biotic diversification at higher latitudes, but their impact on highly diverse tropical areas such as the Andes remains less well-documented. Specifically, while periods of global cooling may have led to fragmentation and differentiation at colder latitudes, they may - at the same time - have led to connectivity among insular patches of montane tropical habitat with unknown consequences on diversification. In the present study we utilized ~5...
September 1, 2017: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/28863601/acoustical-standards-news
#13
Neil B Stremmel, Christopher J Struck
American National Standards (ANSI Standards) developed by Accredited Standards Committees S1, S2, S3, S3/SC 1, and S12 in the areas of acoustics, mechanical vibration and shock, bioacoustics, animal bioacoustics, and noise, respectively, are published by the Acoustical Society of America (ASA). In addition to these standards, ASA publishes a catalog of Acoustical American National Standards. To receive a copy of the latest Standards catalog, please contact Neil B. Stremmel.Comments are welcomed on all material in Acoustical Standards News...
August 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28863585/geographic-variation-in-risso-s-dolphin-echolocation-click-spectra
#14
Melissa S Soldevilla, Simone Baumann-Pickering, Danielle Cholewiak, Lynne E W Hodge, Erin M Oleson, Shannon Rankin
Discrimination of bioacoustic signals to the species or population level is critical for using passive acoustic monitoring to study cetacean ecology. Risso's dolphins off southern California have distinctive peaks and notches in their echolocation clicks, but it was unknown whether Risso's dolphins from other geographic areas have similarly distinctive click spectra and whether populations are acoustically distinct. This study investigates using clicks for species and population identification by characterizing the spectral structure of Risso's dolphin echolocation clicks recorded over wide-ranging geographic regions including the U...
August 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28863178/protax-sound-a-probabilistic-framework-for-automated-animal-sound-identification
#15
Ulisses Moliterno de Camargo, Panu Somervuo, Otso Ovaskainen
Autonomous audio recording is stimulating new field in bioacoustics, with a great promise for conducting cost-effective species surveys. One major current challenge is the lack of reliable classifiers capable of multi-species identification. We present PROTAX-Sound, a statistical framework to perform probabilistic classification of animal sounds. PROTAX-Sound is based on a multinomial regression model, and it can utilize as predictors any kind of sound features or classifications produced by other existing algorithms...
2017: PloS One
https://www.readbyqxmd.com/read/28809924/species-delimitation-in-frogs-from-south-american-temperate-forests-the-case-of-eupsophus-a-taxonomically-complex-genus-with-high-phenotypic-variation
#16
Claudio Correa, Dayana Vásquez, Camila Castro-Carrasco, Álvaro Zúñiga-Reinoso, Juan Carlos Ortiz, R Eduardo Palma
One of the most characteristic and abundant amphibian taxa of South American temperate forests is Eupsophus. The ten currently recognized species of the genus have been divided in two species groups, roseus and vertebralis, but most of them, eight, belong to the roseus group. Recent phylogeographic and phylogenetic studies have suggested that species diversity of the roseus group could be underestimated. An examination of the literature shows that species of the roseus group exhibit high levels of variation in their external characteristics, particularly those used as diagnostic characters, which compromises their taxonomy and hinders their field recognition...
2017: PloS One
https://www.readbyqxmd.com/read/28769667/molecular-morphological-and-acoustic-assessment-of-the-genus-ophryophryne-anura-megophryidae-from-langbian-plateau-southern-vietnam-with-description-of-a-new-species
#17
Nikolay A Poyarkov Jr, Tang Van Duong, Nikolai L Orlov, Svetlana S Gogoleva, Anna B Vassilieva, Luan Thanh Nguyen, Vu Dang Hoang Nguyen, Sang Ngoc Nguyen, Jing Che, Stephen Mahony
Asian Mountain Toads (Ophryophryne) are a poorly known genus of mostly small-sized anurans from southeastern China and Indochina. To shed light on the systematics within this group, the most comprehensive mitochondrial DNA phylogeny for the genus to date is presented, and the taxonomy and biogeography of this group is discussed. Complimented with extensive morphological data (including associated statistical analyses), molecular data indicates that the Langbian Plateau, in the southern Annamite Mountains, Vietnam, is one of the diversity centres of this genus where three often sympatric species of Ophryophryne are found, O...
2017: ZooKeys
https://www.readbyqxmd.com/read/28764431/bat-bioacoustics
#18
Whitlow W L Au
No abstract text is available yet for this article.
July 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28725381/extending-bioacoustic-monitoring-of-birds-aloft-through-flight-call-localization-with-a-three-dimensional-microphone-array
#19
Phillip M Stepanian, Kyle G Horton, David C Hille, Charlotte E Wainwright, Phillip B Chilson, Jeffrey F Kelly
Bioacoustic localization of bird vocalizations provides unattended observations of the location of calling individuals in many field applications. While this technique has been successful in monitoring terrestrial distributions of calling birds, no published study has applied these methods to migrating birds in flight. The value of nocturnal flight call recordings can increase with the addition of three-dimensional position retrievals, which can be achieved with adjustments to existing localization techniques...
October 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/28686679/the-acoustic-repertoire-and-behavioural-context-of-the-vocalisations-of-a-nocturnal-dasyurid-the-eastern-quoll-dasyurus-viverrinus
#20
Annalie Dorph, Paul G McDonald
Defining an acoustic repertoire is essential to understanding vocal signalling and communicative interactions within a species. Currently, quantitative and statistical definition is lacking for the vocalisations of many dasyurids, an important group of small to medium-sized marsupials from Australasia that includes the eastern quoll (Dasyurus viverrinus), a species of conservation concern. Beyond generating a better understanding of this species' social interactions, determining an acoustic repertoire will further improve detection rates and inference of vocalisations gathered by automated bioacoustic recorders...
2017: PloS One
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