Consulta: subjectFacets:"Bioacoustics"
Registros recuperados: 24
Data/hora: 03/06/2024 07:23:08

Impacts of Traffic Noise and Traffic Volume on Birds of Roadside Habitats
Provedor de dados: Ecology and Society
Autores: Parris, Kirsten M.; School of Botany, University of Melbourne, Australia; Australian Research Centre for Urban Ecology, Royal Botanic Gardens Melbourne, Australia; k.parris@unimelb.edu.au; Schneider, Angela; Department of Zoology, University of Melbourne, Australia; angelas@unimelb.edu.au.
Roadside habitats are important for a range of taxa including plants, insects, mammals, and birds, particularly in developed countries in which large expanses of native vegetation have been cleared for agriculture or urban development. Although roadside vegetation may provide suitable habitat for many species, resident animals can be exposed to high levels of traffic noise, visual disturbance from passing vehicles, and the risk of collision with cars and trucks. Traffic noise can reduce the distance over which acoustic signals such as song can be detected, an effect known as acoustic interference or masking. Studies from the northern hemisphere show that the singing behavior of birds changes in the presence of traffic noise. We investigated the impact of...
Tipo: Peer-Reviewed Reports
Palavras-chave: Acoustic interference; Ambient noise; Bioacoustics; Conservation biology; Road ecology; Signal design; Traffic noise; Vocal communication.
Ano: 2009

Frogs Call at a Higher Pitch in Traffic Noise
Provedor de dados: Ecology and Society
Autores: Parris, Kirsten M; University of Melbourne; Australian Research Centre for Urban Ecology, Royal Botanic Gardens Melbourne; k.parris@unimelb.edu.au; Velik-Lord, Meah; University of Melbourne; meah@unimelb.edu.au; North, Joanne M. A.; University of Melbourne; fflojjo@yahoo.com.
Male frogs call to attract females for mating and to defend territories from rival males. Female frogs of some species prefer lower-pitched calls, which indicate larger, more experienced males. Acoustic interference occurs when background noise reduces the active distance or the distance over which an acoustic signal can be detected. Birds are known to call at a higher pitch or frequency in urban noise, decreasing acoustic interference from low-frequency noise. Using Bayesian linear regression, we investigated the effect of traffic noise on the pitch of advertisement calls in two species of frogs, the southern brown tree frog (Litoria ewingii) and the common eastern froglet (Crinia signifera). We found evidence that L. ewingii calls at a higher pitch in...
Tipo: Peer-Reviewed Reports
Palavras-chave: Acoustic interference; Ambient noise; Amphibian decline; Animal behavior; Bioacoustics; Road ecology; Signal design; Traffic noise; Urban ecology; Vocal communication; Litoria ewingii; Crinia signifera.
Ano: 2009

Vocalization of broilers can be used to identify their sex and genetic strain
Provedor de dados: Engenharia Agrícola
Autores: PEREIRA,ERICA M.; NÄÄS,IRENILZA DE A.; GARCIA,RODRIGO G.
In order to reach higher broiler performance, farmers target losses reduction. One way to make this possible is by rearing sexed broilers as male and female present diverse performance due to their physiological differences. Birds from different genetic strain also have a distinct performance at the same age. Considering that sexed flocks may present higher performance this study aimed to identify one-day-old chicks’ sex throughout their vocalization. This research also investigated the possibility of identifying the genetic strain by their vocalization attributes. A total of 120 chicks, half of them were from Cobb® genetic strain and the other half from Ross® genetic strain. From each group, a total of 30 were males and 30 females, which were previously...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Signal analysis; Sex identification; Bioacoustics.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162015000200192

Comparison of calling songs in three allopatric populations of Endecous itatibensis (Orthoptera, Phalangopsinae)
Provedor de dados: Iheringia Série Zoologia
Autores: Zefa,Edison.
Three isolated populations of the cricket Endecous itatibensis Rehn, 1918 had been analyzed to test the hypothesis of divergence in the calling song estridulation and to discuss its implications in the speciation process. The song registers were obtained from specimens in Corumbataí, Piraciacaba and Itatiba cities, state of São Paulo, Brazil. In the three analyzed populations, calling songs are composed by pairs of notes. Specimens from Corumbataí emit composed phrases with 3 to 18 pairs of notes, while those of Piracicaba and Itatiba have 1 to 3 pairs of notes. Inter- and intrapopulational variability in the frequencies of acoustic signals were detected. While recording the calling songs, other stridulations were registered, possibly from species of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cricket; Bioacoustics; Acoustic competition; Stridulation; Speciation.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0073-47212006000100002

Mesoscale Eddies Structure Mesopelagic Communities
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Della Penna, Alice; Gaube, Peter.
Mesoscale eddies play a key role in structuring open ocean ecosystems, affecting the entire trophic web from primary producers to large pelagic predators including sharks and elephant seals. Recent advances in the tracking of pelagic predators have revealed that these animals forage in the mesopelagic and the depth and duration of their foraging dives are affected by the presence of eddies. The ways in which eddies impact the distribution of mesopelagic micronekton, however, remain largely unknown. During a multi-seasonal experiment we used a shipboard scientific echosounder transmitting at 38 kHz to observe the distribution of acoustic backscattering in the energetic mesoscale eddy field of the northwestern Atlantic. Observations were collected at 24...
Tipo: Text
Palavras-chave: NAAMES; North Atlantic Aerosols and Ecosystems Study; Micronekton; Mesoscale; Eddies; Echosounder; Bioacoustics; Intermediate trophic levels.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00642/75390/76187.pdf

Long-Term and Seasonal Changes of Large Whale Call Frequency in the Southern Indian Ocean
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Leroy, Emmanuelle C; Royer, Jean-yves; Bonnel, Julien; Samaran, Flore.
In the past decades, in the context of a changing ocean submitted to an increasing human activity, a progressive decrease in the frequencies (pitch) of blue whale vocalizations has been observed worldwide. Its causes, of natural or anthropogenic nature, are still unclear. Based on 7years of continuous acoustic recordings at widespread sites in the southern Indian Ocean, we show that this observation stands for five populations of large whales. The frequency of selected units of vocalizations of fin, Antarctic, and pygmy blue whales has steadily decreased at a rate of a few tenths of hertz per year since 2002. In addition to this interannual frequency decrease, blue whale vocalizations display seasonal frequency shifts. We show that these intra-annual...
Tipo: Text
Palavras-chave: Large baleen whales; Blue whale calls; Frequency shifts; Frequency decrease; Ambient noise; Bioacoustics.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00516/62730/67109.pdf

Allis shad (Alosa alosa) exhibit an intensity-graded behavioral response when exposed to ultrasound
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Wilson, M; Acolas, M; Begout, Marie-laure; Madsen, P; Wahlberg, M.
Most fish cannot hear frequencies above 3 kHz, but a few species belonging to the subfamily Alosinae (family Clupeidae) can detect intense ultrasound. The response of adult specimens of the European allis shad (Alosa alosa) to sinusoidal ultrasonic pulses at 70 and 120 kHz is tested. The fish showed an intensity-graded response to the ultrasonic pulses with a response threshold between 161 and 167 dB re 1 mu Pa (pp) for both frequencies. These response thresholds are similar to thresholds derived from juvenile American shad (Alosa sapidissima) in previous studies, supporting the suggestion that these members of Alosinae have evolved a dedicated ultrasound detector adapted to detect and respond to approaching echolocating toothed whales. (C) 2008 Acoustical...
Tipo: Text
Palavras-chave: Zoology; Ultrasonics; Biocommunications; Bioacoustics.
Ano: 2008
URL: http://archimer.ifremer.fr/doc/2008/publication-6118.pdf

Calling patterns of Western purple-faced langurs (Mammalia: Primates: Cercopithecidea: Trachypithecus vetulus nestor) in a degraded human landscape in Sri Lanka
Provedor de dados: Naturalis Digital Academic Repository
Autores: Eschmann, C.; Moore, R.; Nekaris, K.A.I.
The study of calling patterns is a useful non-invasive method for determining population densities and the taxonomic relationships of rare or cryptic animal species. The Western purple-faced langur Trachypithecus vetulus nestor, endemic to Sri Lanka’s lowland rainforests, is severely impacted by forest fragmentation, with most remaining populations living almost completely in home gardens. Due to their shy nature, little is known about the behaviour of this subspecies; analysing the regular loud calls emitted by these langurs could allow for improvement of census techniques, clarification of their taxonomy, and an understanding of the impact of forest destruction on their behaviour. In 2007, we recorded the calling patterns of five male T. v. nestor at...
Tipo: Article / Letter to the editor
Palavras-chave: Bioacoustics; Taxonomy; Colobinae; South Asia; Fragmentation; 42.84.
Ano: 2008
URL: http://www.repository.naturalis.nl/record/280454

Systematic notes on Asian birds. 49. A preliminary review of the Aegithalidae, Remizidae and Paridae
Provedor de dados: Naturalis Digital Academic Repository
Autores: Eck, S.; Martens, J.
Proposed recent taxonomic changes in Paridae, Aegithalidae, and Remizidae are reviewed within the geographic scope of this series and their reliability is discussed in terms of the Biological Species Concept with respect to secondary contacts, hybridization, introgression, bioacoustics, and molecular genetics. Certain previously unpublished data are added to support the taxonomic decisions.
Tipo: Article / Letter to the editor
Palavras-chave: Paridae; Aegithalidae; Remizidae; Species limits; Systematics; Taxonomy; Eastern Palaearctic region; Indo-Malayan region; Morphology; Bioacoustics; Molecular genetics; Secondary contacts; Hybridisation; Introgression; 42.83.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/209958

A review of Chorthippus species with angled pronotal lateral keels from Greece with special reference to transitional populations between some Peloponnesean taxa (Orthoptera, Acrididae)
Provedor de dados: Naturalis Digital Academic Repository
Autores: Willemse, F.; Helversen, O. von; Odé, B.
This paper presents a summary of the current knowledge on the systematics of the Greek taxa of Chorthippus, morphologically characterised by angled lateral pronotal keels (usually grouped as Glyptobothrus). Prior to this paper, based on traditional morphology, ten taxa of Chorthippus with angled lateral pronotal keels were recognized from Greece. Based on morphology as well as (and more importantly so) bioacoustics thirteen Greek taxa are now recognised. With addition of a few additional related taxa that occur only outside Greece, all are treated in this paper: Chorthippus apricarius apricarius (Linnaeus, 1758), C. vagans vagans (Eversmann, 1848) (not in Greece), C. v. cypriotus (Uvarov, 1936) stat. nov. [Cyprus], C. v. africanus Nadig, 1981 [N. Africa],...
Tipo: Article / Letter to the editor
Palavras-chave: Chorthippus; Glyptobothrus; Greece; Acrididae; Orthoptera; Morphology; Bioacoustics; Taxonomy; Variability; Transitional or hybrid populations; Phylogeny; Evolution; Palaeobiogeography; Key; Distribution; Ecology; 42.75.
Ano: 2009
URL: http://www.repository.naturalis.nl/record/314191

Systematic notes on Asian birds. 65. A preliminary review of the Certhiidae
Provedor de dados: Naturalis Digital Academic Repository
Autores: Martens, J.; Tietze, D.T.
Recent proposed taxonomic changes in the Certhiidae are reviewed within the geographic scope of this series and their reliability is discussed in terms of the Biological Species Concept, with respect to secondary contacts, bioacoustics, and molecular genetics. Certain hitherto unpublished data, useful for the understanding of taxonomic decisions, are included. In accordance with Article 24.2.3 of the Code one of us acts as First Reviser in selecting the correct spelling of the name of the recently described Chinese species.
Tipo: Article / Letter to the editor
Palavras-chave: Certhiidae; Species limits; Systematics; Taxonomy; First Reviser; Eastern Palaearctic region; Indomalayan region; Morphology; Bioacoustics; Molecular geneticsz; 42.83.
Ano: 2006
URL: http://www.repository.naturalis.nl/record/210083

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
Provedor de dados: Papéis Avulsos de Zoologia
Autores: CARVALHO,THIAGO RIBEIRO DE; MARTINS,LUCAS BORGES; TEIXEIRA,BERNARDO FRANCO DA VEIGA; GODINHO,LEANDRO BRAGA; GIARETTA,ARIOVALDO ANTONIO.
In this paper, we provide an updated diagnosis for Pseudopaludicola giarettai based on the morphometric and acoustic variation observed with the assessment of new populations, plus an expansion of its distribution range. Our results support that all acoustic variation observed might be attributed to intraspecific variation. The variation in body size and dorsal stripe patterns observed for Pseudopaludicola giarettai reinforces that the distinctive whistling advertisement call pattern is the most reliable evidence line to diagnose it from its congeners, whereas morphological (robust body, glandular dorsum) and morphometric (body size) features vary considerably within and among populations so that they should no longer be employed as diagnostic features of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioacoustics; Minas Gerais; Taxonomy.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492015001700245

Vocal repertory of Scinax littoreus (Anura: Hylidae) with comments on the advertisement call of the Scinax perpusillus species group
Provedor de dados: Revista Brasileira de Zoologia
Autores: Pontes,Rafael; Mattedi,Camila; Baêta,Délio.
The Scinax perpusillus species group consists of thirteen bromeligenous treefrogs, of which only six have had their acoustic parameters appropriately described. In this work, we present the vocal repertory of Scinax littoreus (Peixoto, 1988) based on recordings obtained from three different populations in the state of Rio de Janeiro, Brazil. Based on our observations we suggest that the vocal repertory of S. littoreus is composed of two distinct types of calls. The call named type A, which corresponds to a long series of multipulsed notes, is likely to have a mating function. This type of call is similar to that reported for Scinax arduous Peixoto, 2002, Scinax peixotoi Brasileiro, Haddad, Sawaya &amp;amp; Martins, 2007, and Scinax perpusillus (Lutz...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aggressive call; Bioacoustics; Bromeligenous; Geographic distribution; Territorial call.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702013000400001

Does the golden lion tamarin, Leontopithecus rosalia (Primates: Callitrichidae), select a location whithin the forest strata for long distance communication?
Provedor de dados: Revista Brasileira de Zoologia
Autores: Sabatini,Vera; Ruiz-Miranda,Carlos R.
The effectiveness of auditory signals for long distance communication depends on environmental, biological and behavioral factors. Because the environment is not homogenous, it is expected that vocalizing animals would emit signals from locations (perches) that would facilitate call propagation and perception. Perching behavior has been widely documented in birds, but not in primates. The aim of this study was to ascertain whether golden lion tamarins - Leontopithecus rosalia (Linnaeus, 1766) - emit long calls from places (perch) within the forest strata that are higher above the ground with respect to places used for baseline behaviors. We compared the forest stratum (upper, middle and lower strata) and habitat type (hill, swamp and lowland forests) used...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioacoustics; Communication; Perching.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702010000200004

Advertisement call of Dendropsophus microps (Anura: Hylidae) from two populations from southeastern Brazil
Provedor de dados: Revista Brasileira de Zoologia
Autores: Forti,Lucas Rodriguez; Márquez,Rafael; Bertoluci,Jaime.
In anurans, acoustic communication is a major mechanism of pre-zygotic isolation, since it carries information about species recognition. Detailed descriptions of the acoustic properties of anuran advertisement calls provide important data to taxonomist and to the understanding of the evolution of the group. Herein we re-describe the advertisement call of the hylid frog Dendropsophus microps (Peters, 1872) after analyzing a larger sample than that of previous descriptions. We also compare the acoustic properties of the call in two populations and discuss the effect of the presence of the sister species, Dendropsophus giesleri (Mertens, 1950), a potential competitor, in one of the populations. Additionally, we provide information on calling sites and size...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acoustic traits; Amphibia; Bioacoustics; Call evolution; Competition.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000300187

Advertisement and release calls of Phyllomedusa ayeaye (Anura: Hylidae) with comments on the social context of emission
Provedor de dados: Revista Brasileira de Zoologia
Autores: Nali,Renato C.; Borges,Marília M.; Prado,Cynthia P.A.
ABSTRACT Male calls play different roles in anuran social organization, such as spacing, territoriality and female attraction. However, calls and associated behaviors remain poorly described for many anuran species. Here we describe the advertisement and release calls of the tree frog Phyllomedusa ayeaye (Lutz, 1966) and report on the social context of emissions and a physical combat. Approximately 35 minutes of digital recordings were obtained from 34 hours of observations at one breeding site in the state of Minas Gerais, southeastern Brazil. Bioacoustic analysis showed that males emitted two types of advertisement calls: 1) simple call (a sequence of short pulsed notes) and 2) composite call (a sequence of short pulsed notes followed by a long pulsed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aggressive behavior; Bioacoustics; Cerrado; Composite call; Phyllomedusinae.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702015000400263

Second capture of Promops centralis (Chiroptera) in French Guiana after 28 years of mist-netting and description of its echolocation and distress calls
Provedor de dados: Acta Amazonica
Autores: FROIDEVAUX,Jérémy S.P.; ROEMER,Charlotte; LEMARCHAND,Clément; MARTÍ-CARRERAS,Joan; MAES,Piet; RUFRAY,Vincent; URIOT,Quentin; URIOT,Sylvain; LÓPEZ-BAUCELLS,Adrià.
ABSTRACT The Amazonian basin harbours some of the most bat-diverse ecosystems worldwide. Yet, information on elusive, high-flying bat species such as Molossidae is scarce or virtually missing in the literature, which hampers conservation efforts both locally and globally. The recent advent of new technologies specifically designed to survey bats, such as passive ultrasound detectors and acoustic lures, has significantly increased understanding of bat ecology and distribution, and has allowed researchers to gather new and valuable information which was impossible to collect in the past. We undertook a rapid bat diversity assessment in French Guiana using acoustic lures to aid in capturing high-flying insectivorous bat species. Here we report the second and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazon; Bats; Bioacoustics; Molossidae; Mitochondrial sequences.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672020000400327

Application of automated bioacoustic identification in environmental education and assessment
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Oba,Teruyo.
Developments in electronics and computer science have led to the introduction of an automated bioacoustic identification device used to resolve commonly encountered problems in the identification of animal species in the field. This technology aids our auditory observations, and also improves the quality of biological surveys and environmental monitoring. In this paper the future roles and possibilities of bioacoustics are discussed, providing some examples from the realm of environmental education and monitoring that focus on the use of nature sounds.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Automated species identification; Bioacoustics; Environmental education; Monitoring environment; Sound map.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200039

Automated bioacoustic identification of species
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Chesmore,David.
Research into the automated identification of animals by bioacoustics is becoming more widespread mainly due to difficulties in carrying out manual surveys. This paper describes automated recognition of insects (Orthoptera) using time domain signal coding and artificial neural networks. Results of field recordings made in the UK in 2002 are presented which show that it is possible to accurately recognize 4 British Orthoptera species in natural conditions under high levels of interference. Work is under way to increase the number of species recognized.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Automated identification; Orthoptera; Bioacoustics; Time domain signal coding; Biodiversity informatics.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200037

Bioacoustic investigations and taxonomic considerations on the Cicadetta montana species complex (Homoptera: Cicadoidea: Tibicinidae)
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Gogala,Matija; Trilar,Tomi.
Recent bioacoustic investigations have shown that Cicadetta montana Scopoli 1772 is a complex of morphologically similar sister species that are best characterized by their song patterns. At the type locality of C. montana, only mountain cicadas with simple, long lasting song phrases were heard, recorded and collected. Therefore, we have good reasons to suggest that this type of song is characteristic for C. montana s. str. Boulard described a song of C. montana from France with phrases composed of a long and a short echeme; this type of song is characteristic for cicadas morphologically corresponding to C. montana var. brevipennis Fieber 1876; we suggest to raise this taxon to species level. On the basis of specific song, Puissant and Boulard described C....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cicadetta montana; Cicadetta spp.; Cicadas; Bioacoustics; Systematics.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200020

Naming structures and qualifying properties of anuran bioacoustical signals: a call for a homology-based nomenclature and equality for quantitative data
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: HEPP,FÁBIO; POMBAL JR,JOSÉ P.
Abstract: There is a significant interest for using call features in taxonomic and systematic studies. However, the indiscriminate use of alternative terms for the acoustic structures has precluded reliable comparisons among species without directly checking recordings of all compared species. Recent attempts of nomenclature standardization have focused on term and structure definitions instead of homology. Here, we argue that application of nomenclatural propositions based on universal similarities is pragmatically difficult (likely impossible) and, most importantly, inaccurate regarding to assessment of homology. If homology is not properly assessed, nomenclature can lead to artificial groupings, which can hamper our understanding of the natural world....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Behavior; Bioacoustics; Comparative biology; Systematics; Terminology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700612

Comparative analysis of the song of the Rufous-collared Sparrow Zonotrichia capensis (Emberizidae) between Campinas and Botucatu, São Paulo State, Brazil
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Avelino,Márcio F.; Vielliard,Jacques M.E.
The regional dialects or regiolects of the Rufous-collared Sparrow Zonotrichia capensis were compared between Campinas (47º06'W-22º90'S) and Botucatu (48º44'W-22º88'S), São Paulo State, Southeastern Brazil. Songs of 88 individuals from thirteen localities were recorded. Sonograms showed that two areas presented more homogeneous songs, forming two regiolects. In 11 localities most individuals shared the same song type. At the other two localities, they sang up to 5 different song types. This occurs at the boundaries of the regiolects, and was also where individuals singing more than one song type were found. Similarities between song types were not related to geographic distance between the respective singers. A comparative analysis showed similarities in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioacoustics; Geographic variation; Zonotrichia capensis; Birds; São Paulo State; Brazil.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200023

Species richness and relative abundance of birds in natural and anthropogenic fragments of Brazilian Atlantic forest
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: Anjos,Luiz dos.
Bird communities were studied in two types of fragmented habitat of Atlantic forest in the State of Paraná, southern Brazil; one consisted of forest fragments that were created as a result of human activities (forest remnants), the other consisted of a set of naturally occurring forest fragments (forest patches). Using quantitative data obtained by the point counts method in 3 forest patches and 3 forest remnants during one year, species richness and relative abundance were compared in those habitats, considering species groups according to their general feeding habits. Insectivores, omnivores, and frugivores presented similar general tendencies in both habitats (decrease of species number with decreasing size and increasing isolation of forest fragment)....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Birds; Bioacoustics; Brazilian Atlantic forest; Conservation; Forest fragmentation.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000200036

Cougar (Puma concolor) vocalization and frequency shift as a playback response
Provedor de dados: Biota Neotropica
Autores: Macarrão,Arthur; Corbo,Milena; Araújo,Carlos Barros de.
Recordings of cougar (Puma concolor) vocalizations are rare in the wild. We made two night recordings from the same individual. The first recording was spontaneous whereas the second was made after a playback emission (using a third party recording) allowing for comparisons. We measured the calls before and after playback stimuli using Raven software and noted that only the minimum fundamental frequency presented differences between calls. As fundamental frequency is closely related to body size, a frequency reduction may indicate territoriality engagement. Our recording seems to be the first held in the Brazilian wild. Little is known about cougar natural history and behavior, and our data suggest that acoustic communication may have an important role on...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bioacoustics; Felid; Recordings; Brazil; Acoustic communication.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032012000300015