Effects of acoustic environment on male calling activity and timing in Neotropical forest katydids

2016 ◽  
Vol 70 (9) ◽  
pp. 1485-1495 ◽  
Author(s):  
Laurel B. Symes ◽  
Rachel A. Page ◽  
Hannah M. ter Hofstede
Keyword(s):  
Acoustic Environment ◽  
Neotropical Forest ◽  
Calling Activity ◽  
Male Calling

Diurnal? Calling activity patterns reveal nocturnal habits in the aposematic toad Melanophryniscus rubriventris

2016 ◽  
Vol 94 (7) ◽  
pp. 497-503 ◽  
Author(s):  
L.C. Pereyra ◽  
M.S. Akmentins ◽  
E.A. Sanabria ◽  
M. Vaira
Keyword(s):  
Abiotic Factors ◽  
Activity Patterns ◽  
Diel Activity ◽  
High Plasticity ◽  
Air Humidity ◽  
Diel Pattern ◽  
Relative Air Humidity ◽  
Calling Activity ◽  
Mating Opportunities ◽  
Male Calling

In diurnal species with short breeding seasons, an extension of diel activity to the night hours could be favoured to maximize mating opportunities, but individuals must deal with physiological and behavioural constraints. We tested this hypothesis in the Yungas Red-belly Toad (Melanophryniscus rubriventris (Vellard, 1947)). We registered the diel pattern of male calling activity in two localities using automated recording systems, and related it to abiotic factors such as temperature, relative air humidity, and precipitation. The diel pattern of vocalization was mainly diurnal. Interestingly though, nocturnal calling activity was a common feature, representing between 40% and 43% of call records in both localities. Vocal activity was significantly influenced by time of the day and presence of rainfall. Calling males showed high plasticity, with activity in the entire environmental range of relative air humidity and temperature. Nocturnal calling seems to play an important role in the mating strategy of males, and it is probably more frequent in the genus Melanophryniscus than currently assumed. We discuss the implications of our findings in relation to different aspects of ecology of the species and suggest that bright colouration in M. rubriventris might result from a compromise between several nonconflicting functions (e.g., aposematism and thermoregulation).

Acoustic Communication in Woodhouse's Toad (Bufo Woodhousei)

Behaviour ◽  
1986 ◽  
Vol 98 (1-4) ◽  
pp. 305-319 ◽  
Author(s):  
Marjorie R. Leek ◽  
Brian K. Sullivan
Keyword(s):  
High Frequency ◽  
Species Recognition ◽  
Calling Behavior ◽  
Apparent Effect ◽  
Acoustic Stimuli ◽  
Calling Activity ◽  
Male Calling ◽  
Bufo Woodhousei ◽  
Filtered Noise ◽  
Toad Bufo

AbstractWe investigated changes in calling behavior of individual male Bufo woodhousei in response to playback of natural and synthetic acoustic stimuli. Males lowered their call rates and avoided acoustic overlap with all stimuli centered at 1.4 kHz; only a high frequency (3.8 kHz) stimulus was ineffective. Even filtered noise centered at 1.4 kHz was an effective inhibitor of calling activity. Variation in rate of amplitude modulation of acoustic stimuli had no apparent effect on male calling behavior. These results are discussed in relation to species recognition in bufonids, and acoustic competition between male anurans in general.

Sex differences in response to environmental and social breeding cues in an amphibian

Behaviour ◽  
2021 ◽  
pp. 1-30
Author(s):  
Daniel M. O’Brien ◽  
Aimee J. Silla ◽  
Patrick S. Forsythe ◽  
Phillip G. Byrne
Keyword(s):  
Breeding Site ◽  
Reproductive Behaviour ◽  
Lunar Phase ◽  
Strongly Correlated ◽  
Social Variable ◽  
Calling Activity ◽  
Specific Variation ◽  
Male Calling ◽  
Males And Females ◽  
New Evidence

Abstract The relative influence of climatic and social factors on sex-specific variation in reproductive behaviour remains poorly understood. Here, we examine the influence of multiple climatic cues in combination with a social cue on the reproductive behaviours of males and females in a terrestrial breeding toadlet (Pseudophryne coriacea). Over a 115-day breeding season, arrival patterns of each sex, and male calling activity, were recorded daily, while climatic variables were logged continuously. Multivariate analysis showed that arrival of males at the breeding site, as well as male nightly calling activity, were most strongly influenced by a climatic variable (rainfall). By contrast, female arrival was strongly correlated with a social variable (male calling activity), with abiotic conditions having no influence, other than a moderate influence of lunar phase (lunar illumination). These results suggest that cues used for breeding are sex specific and provide new evidence that combinations of climatic and social cues can be integrated into breeding decisions.

scholarly journals Male calling activity in syntopic populations ofRana latasteiandRana dalmatina(Amphibia: Anura)

2014 ◽  
Vol 82 (1) ◽  
pp. 124-132 ◽  
Author(s):  
R. Sacchi ◽  
R. Cigognini ◽  
A. Gazzola ◽  
F. Bernini ◽  
E. Razzetti
Keyword(s):  
Calling Activity ◽  
Male Calling

The many faces of STEM in materials science

1991 ◽  
Vol 49 ◽  
pp. 440-441
Author(s):  
John Silcox
Keyword(s):  
Materials Science ◽  
Auger Spectroscopy ◽  
Dark Field ◽  
High Tc Superconductors ◽  
High Tc ◽  
Acoustic Environment ◽  
Electromagnetic Vibration ◽  
The Many ◽  
Serial Mode

Determination of the microstructure and microchemistry of small features often provides the insight needed for the understanding of processes in real materials. In many cases, it is not adequate to use microscopy alone. Microdiffraction and microspectroscopic information such as EELS, X-ray microprobe analysis and Auger spectroscopy can all contribute vital parts of the picture. For a number of reasons, dedicated STEM offers considerable promise as a quantitative instrument. In this paper, we review progress towards effective quantitative use of STEM with illustrations drawn from studies of high Tc superconductors, compound semiconductors and metallization of H-terminated silicon.Intrinsically, STEM is a quantitative instrument. Images are acquired directly by detectors in serial mode which is particularly convenient for digital image acquisition, control and display. The VG HB501A at Cornell has been installed in a particularly stable electromagnetic, vibration and acoustic environment. Care has been paid to achieving UHV conditions (i.e., 10-10 Torr). Finally, it has been interfaced with a VAX 3200 work station by Kirkland. This permits, for example, the acquisition of bright field (or energy loss) images and dark field images simultaneously as quantitative arrays in perfect registration.

Hearing Aid Amplification Reduces Communication Effort of People With Hearing Impairment and Their Conversation Partners

2020 ◽  
Vol 63 (4) ◽  
pp. 1299-1311 ◽  
Author(s):  
Timothy Beechey ◽  
Jörg M. Buchholz ◽  
Gitte Keidser
Keyword(s):  
Hearing Impairment ◽  
Hearing Aid ◽  
Normal Hearing ◽  
Referential Communication ◽  
Hearing Impaired ◽  
Directional Hearing ◽  
Acoustic Environment ◽  
Communication Task ◽  
Acoustic Environments ◽  
The Impact

Objectives This study investigates the hypothesis that hearing aid amplification reduces effort within conversation for both hearing aid wearers and their communication partners. Levels of effort, in the form of speech production modifications, required to maintain successful spoken communication in a range of acoustic environments are compared to earlier reported results measured in unaided conversation conditions. Design Fifteen young adult normal-hearing participants and 15 older adult hearing-impaired participants were tested in pairs. Each pair consisted of one young normal-hearing participant and one older hearing-impaired participant. Hearing-impaired participants received directional hearing aid amplification, according to their audiogram, via a master hearing aid with gain provided according to the NAL-NL2 fitting formula. Pairs of participants were required to take part in naturalistic conversations through the use of a referential communication task. Each pair took part in five conversations, each of 5-min duration. During each conversation, participants were exposed to one of five different realistic acoustic environments presented through highly open headphones. The ordering of acoustic environments across experimental blocks was pseudorandomized. Resulting recordings of conversational speech were analyzed to determine the magnitude of speech modifications, in terms of vocal level and spectrum, produced by normal-hearing talkers as a function of both acoustic environment and the degree of high-frequency average hearing impairment of their conversation partner. Results The magnitude of spectral modifications of speech produced by normal-hearing talkers during conversations with aided hearing-impaired interlocutors was smaller than the speech modifications observed during conversations between the same pairs of participants in the absence of hearing aid amplification. Conclusions The provision of hearing aid amplification reduces the effort required to maintain communication in adverse conditions. This reduction in effort provides benefit to hearing-impaired individuals and also to the conversation partners of hearing-impaired individuals. By considering the impact of amplification on both sides of dyadic conversations, this approach contributes to an increased understanding of the likely impact of hearing impairment on everyday communication.

Acoustic environment at a neonatal intensive care unit

2019 ◽  
Author(s):  
M Gaspar ◽  
S Yohasenan ◽  
F Haslbeck ◽  
D Bassler ◽  
V Kurtcuoglu ◽  
...  
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Neonatal Intensive Care Unit ◽  
Neonatal Intensive Care ◽  
Acoustic Environment

Being a Christian in the Catholic Way

2005 ◽  
Vol 1 (2-3) ◽  
pp. 352-374 ◽  
Author(s):  
Esther Peperkamp
Keyword(s):  
Embodied Experience ◽  
Electronic Technology ◽  
Acoustic Environment ◽  
Common Practices ◽  
Point Of Departure ◽  
The Universe

This article addresses the distinctive spiritual qualities of aerial movement. Taking as a point of departure the feature lm Maria, Mãe do Filho de Deus (2003) played by famous Brazilian Padre Marcelo Rossi, it argues for an engagement with cinematic images in terms of aerial dynamic imagination. It will be shown that the “inspired breath” of Padre Marcelo organizes the universe and affects the constitution of subjects and space in the lm according to the Scriptures. The same aerial dynamic applies to his other contexts of performance such as Byzantine praying techniques and their relation to space. Subsequently, the article explores underlying analogies between electronic technology, acoustic environment, and pneumatic spirituality within common practices of embodied experience.

Acoustic environment of admiralty inlet: Broadband noise measurements

2011 ◽  
Author(s):  
Jinshan Xu ◽  
Z Daniel Deng ◽  
Jayson J Martinez ◽  
Thomas J Carlson ◽  
Joshua R Myers ◽  
...  
Keyword(s):  
Broadband Noise ◽  
Acoustic Environment ◽  
Noise Measurements ◽  
Admiralty Inlet
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