scholarly journals Anthropogenic noise, song, and territorial aggression in southern house wrens

2021 ◽  
Author(s):  
Pedro Diniz ◽  
Charles Duca
Keyword(s):  
Anthropogenic Noise ◽  
Territorial Aggression ◽  
House Wrens

Social factors, not anthropogenic noise or artificial light, influence onset of dawn singing in a common songbird

The Auk ◽  
2019 ◽  
Vol 136 (3) ◽  
Author(s):  
Carley J Stuart ◽  
Erin E Grabarczyk ◽  
Maarten J Vonhof ◽  
Sharon A Gill
Keyword(s):  
Social Factors ◽  
Abiotic Factors ◽  
Noise Pollution ◽  
Anthropogenic Noise ◽  
Artificial Light ◽  
Negative Effects ◽  
House Wrens ◽  
Daily Behavior ◽  
Dawn Song ◽  
Male House

Abstract With worldwide increases in artificial light and anthropogenic noise, understanding how these pollutants influence animals allows us to better mitigate potential negative effects. Both light and noise affect the timing of daily activities, including the onset of dawn song in birds, yet the influence of these pollutants compared with social factors that also influence song onset remains unknown. We investigated the onset of dawn song, testing hypotheses aimed at understanding the influences of light and noise pollution as well as male competition, pairing status, and breeding stage on timing of dawn singing by male House Wrens (Troglodytes aedon). Overall, models with social factors fit song onset data better than models with abiotic factors of noise and sky glow, and the highest ranking model included nesting stage, number of male neighbors, and temperature. Males began singing earlier when they were building nests and when mates were fertile than during later nesting stages. Males also sang earlier as the number of male neighbors increased. The timing of dawn song by male House Wrens appeared unaffected by day-to-day variation in light and noise pollution, with social factors having larger effects on the onset of daily behavior in this species.

scholarly journals House Wrens Troglodytes aedon reduce repertoire size and change song element frequencies in response to anthropogenic noise

Ibis ◽  
2020 ◽  
Vol 163 (1) ◽  
pp. 52-64
Author(s):  
Roselvy Juárez ◽  
Yimen G. Araya‐Ajoy ◽  
Gilbert Barrantes ◽  
Luis Sandoval
Keyword(s):  
Anthropogenic Noise ◽  
Troglodytes Aedon ◽  
Repertoire Size ◽  
House Wrens

scholarly journals When to change your tune? Unpaired and paired male house wrens respond differently to anthropogenic noise

2018 ◽  
Vol 2 (2) ◽  
pp. 1-1 ◽  
Author(s):  
Erin E. Grabarczyk ◽  
Monique A. Pipkin ◽  
Maarten J. Vonhof ◽  
Sharon A. Gill
Keyword(s):  
Bird Species ◽  
Low Frequency ◽  
Peak Frequency ◽  
Anthropogenic Noise ◽  
Long Distance ◽  
Noise Masking ◽  
House Wrens ◽  
Song Transmission ◽  
Song Frequency ◽  
Male House

In response to anthropogenic noise, many bird species adjust their song frequency, presumably to optimize song transmission and overcome noise masking. But the costs of song adjustments may outweigh the benefits during different stages of breeding, depending on the locations of potential receivers. Selection might favor unpaired males to alter their songs because they sing to attract females that may be widely dispersed, whereas paired males might not if mates and neighbors are primary receivers of their song. We hypothesized male house wrens (Troglodytes aedon) respond differently to noise depending on their pairing status. To test our hypothesis we synthesized pink noise, which mimics anthropogenic noise, and played it at three intensities in territories of paired and unpaired focal males. We recorded their songs and analyzed whether song structure varied with pairing status and noise treatment. To validate our study design, we tested whether noise playback affected measurement of spectral song traits and changed noise levels within territories of focal males. Consistent with our predictions, unpaired males sang differently than paired males, giving longer songs at higher rates. Contrary to predictions, paired males changed their songs by increasing peak frequency during high intensity noise playback, whereas unpaired males did not. If adjusting song frequency in noise is beneficial for long-distance communication we would have expected unpaired males to change their songs in response to noise. By adjusting song frequency, paired males reduce masking and produce a song that is easier to hear. However, if females prefer low frequency song, then unpaired males may be constrained by female preference. Alternatively, if noise adjustments are learned and vary with experience or quality, unpaired males in our study population may be younger, less experienced, or lower quality males.

VMHvl-Projecting  Vglut1+ Neurons in the Posterior Amygdala Gate Territorial Aggression

2020 ◽  
Author(s):  
Xi Zha ◽  
Lei Wang ◽  
Zhuo-Lei Jiao ◽  
Rong-Rong Yang ◽  
Chun Xu ◽  
...  
Keyword(s):  
Territorial Aggression

scholarly journals Toward a broader characterization of anthropogenic noise and its effects on wildlife

2014 ◽  
Vol 26 (2) ◽  
pp. 328-333 ◽  
Author(s):  
S. A. Gill ◽  
J. R. Job ◽  
K. Myers ◽  
K. Naghshineh ◽  
M. J. Vonhof
Keyword(s):  
Anthropogenic Noise

India and Vietnam in the Indo-Pacific

2021 ◽  
pp. 097492842110049
Author(s):  
Sanjay Pulipaka ◽  
Libni Garg
Keyword(s):  
United States ◽  
Balance Of Power ◽  
The United States ◽  
International Order ◽  
Territorial Aggression ◽  
Nation States ◽  
Power Shift ◽  
Security Challenges ◽  
Common Position ◽  
Foreign Policy Strategies

The international order today is characterised by power shift and increasing multipolarity. Countries such as India and Vietnam are working to consolidate the evolving multipolarity in the Indo-Pacific. The article maps the convergences in the Indian and Vietnamese foreign policy strategies and in their approaches to the Indo-Pacific. Both countries confront similar security challenges, such as creeping territorial aggression. Further, India and Vietnam are collaborating with the United States and Japan to maintain a favourable balance of power in the Indo-Pacific. While Delhi and Hanoi agree on the need to reform the United Nations, there is still some distance to travel to find a common position on regional economic architectures. The India–Vietnam partnership demonstrates that nation-states will seek to define the structure of the international order and in this instance by increasing the intensity of multipolarity.

scholarly journals Boat Noise and Black Drum Vocalizations in Mar Chiquita Coastal Lagoon (Argentina)

2021 ◽  
Vol 9 (1) ◽  
pp. 44
Author(s):  
Maria Ceraulo ◽  
María Paz Sal Moyano ◽  
Fernando Jose Hidalgo ◽  
María Cielo Bazterrica ◽  
Salvatore Mazzola ◽  
...  
Keyword(s):  
Fish Species ◽  
Coastal Lagoon ◽  
Acoustic Method ◽  
Potential Effect ◽  
Reproductive Period ◽  
Anthropogenic Noise ◽  
Marine Biota ◽  
Call Rate ◽  
Noise Frequency ◽  
Passive Acoustic

Human-generated underwater noise and its effect on marine biota is recognized as an important issue. Boat noise can affect the communication success of fish species that use sounds for spawning purposes. During the reproductive period, males of the black drum Pogonias spp. produce calls ranging from 90 Hz to 300 Hz. In the Mar Chiquita coastal lagoon (Buenos Aires, Argentina), Pogonias courbina is one of the primary fishing species. Although no regulation is directly applied to protect it, a ban protects the reproductive period of other fish species during weekdays. Here, we investigated the potential effect of boat noise on P. courbina vocalizations through a passive acoustic method. Acoustic data were collected, and P. courbina calls were identified and counted. The files with boat noise passages were categorized into classes according to their noise frequency range (A = below 700 Hz, B = over 700 Hz, and C = below and above 700 Hz). The fish call rate was lower in files where boat noise overlapped the fish call frequency (Classes A and C). Only boat noise from Class C was significantly reduced during days with the active fishing ban. These results suggest that anthropogenic noise may affect the P. courbina call rate and underline the importance of including the evaluation of anthropogenic noise in the current management of the area.

The effect of aggression II: Acclimation to a high ambient temperature reduces territorial aggression in male striped hamsters (Cricetulus barabensis)

2021 ◽  
Vol 132 ◽  
pp. 104993
Author(s):  
Meng-Huan Bao ◽  
Xiao-Ming Xu ◽  
Da-Liang Huo ◽  
Jing Cao ◽  
Zhi-Jun Zhao
Keyword(s):  
Ambient Temperature ◽  
High Ambient Temperature ◽  
Territorial Aggression

The First Very Broadband Mediterranean Network: 30 Yr of Data and Seismological Research

2019 ◽  
Vol 91 (2A) ◽  
pp. 787-802
Author(s):  
Silvia Pondrelli ◽  
Francesca Di Luccio ◽  
Laura Scognamiglio ◽  
Irene Molinari ◽  
Simone Salimbeni ◽  
...  
Keyword(s):  
Seismic Source ◽  
Global Scale ◽  
Anthropogenic Noise ◽  
Earth Structure ◽  
Backbone Network ◽  
Early Adoption ◽  
Stable Conditions ◽  
Remote Sites ◽  
The Mediterranean

Abstract Starting in 1988, with the installation of the first broadband (BB) instrument in Italy, the Mediterranean Very Broadband Seismographic Network (MedNet) program established a backbone network of BB stations of the highest quality in the Mediterranean Sea countries. The Mediterranean region is characterized by relevant and frequent seismicity related to its complex tectonics, due to the convergence of two major plates, Africa and Eurasia, and the involvement of other minor plates, as the Adriatic plate. Therefore, the MedNet project became a scientific research infrastructure of excellence, able to fill the gap of regional coverage when the availability of seismic BB instruments was still scarce. The main characteristics of the MedNet network are the highest quality of the seismographic instrumentation at remote sites and very low level of anthropogenic noise with stable conditions of pressure and temperature. After 30 yr of recordings, the MedNet program has proven that the early adoption of very BB instruments in selected sites have been the best choice. A large number of studies benefited from MedNet data, as seismic source computation and Earth structure reconstruction, at local and global scale. We present a concise overview of the contribution given by MedNet data in the last three decades to motivate and financially support the existence of this valuable infrastructure, and to further maintain this project.

scholarly journals Artificial night light and anthropogenic noise interact to influence bird abundance over a continental scale

2021 ◽  
Author(s):  
Ashley A. Wilson ◽  
Mark A. Ditmer ◽  
Jesse R. Barber ◽  
Neil H. Carter ◽  
Eliot T. Miller ◽  
...  
Keyword(s):  
Anthropogenic Noise ◽  
Bird Abundance ◽  
Continental Scale
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