Results 21 to 30 of about 2,221 (192)

Predicting ecology and hearing sensitivities in Parapontoporia-An extinct long-snouted dolphin. [PDF]

Anat Rec (Hoboken)
Abstract Analyses of the cetacean (whale and dolphin) inner ear provide glimpses into the ecology and evolution of extinct and extant groups. The paleoecology of the long‐snouted odontocete (toothed whale) group, Parapontoporia, is primarily marine with its depositional context also suggesting freshwater tolerance.
Sanks J, Racicot R.
europepmc   +2 more sources

Bat biosonar signals [PDF]

The Journal of the Acoustical Society of America, 2021
The Reflections series takes a look back on historical articles from The Journal of the Acoustical Society of America that have had a significant impact on the science and practice of acoustics.
James A. Simmons, Gregory J. Auger
openaire   +2 more sources

Vocalization Characteristics of the Indo-Pacific Humpback Dolphins (<i>Sousa chinensis</i>) in Xiamen Bay With Insights on Regional Differences. [PDF]

Ecol Evol
The Indo‐Pacific humpback dolphin population in Xiamen Bay was divided into two geographically separated but socially associated communities inhabiting the West and East sub‐regions. Based on 3 years of boat‐based surveys, this study established baseline acoustic characteristics and investigated whether vocal patterns varied with habitat conditions ...
Peng X, Hua Z, Wu F, Zhang F, Fu W, Li Y, Zhang C, Ou W, Xiang W, Zhou B, Song Z, Zhang Y.   +11 more
europepmc   +2 more sources

Effects of Recreational Boats on Harbour Porpoise Swimming Speed and Surfacing Interval Investigated by Two Synchronised UAVs. [PDF]

Ecol Evol
This study examines the impact of speed and proximity of recreational boats on the swimming speed and surfacing interval of one of the most common coastal cetacean species, the harbour porpoise (Phocoena phocoena), using data collected by unmanned aerial vehicles (UAVs) in a key habitat for the vulnerable Belt Sea population.
Till J, Palmqvist V, Wilk EN, Carlsson P, Stedt J.   +4 more
europepmc   +2 more sources

Biosonar activity of the Indo-Pacific humpback dolphin (Sousa chinensis) near the tunnel section of the world’s longest cross-sea bridge—the Hong Kong-Zhuhai-Macao Bridge—is negatively correlated with underwater noise

Frontiers in Marine Science, 2023
Underwater noise pollution from the world’s longest cross-sea bridge—the Hong Kong-Zhuhai-Macao Bridge (HZMB)—which stretches across the Chinese White Dolphin National Nature Reserve (of the People’s Republic of China, PRC) in the Pearl River Estuary may
Xue An, Xue An, Pengxiang Duan, Pengxiang Duan, Weilun Li, Weilun Li, Jing Yuan, Jing Yuan, Yuwei Chen, Fei Fan, Xiaojun Deng, Xiaojun Deng, Yousheng Xiao, Xi Chen, Ding Wang, Zhitao Wang, Kexiong Wang, Kexiong Wang   +17 more
doaj   +1 more source

Hearing sensation levels of emitted biosonar clicks in an echolocating Atlantic bottlenose dolphin. [PDF]

PLoS ONE, 2012
Emitted biosonar clicks and auditory evoked potential (AEP) responses triggered by the clicks were synchronously recorded during echolocation in an Atlantic bottlenose dolphin (Tursiops truncatus) trained to wear suction-cup EEG electrodes and to detect ...
Songhai Li, Paul E Nachtigall, Marlee Breese, Alexander Ya Supin   +3 more
doaj   +1 more source

Noseleaf dynamics during pulse emission in horseshoe bats. [PDF]

PLoS ONE, 2012
Horseshoe bats emit their biosonar pulses nasally and diffract the outgoing ultrasonic waves by conspicuous structures that surrounded the nostrils. Here, we report quantitative experimental data on the motion of a prominent component of these structures,
Lin Feng, Li Gao, Hongwang Lu, Rolf Müller   +3 more
doaj   +1 more source

Rapid jamming avoidance in biosonar [PDF]

Proceedings of the Royal Society B: Biological Sciences, 2006
The sonar systems of bats and dolphins are in many ways superior to man-made sonar and radar systems, and considerable effort has been devoted to understanding the signal-processing strategies underlying these capabilities. A major feature determining the efficiency of sonar systems is the sensitivity to noise and jamming signals.
Erin H, Gillam, Nachum, Ulanovsky, Gary F, McCracken   +2 more
openaire   +2 more sources

Oilbirds produce echolocation signals beyond their best hearing range and adjust signal design to natural light conditions [PDF]

Royal Society Open Science, 2017
Oilbirds are active at night, foraging for fruits using keen olfaction and extremely light-sensitive eyes, and echolocate as they leave and return to their cavernous roosts. We recorded the echolocation behaviour of wild oilbirds using a multi-microphone
Signe Brinkløv, Coen P. H. Elemans, John M. Ratcliffe   +2 more
doaj   +1 more source

Functional Analyses of Peripheral Auditory System Adaptations for Echolocation in Air vs. Water

Frontiers in Ecology and Evolution, 2021
The similarity of acoustic tasks performed by odontocete (toothed whale) and microchiropteran (insectivorous bat) biosonar suggests they may have common ultrasonic signal reception and processing mechanisms.
Darlene R. Ketten, Darlene R. Ketten, James A. Simmons, James A. Simmons, Hiroshi Riquimaroux, Hiroshi Riquimaroux, Andrea Megela Simmons, Andrea Megela Simmons   +7 more
doaj   +1 more source