Amer. Scientist (2015)
Abstract currently unavailable
Range-dependent flexibility in the acoustic field of view of echolocating porpoises (Phocoena phocoena)
Wisniewska, Danuta M; Ratcliffe, John M; Beedholm, Kristian; Christensen, Christian B; Johnson, Mark; Koblitz, Jens C; Wahlberg, Magnus; Madsen, Peter T
eLife (2015)
Toothed whales use sonar to detect, locate, and track prey. They adjust emitted sound intensity, auditory sensitivity and click rate to target range, and terminate prey pursuits with high-repetition-rate, low-intensity…
Studying the biosonar of bats and porpoises using multi receiver arrays
Koblitz, Jens C.
Doctoral Thesis - Eberhard Karls Universität Tübingen (2014)
Echolocation, the main sensory modality of odontocetes and microbats, has mostly been studied using single receivers. Such a recording setup is sufficient to study signal parameters like pulse interval, inter…
Hearing pathways in the Yangtze finless porpoise, Neophocaena asiaeorientalis asiaeorientalis
Mooney, T. A.; Li, S.; Ketten, D. R.; Wang, K.; Wang, D.
Journal of Experimental Biology (2013)
How an animal receives sound may influence its use of sound. While ‘jaw hearing’ is well supported for odontocetes, work examining how sound is received across the head has been…
Comparative morphology of porpoise (Cetacea: Phocoenidae) pterygoid sinuses: Phylogenetic and functional implications
Racicot, Rachel A.; Berta, Annalisa
Journal of Morphology (2012)
High-resolution X-ray computed tomographic scans were used to examine pterygoid sinus morphology within extant porpoise species and one delphinid (Tursiops truncatus), in order to consider: 1) intraspecific and interspecific variation…
Asymmetry and dynamics of a narrow sonar beam in an echolocating harbor porpoise
Koblitz, Jens C.; Wahlberg, Magnus; Stilz, Peter; Madsen, Peter T.; Beedholm, Kristian; Schnitzler, Hans-Ulrich
The Journal of the Acoustical Society of America (2012)
A key component in the operation of a biosonar system is the radiation of sound energy from the sound producing head structures of toothed whales and microbats. The current view…
Keeping returns optimal: gain control exerted through sensitivity adjustments in the harbour porpoise auditory system
Linnenschmidt, M.; Beedholm, K.; Wahlberg, M.; Hojer-Kristensen, J.; Nachtigall, P. E.
Proceedings of the Royal Society B: Biological Sciences (2012)
Animals that use echolocation (biosonar) listen to acoustic signals with a large range of intensities, because echo levels vary with the fourth power of the animal's distance to the target.…
Assessment of the effect of natural and anthropogenic aquatic noise on vaquita (Phocoena sinus) through a numerical simulation
Castellazzi, Giovanni; Krysl, Petr; Rojas, Lorenzo; Cranford, Ted W.
Advances in Experimental Medicine and Biology (2012)
Phocoena sinus (vaquita) is a small marine harbor porpoise endemic to the Gulf of California that is believed to be the most endangered cetacean in the world as reported by…
Acoustic gaze adjustments during active target selection in echolocating porpoises
Wisniewska, D. M.; Johnson, M.; Beedholm, K.; Wahlberg, M.; Madsen, P. T.
Journal of Experimental Biology (2012)
Visually dominant animals use gaze adjustments to organize perceptual inputs for cognitive processing. Thereby they manage the massive sensory load from complex and noisy scenes. Echolocation, as an active sensory…
Stereotypical rapid source level regulation in the harbour porpoise biosonar
Linnenschmidt, Meike; Kloepper, Laura N.; Wahlberg, Magnus; Nachtigall, Paul E.
Naturwissenschaften (2012)
Some odontocetes and bats vary both click intensity and receiver sensitivity during echolocation, depending on target range. It is not known how this so-called automatic gain control is regulated by…