Bioacoustics (2009)
Probably all odontocetes use echolocation for spatial orientation and detection of prey. We used a four hydrophone “Y” array to record the high frequency clicks from free-ranging White-beaked Dolphins Lagenorhynchus…
Functional morphology of the nasal complex in the harbor porpoise (Phocoena phocoena L.)
Huggenberger, Stefan; Rauschmann, Michael A.; Vogl, Thomas J.; Oelschläger, Helmut H. A.
Anatomical Record (2009)
Toothed whales (Odontoceti, Cetacea) are the only aquatic mammals known to echolocate, and probably all of them are able to produce click sounds and to synthesize their echoes into a…
Acoustic basis for fish prey discrimination by echolocating dolphins and porpoises
Au, Whitlow W. L.; Branstetter, Brian K.; Benoit-Bird, Kelly J.; Kastelein, Ronald A.
The Journal of the Acoustical Society of America (2009)
The biosonar system of dolphins and porpoises has been studied for about 5 decades and much has been learned [Au, W. W. L. (1993). The Sonar of Dolphins (Springer, New…
Scanning sonar of rolling porpoises during prey capture dives
Akamatsu, T.; Wang, D.; Wang, K.; Li, S.; Dong, S.
Journal of Experimental Biology (2009)
Dolphins and porpoises have excellent biosonar ability, which they use for navigation, ranging and foraging. However, the role of biosonar in free-ranging small cetaceans has not been fully investigated. The…
Emission of social sounds by marine animals
Au, W. W. L.; Hastings, M. C.
Principles of Marine Bioacoustics (2008)
(...) Sound emissions by odontocetes (toothed whales and dolphins) can be classified into two broad categories of frequency-varying continuous tonal sounds referred to as whistles and broadband clicks (Evans, 1967),…
Low-frequency components in harbor porpoise (Phocoena phocoena) clicks: communication signal, by-products, or artifacts?
Hansen, M.; Wahlberg, M.; Madsen, P. T.
The Journal of the Acoustical Society of America (2008)
Underwater sound signals for biosonar and communication normally have different source properties to serve the purposes of generating efficient acoustic backscatter from small objects or conveying information to conspecifics. Harbor…
Functional morphology of the hyolaryngeal complex of the harbor porpoise (Phocoena phocoena): Implications for its role in sound production and respiration
Huggenberger, Stefan; Rauschmann, Michael A.; Oelschläger, Helmut H. A.
Anatomical Record (2008)
In several publications, it was shown that echolocation sound generation in the nasal (epicranial) complex of toothed whales (Odontoceti) is pneumatically driven. Modern hypotheses consider the larynx and its surrounding…
Click train patterns of free-ranging harbour porpoises acquired using T-PODs may be useful as indicators of their behaviour
Koschinski, S.; Diederichs, A.; Amundin, M.
Journal of Cetacean Research and Management (2008)
Harbour porpoise signals consist of directional, high frequency stereotypic clicks which can be logged using T-PODs. Variation in interclick intervals (ICIs) can be used to distinguish different acoustic behaviours. So…
Harbor porpoise clicks do not have conditionally minimum time bandwidth product
Beedholm, Kristian
The Journal of the Acoustical Society of America (2008)
The hypothesis that odontocete clicks have minimal time frequency product given their delay and center frequency values is tested by using an in-phase averaged porpoise click compared with a pure…
The ontogeny of echolocation in a Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis)
Li, Songhai; Wang, Ding; Wang, Kexiong; Xiao, Jianqiang; Akamatsu, Tomonari
The Journal of the Acoustical Society of America (2007)
Acoustic and concurrent behavioral data from one neonatal male Yangtze finless porpoise (Neophocaena phocaenoides asiaeorientalis) in captivity were presented. The calf click train was first recorded at 22 days postnatal,…