Journal of Experimental Biology (2007)
Field recordings of harbour porpoises (Phocoena phocoena) were made in the inner Danish waters with a vertical array of three or four hydrophones. The back-calculated source level ranged from 178…
Spatial orientation in echolocating harbour porpoises (Phocoena phocoena)
Verfuss, U. K.
Journal of Experimental Biology (2005)
Studies concerning the echolocation behaviour of odontocetes focus mainly on target detection and discrimination, either in stationary animals or in animals approaching a specific target. We present the first data…
Echolocation by two foraging harbour porpoises (Phocoena phocoena)
Verfuss, U. K.; Miller, L. A.; Pilz, P. K. D.; Schnitzler, H.-U.
Journal of Experimental Biology (2009)
Synchronized video and high-frequency audio recordings of two trained harbour porpoises searching for and capturing live fish were used to study swimming and echolocation behaviour. One animal repeated the tasks…
Cetacean noise criteria revisited in the light of proposed exposure limits for harbour porpoises
Tougaard, Jakob; Wright, Andrew J.; Madsen, Peter T.
Marine Pollution Bulletin (2015)
The impact of underwater noise on marine life calls for identification of exposure criteria to inform mitigation. Here we review recent experimental evidence with focus on the high-frequency cetaceans and…
Diving behavior and performance of harbor porpoises, Phocoena phocoena, in Funka Bay, Hokkaido, Japan
Otani, Seiji; Naito, Yasuhiko; Kawamura, Akito; Kawasaki, Masahiro; Nishiwaki, Shigetoshi; Kato, Akiko
Marine Mammal Sci (1998)
In order to monitor the diving behavior of free-ranging cetaceans, microdataloggers, with pre-programmed release mechanisms, were attached to the dorsal fins of two female harbor porpoises (Phocoena phocoena) in Funka…
Temporary shift in masked hearing thresholds in a harbor porpoise (Phocoena phocoena) after exposure to seismic airgun stimuli
Lucke, Klaus; Siebert, Ursula; Lepper, Paul A.; Blanchet, Marie-Anne
The Journal of the Acoustical Society of America (2009)
An auditory study was conducted to derive data on temporary threshold shift (TTS) induced by single impulses. This information should serve as basis for the definition of noise exposure criteria…
Target detection by an echolocating harbor porpoise (Phocoena phocoena)
Kastelein, R. A.; Au, W. W. L.; Rippe, H. T.; Schooneman, N. M.
The Journal of the Acoustical Society of America (1999)
Two echolocation experiments are described. They were conducted on the same harbor porpoise housed in a sea pen, one year apart at Neeltje Jans, The Netherlands. The aims were to…
High frequency components of ship noise in shallow water with a discussion of implications for harbor porpoises (Phocoena phocoena)
Hermannsen, Line; Beedholm, Kristian; Tougaard, Jakob; Madsen, Peter T.
The Journal of the Acoustical Society of America (2014)
Growing ship traffic worldwide has led to increased vessel noise with possible negative impacts on marine life. Most research has focused on low frequency components of ship noise, but for…
Diel variation in echolocation behavior of wild harbor porpoises
Carlstrom, Julia
Marine Mammal Science (2005)
The echolocation rate and behavior of wild harbor porpoises were studied using a harbor porpoise click detector (POD) deployed close to the bottom at 40 m depth in Scottish waters,…
Harbour porpoises react to low levels of high frequency vessel noise
Dyndo, Monika; Wiśniewska, Danuta Maria; Rojano-Doñate, Laia; Teglberg Madsen, Peter
Scientific Reports (2015)
Cetaceans rely critically on sound for navigation, foraging and communication and are therefore potentially affected by increasing noise levels from human activities at sea. Shipping is the main contributor of…