Mar Mam Sci (2012)
During ship surveys harbor porpoises are only visible when breaking the sea surface to breathe, while during aerial surveys they may be seen down to 2 m below the surface.…
Is a German harbour porpoise much more sensitive than a British one? Comparative analyses of mandatory measures for the protection of harbour porposes (Phocoena phocoena) during offshore wind farm ramming in Germany, Denmark and the UK
Luedeke, Jens
Proceedings of Meetings on Acoustics (2012)
Offshore wind farms (OWF) will soon contribute to significant growth in the renewable energy sector. At present just a few OWF have been built. As of 2012, Germany has an…
Behavioral reactions of harbor porpoise to pile-driving noise
Tougaard, Jakob; Kyhn, Line A.; Amundin, Mats; Wennerberg, Daniel; Bordin, Carolina
Advances in Experimental Medicine and Biology (2012)
Pile driving of large steel monopiles in offshore waters has increased rapidly in recent years due to the expanding development of offshore wind energy. In particular, Phocoena phocoena (harbor porpoise)…
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…
Cetacean strandings in the Turkish western Black Sea coast during 2007-2009
Tonay, Arda M.; Dede, Ayhan; Öztürk, Ayaka Amaha; Öztürk, Bayram
Journal of the Black Sea/Mediterranean Environment (2012)
The seasonal surveys of stranded cetaceans were performed on the Turkish coast of the western Black Sea during summer 2007-spring 2009. Fifty stranded cetaceans were found, which included 24 harbour…
Biosonar, dive, and foraging activity of satellite tracked harbor porpoises (Phocoena phocoena)
Linnenschmidt, Meike; Teilmann, Jonas; Akamatsu, Tomonari; Dietz, Rune; Miller, Lee A.
Mar Mam Sci (2012)
This study presents bioacoustic recordings in combination with movements and diving behavior of three free-ranging harbor porpoises (a female and two males) in Danish waters. Each porpoise was equipped with…
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…
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.…
Cetacean abundance estimates in US northwestern Atlantic Ocean waters from summer 2011 line transect survey
Palka, D.
NEFSC Reference Document 12-29 (2012)
As part of the AMAPPS (Atlantic Marine Assessment Program for Protected Species) project, the Northeast Fisheries Science Center (NEFSC) and Southeast Fisheries Science Center (SEFSC) of NOAA Fisheries Service conducted…
Severe progressive meningoencephalitis due to Cryptococcus sp. in a live-stranded harbor porpoise (Phocoena phocoena) undergoing rehabilitation
Haulena, M.; Himsworth, C.; Anderson, C.; Akhurst, L.; Ivančić, M.; Malpas, D.A.; Pollock, J.S.; Raverty, S.
Conference of the International Association for Aquatic Animal Medicine (2012)
Cryptococcus gatti is an important infectious disease in the northeastern Pacific. The condition has been associated with significant mortality in harbor porpoise (Phocoena phocoena), Dall’s porpoise (Phocoenoides dalli) and Pacific…