Aquatic Mammals (2012)
For many toothed whales, two predominant and multifunctional spatial positions occur between a mother/calf pair after birth: (1) the echelon position and (2) the infant position. Other nonpredominant positions also…
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…
Organization and number of orexinergic neurons in the hypothalamus of two species of Cetartiodactyla: A comparison of giraffe (Giraffa camelopardalis) and harbour porpoise (Phocoena phocoena)
Dell, Leigh-Anne; Patzke, Nina; Bhagwandin, Adhil; Bux, Faiza; Fuxe, Kjell; Barber, Grace; Siegel, Jerome M.; Manger, Paul R.
Journal of Chemical Neuroanatomy (2012)
The present study describes the organization of the orexinergic (hypocretinergic) neurons in the hypothalamus of the giraffe and harbour porpoise – two members of the mammalian Order Cetartiodactyla which is…
First records of anomalously white harbour porpoises (Phocoena phocoena) in the Turkish seas with a global review
Tonay, Arda M.; Bilgin, Sabri; Dede, Ayhan; Akkaya, Aylin; Yeşilçiçek, Tuncay; Köse, Özay; Ceylan, Yusuf
Hystrix - The Italian Journal of Mammalogy (2012)
Three anomalously white harbour porpoises (Phocoena phocoena) were reported from Turkish Seas. One of them was bycaught on 19 June 2011 in bottom gill nets off the eastern coast of…
Insufficient data are available to predict the success of protected areas for the vaquita (Phocoena sinus): A critique of Gerrodette and Rojas-Bracho (2011)
Lonergan, Mike
Marine Mammal Science (2012)
(...) Gerrodette and Rojas-Bracho (2011) fit a quite detailed Bayesian model to sparse data on vaquita (Phocoena sinus) abundance in order to investigate the likely effects of different degrees of…
Two new extinct basal phocoenids (Cetacea, Odontoceti, Delphinoidea), from the upper Miocene Koetoi Formation of Japan and their phylogenetic significance
Murakami, Mizuki; Shimada, Chieko; Hikida, Yoshinori; Hirano, Hiromichi
Journal of Vertebrate Paleontology (2012)
Two new extinct porpoises—Archaeophocaena teshioensis, gen. et sp. nov., and Miophocaena nishinoi, gen. et sp. nov.—are described from the upper Miocene Koetoi Formation (5.5–6.4 Ma) of Hokkaido, Northern Japan. The…
Unusual mass mortality of cetaceans on the coast of the Turkish western Black Sea in summer 2009
Tonay, Arda M.; Dede, Ayhan; Öztürk, Ayaka Amaha; Ercan, Didem; Fernández, Antonio
Journal of the Black Sea/Mediterranean Environment (2012)
Between mid-July and early August, an unusual mass mortality of cetaceans was detected on the Turkish Western Black Sea coast. 114 cetaceans (53 harbour porpoises, 9 common dolphins, 7 bottlenose…
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.…
An unusual mortality event of Harbor porpoises (Phocoena phocoena) off central California: Increase in blunt trauma rather than an epizootic
Wilkin, Sarah; Cordaro, Joe; Gulland, Frances M. D.; Wheeler, Elizabeth; Dunkin, Robin; Sigler, Teri; Casper, Dave; Berman, Michelle; Flannery, Moe; Fire, Spencer; Wang, Zhihong; Colegrove, Kathleen; Baker, Jason
Aquatic Mammals (2012)
In 2007, the apparent increase in the number of harbor porpoises (Phocoena phocoena) stranding along the central California coast compared to the number of strandings the previous year resulted in…
The modulation rate transfer function of a harbour porpoise (Phocoena phocoena)
Linnenschmidt, Meike; Wahlberg, Magnus; Damsgaard Hansen, Janni
Journal of Comparative Physiology A (2012)
During echolocation, toothed whales produce ultrasonic clicks at extremely rapid rates and listen for the returning echoes. The auditory brainstem response (ABR) duration was evaluated in terms of latency between…