Marine Mammal Science (2019)
Research has shown that noise disturbance can disrupt the behavior of harbor porpoises. The significance of such disturbance is unclear. However, these animals may be vulnerable to starvation when disturbed…
Time of arrival difference estimation for narrow band high frequency echolocation clicks
Gillespie, Douglas; Macaulay, Jamie
The Journal of the Acoustical Society of America (2019)
Algorithms are presented for the accurate time of arrival difference estimation of high frequency narrow band echolocation clicks from Harbor Porpoise. These clicks typically have a center frequency of around…
Unexpected mid‐winter presence of harbor porpoises (Phocoena phocoena) in Kotzebue Sound, Alaska
Whiting, Alex; Castellote, Manuel; Small, Robert J.; Frost, Kathryn J.; Suydam, Robert
Marine Mammal Science (2019)
...Harbor porpoises have been reported as an uncommon species in Kotzebue Sound during the ice-free months of June through October (Frost & Lowry, 1990), but their presence in Kotzebue Sound…
The use of seal scarers as a protective mitigation measure can induce hearing impairment in harbour porpoises
Schaffeld, Tobias; Ruser, Andreas; Woelfing, Benno; Baltzer, Johannes; Kristensen, Jakob H.; Larsson, Josefin; Schnitzler, Joseph G.; Siebert, Ursula
The Journal of the Acoustical Society of America (2019)
Acoustic deterrent devices (ADDs) are used to deter seals from aquacultures but exposure of harbour porpoises (Phocoena phocoena) occurs as a side-effect. At construction sites, by contrast, ADDs are used…
Cytokine expression and lymphocyte proliferative capacity in diseased harbor porpoises (Phocoena phocoena) – Biomarkers for health assessment in wildlife cetaceans
Lehnert, Kristina; Siebert, Ursula; Reißmann, Kristina; Bruhn, Regina; McLachlan, Michael S.; Müller, Gundi; van Elk, Cornelis E.; Ciurkiewicz, Malgorzata; Baumgärtner, Wolfgang; Beineke, Andreas
Environmental Pollution (2019)
Harbor porpoises (Phocoena phocoena) in the North and Baltic Seas are exposed to anthropogenic influences including acoustic stress and environmental contaminants. In order to evaluate immune responses in healthy and…
Clinical, pathological, and laboratory diagnoses of diseases of harbour porpoises (Phocoena phocoena), live stranded on the Dutch and adjacent coasts from 2003 to 2016
van Elk, Cornelis E.; van de Bildt, Marco W. G.; van Run, Peter R. W. A.; Bunskoek, Paulien; Meerbeek, Jolanda; Foster, Geoffrey; Osterhaus, Albert D. M. E.; Kuiken, Thijs
Veterinary Research (2019)
Harbour porpoises (Phocoena phocoena) in the North Sea live in an environment heavily impacted by humans, the consequences of which are a concern for their health. Autopsies carried out on…
Heavy metals in bones from harbour porpoises Phocoena phocoena from the western Black Sea coast
Evtimova, Violeta; Parvanov, Dimitar; Grozdanov, Atanas; Tserkova, Feriha; Zlatkov, Boyan; Vergilov, Vladislav; Sivilov, Ognyan; Yordanov, Stoyan; Delov, Ventseslav
ZooNotes (2019)
During the last few years, the Western Black Sea coast has documented increase in the number of stranded marine mammals, particularly the harbour porpoise (Phocoena phocoena). This species is a…
Behavioral responses of harbor porpoises (Phocoena phocoena) to U.S. Navy 53C sonar signals in noise
Kastelein, Ronald A.; Ainslie, Michael A.; van Kester, Ruby
Aquatic Mammals (2019)
Naval sonar systems produce signals that may affect the behavior of harbor porpoises (Phocoena phocoena), and behavioral responses may be influenced by the received signal and by the signal-to-noise ratio…
Context-dependent biosonar adjustments during active target approaches in echolocating harbour porpoises
Ladegaard, Michael; Madsen, Peter Teglberg
The Journal of Experimental Biology (2019)
Echolocating mammals generally target individual prey items by transitioning through the biosonar phases of search (slow-rate, high-amplitude outputs), approach (gradually increasing rate and decreasing output amplitude) and buzzing (high-rate, low-amplitude…
The effects of visual impediment on the approaching behavior of harbor porpoise, Phocoena phocoena
Maezawa, Tomoki; Matsuishi, Takashi; Ito, Kiyohide; Kaji, Seiichi; Tsunokawa, Masatoshi; Kawahara, Jun I.
Mammal Study (2019)
Studies on odontocetes (e.g., porpoises) have revealed that these animals may adaptively use vision. The present study examined the contributions of vision to the approaching behavior of the harbor porpoise…