Results 161 to 170 of about 1,522 (208)

Sexual dimorphism of Dall's porpoise and harbor porpoise skulls

Mammalian Biology, 2013
To evaluate and quantify sexual dimorphism of skull shape and assess the ontogenetic background for differences, samples of 134 harbor porpoise (Phocoena phocoena) and 85 Dall's porpoise (Phocoenoides dalli) were compared in terms of cranial shape and shape ontogeny using three-dimensional geometric morphometrics.
Anders Galatius
exaly   +2 more sources

HARBOR PORPOISE AND FISHERIES: AN UNCERTAINTY ANALYSIS OF INCIDENTAL MORTALITY

Ecological Applications, 1998
The harbor porpoise (Phocoena phocoena) in the western North Atlantic is subject to mortality due to entanglement in gillnets. Such incidental mortality threatens a population if it is too large relative to the potential population growth rate. Critical values for incidental mortality have been established by the International Whaling Commission and ...
Hal Caswell, Tim D Smith
exaly   +2 more sources

Wing design and morphology of the harbor porpoise dorsal fin

Journal of Morphology, 2003
AbstractThe correlation between skin structure and hydrodynamic design of the dorsal fin of the harbor porpoise (Phocoena phocoena) was examined. For the study of fin morphology and geometry, a scheme of sampling representing a two‐parameter mesh on the fin surface was used.
exaly   +3 more sources

Is there a distinct harbor porpoise subpopulation in the Marmara Sea?

Mitochondrial DNA Part A, 2016
Genetic population structure of geographically isolated endangered Black Sea harbor porpoise (Phocoena phocoena relicta) is little known in Turkish waters, especially in the Turkish Straits System (TSS- Marmara Sea, Bosphorus and Dardanelles), which connects the Black Sea and the Aegean Sea.
Tonay A. M., Yazici O., Dede A., Bilgin S., Danyer E., Aytemiz I., Maraci O., Ozturk A. A., Ozturk B., Bilgin R.   +9 more
openaire   +4 more sources

Harbor porpoise Phocoena phocoena ( )

William Keener, Ursula Siebert
exaly   +2 more sources

The Acoustic World of Harbor Porpoises

American Scientist, 2015
ingen
Wahlberg, Magnus, Linnenschmidt, Meike, Madsen, Professor Peter Teglberg; id_orcid 0000-0002-5208-5259, Wisniewska, Danuta Maria, Miller, Lee A.   +4 more
openaire   +3 more sources

Optics of the harbor porpoise eye in water

Journal of the Optical Society of America A, 1993
A two-dimensional ray-tracing model for the harbor porpoise eye is constructed from new measurements, mainly on two enucleated eyes, and from data found in the literature. Model calculations show that the crystalline lens has too much refractive power to focus light on the retina.
Kröger, R., Kirschfeld, K.
openaire   +3 more sources

Rhizopusmycosis in a Harbor Porpoise from the Baltic Sea

Journal of Wildlife Diseases, 1999
A case of systemic mycosis due to a Rhizopus sp. infection is described in a dead-stranded, 10-yr-old, male harbor porpoise (Phocoena phocoena) found on the beach of Neustadt, Schleswig-Holstein on the Baltic Sea (Germany). At necropsy, granulomatous mycotic lesions in brain, lung, kidneys, testis, and draining lymph nodes were found.
A, Wünschmann, U, Siebert, R, Weiss
openaire   +2 more sources

Noise Exposure Criteria for Harbor Porpoises

2016
Despite a major research effort, no generally accepted exposure limits are available for harbor porpoises. Recent studies of the temporary threshold shift (TTS) in porpoises indicate that the sound exposure levels (SELs) required to induce low levels of TTS depend on stimulus frequency and roughly parallel the shape of the audiogram.
Jakob, Tougaard, Andrew J, Wright, Peter Teglberg, Madsen   +2 more
openaire   +2 more sources

Prey capture by harbor porpoises.

The Journal of the Acoustical Society of America, 2008
The harbor porpoise (Phocoena phocoena) is a small toothed whale living mostly in coastal waters. There are large, but unknown, numbers in the inner Danish waters. Four are in captivity at Fjord Belt Center, Kerteminde, Denmark, one of which was born there in 2006.
openaire   +2 more sources