Supernumerary postcanine teeth in the kuril seal (Phoca vitulina stejnegeri), the larga seal (Phoca largha) and the ribbon seal (Phoca fasciata).
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Brightness discrimination in the harbor seal (Phoca vitulina)
The brightness discrimination ability of a male harbor seal was investigated at an ambient illumination of 0.9lx. The visual stimuli consisted of circular gray discs that were presented on a black background on a TFT monitor. Eight standard intensities were tested against sets of lower comparison intensities. In accordance with Weber's law we observed a constant gain of the just noticeable inte...
متن کاملRelative immunocompetence of the newborn harbour seal, Phoca vitulina.
The immune system of many mammalian species is not fully developed at birth, with newborns obtaining temporary immunological protection from maternal antibodies. Little is known of the immune system of the harbour seal, and developmental aspects of its immune system have not been systematically studied. We collected blood and milk samples from nine free-ranging mother-pup pairs throughout the l...
متن کاملArthrobacter nasiphocae sp. nov., from the common seal (Phoca vitulina).
An unknown gram-positive, catalase-positive, strictly aerobic, rod-shaped bacterium was isolated from the nasal cavities of two common seals. Chemical analysis revealed the presence in the bacterium of a hitherto unknown cell-wall murein [type: L-Lys-L-Ala2-Gly(2-3)-L-Ala (Gly)]. Comparative 16S rRNA gene sequencing showed that the unidentified rod was related to the Arthrobacter group of organ...
متن کاملDolphin morbillivirus infection in a captive harbor seal (Phoca vitulina).
During the second morbillivirus epidemic (2007 to 2011) in cetaceans along the Italian coastline, dolphin morbillivirus (DMV) was detected by molecular analyses in a captive harbor seal (Phoca vitulina), with pathological findings consistent with morbillivirus infection. This report confirms interspecies DMV transmission from cetaceans to pinnipeds.
متن کاملHARBOR SEAL (Phoca vitulina): Western North Atlantic Stock 2009
STOCK DEFINITION AND GEOGRAPHIC RANGE The harbor seal is found in all nearshore waters of the Atlantic Ocean and adjoining seas north of 30oN (Katona et al. 1993). In the western North Atlantic, they are distributed from the eastern Canadian Arctic and Greenland south to southern New England and New York, and occasionally to the Carolinas (Mansfield 1967; Boulva and McLaren 1979; Katona et al. ...
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ژورنال
عنوان ژورنال: Japanese Journal of Oral Biology
سال: 1990
ISSN: 0385-0137
DOI: 10.2330/joralbiosci1965.32.323