Results 131 to 140 of about 516 (167)
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Organochlorine contaminants in narwhal (Monodon monoceros) from the Canadian Arctic
Environmental Pollution, 1992Organochlorine pesticides (DDT, chlordane, polychlorinated camphenes (PCCs), dieldrin, hexachloroheclohexanes (SigmaHCH), mirex), polychlorinated biphenyl congeners (PCBs) and chlorobenzenes (SigmaCBz) were determined in blubber and liver of narwhal (Monodon monoceros) collected during 1982-1983 from Pond Inlet on northern Baffin Island in the Canadian
D C, Muir +4 more
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Aggressive tusk use by the narwhal (Monodon monoceros L.)
Nature, 1980The narwhal, an Arctic odontocete, has two horizontally embedded teeth at birth1. In males and a few females, the left tooth erupts at the end of the first year (K. A. Hay, personal communication) and develops into a spiralled tusk, which can be up to 260 cm long. It has been suggested that the tusk is used to disturb potential benthic prey2; to pierce
H. B. Silverman, M. J. Dunbar
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THE CHROMOSOME COMPLEMENT OF THE NARWHAL (Monodon monoceros)
Canadian Journal of Genetics and Cytology, 1973The karyotype of a male narwhal (Monodon monoceros) is described. The chromosome number was found to be 2n = 44. The karyotype is similar to all other whale species reported except that of the sperm whale (Physeter catodon), and the killer whale (Orcinus orca).The findings presented here add further support to the concept that the whales may be ...
J. C. Andrews +3 more
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Ploughshares
Abstract: The Spring 2025 Issue. Ploughshares is an award-winning journal of new writing. Since 1971, Ploughshares has discovered and cultivated the freshest voices in contemporary American literature, and now provides readers with thoughtful and entertaining literature in a variety of formats.
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Abstract: The Spring 2025 Issue. Ploughshares is an award-winning journal of new writing. Since 1971, Ploughshares has discovered and cultivated the freshest voices in contemporary American literature, and now provides readers with thoughtful and entertaining literature in a variety of formats.
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The Narwhal, Monodon monoceros, in Eastern Canadian Waters
Journal of the Fisheries Research Board of Canada, 1975In the Pond Inlet area of Baffin Island in 1963–65, 62 narwhals (Monodon monoceros) were caught in nets and examined. Growth layers occur in both the extruded tusk and in the embedded tooth. The few identifiable food remains in stomachs were of squid and Arctic cod. At birth, the calf measures about 160 cm in length and weighs just over 80 kg.
A. W. Mansfield, T. G. Smith, B. Beck
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Underwater acoustic signals of the narwhal (Monodon monoceros)
Canadian Journal of Zoology, 1978Underwater sound recordings of the narwhal from northern Baffin Island are analyzed and described. Frequency ranges of pulsed and pure tone vocalizations are found to be somewhat greater than previously observed. An earlier report that narwhals generate exclusively narrowband sounds is confirmed.
John K. B. Ford, H. Dean Fisher
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The narwhal ( Monodon monoceros ) cementum–dentin junction: A functionally graded biointerphase
Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 2014In nature, an interface between dissimilar tissues is often bridged by a graded zone, and provides functional properties at a whole organ level. A perfect example is a “biological interphase” between stratified cementum and dentin of a narwhal tooth.
Kathryn, Grandfield +8 more
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Some characteristics of narwhal,Monodon monoceros, diving behaviour in Baffin Bay
Canadian Journal of Zoology, 1995Dive data were collected from nine narwhals, Monodon monoceros, instrumented with satellite-linked dive recorders in northwest Greenland in August–September 1993 and 1994. Data were collected for periods ranging from a few weeks to 9 months. The narwhals made daily dives to depths of more than 500 m and frequently dived to 1000 m or more. However, most
Heide-Jørgensen, M. P., Dietz, R.
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Journal of Morphology, 1981
AbstractIn this study, the innervation of cerebrally related retial arteries in the narwhal Monodon monoceros was examined. Vessels were processed for the demonstration of adrenergic nerve endings by fluorescence histochemistry, and the results were confirmed by electron microscopy. Innervation of cerebrally related retial arteries was compared to that
A W, Vogl, Mary E, Todd, H D, Fisher
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AbstractIn this study, the innervation of cerebrally related retial arteries in the narwhal Monodon monoceros was examined. Vessels were processed for the demonstration of adrenergic nerve endings by fluorescence histochemistry, and the results were confirmed by electron microscopy. Innervation of cerebrally related retial arteries was compared to that
A W, Vogl, Mary E, Todd, H D, Fisher
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THE NARWHAL, MONODON MONOCEROS, IN THE NORWEGIAN HIGH ARCTIC
Marine Mammal Science, 1991AbstractNarwhals (Monodon monoceros) are known to frequent the waters of the Norwegian arctic archipelago of Svalbard. An attempt is made to summarize narwhal observations from the Svalbard area, and from this to deduce their distribution. Observations have been gathered from the literature, sealing vessel log books and official statistics.
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