Results 171 to 180 of about 2,945 (211)

Paradoxical escape responses by narwhals ( Monodon monoceros )

Science, 2017
The flight of the narwhal Animals tend to respond to threats with the well-known behaviors of fight, flee, or freeze, each of which requires a different suite of physiological responses. Marine mammals face particular challenges because they may flee into an environment where oxygen is not available and pressure must be ...
Terrie M. Williams, Susanna B. Blackwell, Beau Richter, Mikkel-Holger S. Sinding, Mads Peter Heide-Jørgensen   +4 more
openaire   +3 more sources

Seasonal breeding of the narwhal (Monodon monoceros L.)

Canadian Journal of Zoology, 1974
The narwhal (Monodon monoceros) has been shown to be a seasonal breeder, like the closely related beluga (Delphinapterus leucas). The gestation period is estimated to be about 14 months, while the reproductive cycle is 2 or 3 years. Narwhals appear similar to other odontocetes in those reproductive aspects for which there is information.
R C, Best, H D, Fisher
openaire   +2 more sources

The migratory behaviour of narwhals (Monodon monoceros)

Canadian Journal of Zoology, 2003
Sixteen female narwhals (Monodon monoceros) were tracked by satellite in 2000 and 2001 from their summering ground near Somerset Island in the Canadian High Arctic to their wintering ground in central Baffin Bay. The wintering ground location was spatially discrete from another narwhal wintering ground in southern Baffin Bay.
Heide-Jørgensen, M. P., Dietz, R., Laidre, K. L., Richard, P., Orr, J., Schmidt, H. C.   +5 more
openaire   +2 more sources

Low-molecular weight metalloproteins in tissues of the narwhal (Monodon monoceros)

Comparative Biochemistry and Physiology Part C: Comparative Pharmacology, 1986
Narwhal (Monodon monoceros) liver and kidney cytosol were fractionated by gel chromatography, anion-exchange chromatography and electrophoresis. Cadmium was associated largely with low molecular weight proteins, while mercury was associated also with high molecular weight proteins, but apparently not because of saturation of the metallothionein ...
R, Wagemann, B, Hobden
openaire   +2 more sources

On the Stomach of the Narwhal (Monodon monoceros)

Proceedings of the Royal Society of Edinburgh, 1890
Although numerous most admirable descriptions of the stomach of various species of Delphinidae (the family of toothed Whales to which the Narwhal belongs) have from time to time appeared from the pens of most able observers (of whom a list will be found in the references appended), we have found it impossible to find anything more than a mere ...
G. Sims Woodhead, Robert W. Gray
openaire   +1 more source

Organochlorine contaminants in narwhal (Monodon monoceros) from the Canadian Arctic

Environmental Pollution, 1992
Organochlorine 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, C A, Ford, N P, Grift, R E, Stewart, T F, Bidleman   +4 more
openaire   +2 more sources

Aggressive tusk use by the narwhal (Monodon monoceros L.)

Nature, 1980
The 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
openaire   +1 more source

THE CHROMOSOME COMPLEMENT OF THE NARWHAL (Monodon monoceros)

Canadian Journal of Genetics and Cytology, 1973
The 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, F. J. Dill, S. Masui, H. D. Fisher   +3 more
openaire   +1 more source

The Narwhal, Monodon monoceros, in Eastern Canadian Waters

Journal of the Fisheries Research Board of Canada, 1975
In 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
openaire   +1 more source

Narwhal ( Monodon monoceros )

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.
openaire   +1 more source