Results 171 to 180 of about 4,090 (196)
Some of the next articles are maybe not open access.
Microsatellite DNA evidence for genetic drift and philopatry in Svalbard reindeer
Molecular Ecology, 2002AbstractMainland populations of Arctic reindeer and caribou Rangifer tarandus often undergo extensive movements, whereas populations on islands tend to be isolated and sedentary. To characterize the genetic consequences of this difference, levels of genetic diversity and subdivision of Svalbard reindeer (R. t.
S D, Côté +5 more
openaire +4 more sources
Seasonal Iron Overload in Svalbard Reindeer Liver
The Journal of Nutrition, 1987Changes in liver iron concentration in relation to seasonal body weight variations and food iron intake have been investigated in 77 Svalbard reindeer by chemical and histological methods. During the winter season the body weight decreased about 43% in females and 39% in males. Liver weight was reduced about 65% in both sexes.
B, Borch-Iohnsen, K J, Nilssen
openaire +2 more sources
Synchrony in Svalbard reindeer population dynamics
Canadian Journal of Zoology, 2003We examined potential synchrony in the growth rates of three Svalbard reindeer (Rangifer tarandus platyrhynchus) populations and tested whether this pattern may result from correlated environmental variation. Two neighbouring populations had synchronized dynamics during the study period, while a more distant population showed different temporal ...
Ronny Aanes +5 more
openaire +1 more source
Predation of Svalbard reindeer by polar bears
Polar Biology, 2000Polar bears (Ursus maritimus) are believed to be obligate predators on marine mammals, and particularly, on two species of seals. This paper reports on observations of polar bears preying (n=7) and scavenging (n=6) on Svalbard reindeer (Rangifer tarandus platyrhyncus). Similar to their closest evolutionary ancestor, the brown bear (U.
Andrew E. Derocher +2 more
openaire +1 more source
Regulation of metabolic rate in Svalbard and Norwegian reindeer
American Journal of Physiology-Regulatory, Integrative and Comparative Physiology, 1984Food intake, body weight, serum levels of triiodothyronine (T3) and free thyroxine (FT4), and metabolic rate were measured at intervals in Svalbard (SR) and Norwegian (NR) reindeer. From summer to winter food intake decreased 57 (SR) and 55% (NR), while body weight decreased 8.6 (SR) and 3.8% (NR). In SR T3 and FT4 changed seasonally, whereas this was
K J, Nilssen, J A, Sundsfjord, A S, Blix
openaire +2 more sources
Metabolic strategies for winter survival by Svalbard reindeer
Canadian Journal of Zoology, 1993Lying and standing metabolic rates were determined for two tame Svalbard reindeer while the animals were in their winter lethargic state during January and February. Mean nonfasting metabolic rates for the 59-kg animals were 1.25 W∙kg−1 for lying and 1.64 W∙kg−1 for standing at rest.
L. C. Cuyler, N. A. Øritsland
openaire +1 more source
Svalbard reindeer and its interaction with extreme polar environment
2022Two distinct populations of Svalbard reindeer are compared based on their antler parameters. Relative antler size and number of tines are supposed to reflect well environmental conditions of the sedentary population within the growing season. Both studied populations are well spatially isolated due to high mountain ridges, glaciers and fjords.
openaire +2 more sources
Immigration and Regional Distribution of Abomasal Nematodes of Svalbard Reindeer
Journal of Biogeography, 1987Sixty-three adult (>1 year) Svalbard reindeer (Rangifer tarandus platyrhynchus) from the Arctic island Spitsbergen were all parasitized by abomasal nematodes of the family Trichostrongylidae. Seven species of nematodes were recorded. Of these, Grosspiculaqia occidentalis was found only in reindeer from inner parts of Nordenskiold Land, and specimens of
Karstein Bye +2 more
openaire +1 more source
Forage chemistry and fermentation chambers in Svalbard reindeer (Rangifer tarandus platyrhynchus)
Journal of Zoology, 1999AbstractSeasonal changes in the species composition and fibre content of plant fragments in the rumen and the gross anatomy of the gastrointestinal tract were investigated in Svalbard reindeer Rangifer tarandus platyrhynchus in western parts of Spitsbergen (Nordenskiöld Land (NL), 78°N), where the tundra vegetation is relatively abundant, and on the ...
W. Sørmo +4 more
openaire +1 more source
Comparison of the genetic variation in Svalbard and Norwegian reindeer
Canadian Journal of Zoology, 1985Polyacrylamide gel electrophoresis was used to score for genetic variation in 35 loci in Svalbard reindeer, Rangifer tarandus platyrhynchus, and in reindeer, Rangifer tarandus tarandus, from two localities in northern Norway. In R. t. platyrhynchus the proportion of polymorphic loci was 0.114 and the average heterozygosite was 0.030. In R. t. tarandus
openaire +1 more source