Results 51 to 60 of about 4,090 (196)
Rangifer, 1986 The relationship between body fat reserves in autumn and age-specific mortality in winter were examined in Svalbard reindeer (Rangifer tarandus platyrhynchus Vrolik).
N. J.C. Tyler
doaj +1 more source
First ice core records of NO3− stable isotopes from Lomonosovfonna, Svalbard [PDF]
, 2014 Samples from two ice cores drilled at Lomonosovfonna, Svalbard, covering the period 1957–2009, and 1650–1995, respectively, were analyzed for NO3− concentrations, and NO3− stable isotopes (δ15N and δ18O).
Björkman, M. P. +8 more
core +1 more source
Mortality in Svalbard reindeer
Ecography, 1983 Mortality rates in Svalbard reindeer followed the “U”‐shaped pattern, with higher mortality rate among calves and old animals than in middle aged individuals. Assuming a stable population size, the mortality data predict a 16.2% annual mortality and recruitment rate among 6 months and older animals, and a male:female sex ratio of 48.5:51.5 among 1‐yr ...
openaire +1 more source
RUMEN MICROBIAL ADAPTATION TO FIBER DIGESTION IN SVALBARD REINDEER [PDF]
Canadian Journal of Animal Science, 1984 The dominant rumen microorganisms of the high-arctic reindeer from Svalbard (77–81°N) were characterized in summer and winter. Their in vitro fiber digesting ability and VFA production have been examined. It was determined that 74% of the bacteria isolated from animals shot in winter could digest fiber, and 30% in summer.
SVEIN DISCH MATHIESEN +2 more
openaire +1 more source
Direction of escape in reindeer
Rangifer, 1997 We tested the hypothesis that reindeer prefer to run uphill and upwind when escaping from man. Groups of wild and feral reindeer in Norway, Svalbard and on Wrangel Island were approached and their behaviour and direction of escape were recorded.
Leonid M. Baskin, Terje Skogland
doaj +1 more source
Floral Herbivory of Dryas octopetala by Svalbard Reindeer
Arctic, Antarctic, and Alpine Research, 2003 Abstract In polar semidesert communities of northwest Spitsbergen the reproductive potential of keystone vascular plant species, such as Dryas octopetala, is currently being constrained by low summer temperatures, resulting in the infrequent production of viable seeds.
Cooper, Elisabeth J, Wookey, Philip
openaire +1 more source
Transferrin variation and evolution of Alaskan reindeer and caribou, Rangifer tarandus L.
Rangifer, 1986 Polyacrylamide gel electrophoresis was used to analyse transferrin variation in wild caribou (Rangifer tarandus granti) and domestic reindeer (R.t. tarandus) from Alaska. Eighteen alleles were detected in caribou and ten alleles were detected in reindeer.
Knut H. Røed, Ken R. Whitten
doaj +1 more source
Density-dependent switches in diet:a likely mechanism for negative feedbacks on goose population increase? [PDF]
, 2009 Goose grazing on arctic tundra vegetation has shown both positive and negative effects on subsequent foraging conditions. To understand the potential of a density-dependent feedback on herbivore population size, the relation between grazing pressure and ...
Kuijper, Dries Pieter Jan +2 more
core +1 more source
Functional and comparative digestive system anatomy of Arctic ungulates
Rangifer, 2011 Dietary niche, feeding type classification and seasonal strategies of Rangifer tarandus and Ovibos moschatus discussed in relation to the anatomy of their digestive system.
R. R. Hofmann
doaj +1 more source