Co-feeding between Svalbard Rock Ptarmigan (Lagopus muta hyperborea) and Svalbard Reindeer (Rangifer tarandus platyrhynchus)

ARCTIC ◽  
2009 ◽  
Vol 59 (1) ◽  
Author(s):  
Å.O. Pedersen ◽  
M. Lier ◽  
H. Routti ◽  
H.H. Christiansen ◽  
E. Fuglei
Keyword(s):  
Rangifer Tarandus ◽  
Rock Ptarmigan ◽  
Svalbard Reindeer ◽  
Lagopus Muta

Rock Ptarmigan (Lagopus muta)

2020 ◽  
Author(s):  
Robert Montgomerie ◽  
Karen Holder
Keyword(s):  
Rock Ptarmigan ◽  
Lagopus Muta

scholarly journals Svalbard reindeer (Rangifer tarandus platyrhynchus) antler characteristics reflecting the local environmental conditions

2019 ◽  
Vol 46 (1) ◽  
pp. 16-23
Author(s):  
Jan Kavan ◽  
Veronika Anděrová
Keyword(s):  
Environmental Conditions ◽  
Rangifer Tarandus ◽  
Well Being ◽  
Climatic Conditions ◽  
High Mountain ◽  
Atmospheric Conditions ◽  
Individual Subject ◽  
Svalbard Reindeer ◽  
Invasive Method ◽  
Antler Size

AbstractA new non-invasive method based on picture analysis was used to estimate the conditions in Svalbard reindeer populations. The well-being of an individual subject is often expressed through visual indices. Two distinct reindeer populations were compared based on their antler parameters. Relative antler size and number of tines are variables supposed to reflect correspondingly the environmental conditions of sedentary populations within the growing season. The occurrence areas of two studied populations are distinctly isolated – separated with high mountain ridges, glaciers and fjords. The population in Petuniabukta occupies a sparsely vegetated region with harsh climatic conditions, whereas Skansbukta represents an area with continuous tundra vegetation cover, milder climatic conditions and, consequently, also a longer vegetation season. These environmental factors probably caused significant differences in the relative antler size and number of tines in the studied species. The Skansbukta population exhibited a larger relative antler size and higher number of tines than the population in Petuniabukta (both parameters differed significantly, p < 0.01). This difference reflects concisely the different environmental conditions of both locations. A comparison of Skansbukta population antler characteristics between years 2017 and 2018 did not reveal significant changes, most probably due to very similar atmospheric conditions in these two years (in terms of air temperature).

scholarly journals Energy expenditure of free-living reindeer estimated by the doubly labelled water method

Rangifer ◽  
2000 ◽  
Vol 20 (2-3) ◽  
pp. 211 ◽  
Author(s):  
Geir Gotaas ◽  
Eric Milne ◽  
Paul Haggarty ◽  
Nicholas J.C. Tyler
Keyword(s):  
Energy Expenditure ◽  
Rangifer Tarandus ◽  
Water Flux ◽  
Co2 Production ◽  
Wild Ungulates ◽  
Free Living ◽  
Doubly Labelled Water ◽  
Svalbard Reindeer ◽  
Mountain Pasture ◽  
The Mean

The doubly labelled water (DLW) method was used to measure total energy expenditure (TEE) in three male reindeer (Rangifer tarandus tarandus) aged 22 months in winter (February) while the animals were living unrestricted at natural mountain pasture in northern Norway (69&deg;20'N). The concentrations of 2H and l8O were measured in water extracted from samples of faeces collecred from the animals 0.4 and 11.2 days after injection of the isotopes. Calculated rates of water flux and CO2-production were adjusted to compensate for estimated losses of 2H in faecal solids and in methane produced by microbial fermentation of forage in the rumen. The mean specific TEE in the three animals was 3.057 W.kg-1 (range 2.436 - 3.728 W.kg1). This value is 64% higher than TEE measured by the DLW method in four captive, non-pregnant adult female reindeer in winter and probably mainly reflects higher levels of locomotor activity in the free-living animals. Previous estimates of TEE in free-living Rangifer in winter based on factorial models range from 3.038 W.kg-1 in female woodland caribou (R. t. caribou) to 1.813 W.kg-1 in female Svalbard reindeer (R. t. platyrhynchus). Thus, it seems that existing factorial models are unlikely to overestimate TEE in reindeer/caribou: they may, instead, be unduly conservative. While the present study serves as a general validation of the factorial approach, we suggest that the route to progress in the understanding of field energetics in wild ungulates is via application of the DLW method.

Natal Dispersal and Survival of Juvenile Rock Ptarmigan Lagopus Muta in the French Alps and Pyrenees

Ardeola ◽  
2020 ◽  
Vol 68 (1) ◽  
Author(s):  
Claude Novoa ◽  
Jean Resseguier ◽  
Bertrand Muffat-Joly ◽  
Josep Blanch Casadesus ◽  
Marc Arvin-Bérod ◽  
...  
Keyword(s):  
Natal Dispersal ◽  
Rock Ptarmigan ◽  
French Alps ◽  
Lagopus Muta

scholarly journals Reduced Metabolic Cost of Locomotion in Svalbard Rock Ptarmigan (Lagopus muta hyperborea) during Winter

PLoS ONE ◽  
2010 ◽  
Vol 5 (11) ◽  
pp. e15490 ◽  
Author(s):  
John Lees ◽  
Robert Nudds ◽  
Karl-Arne Stokkan ◽  
Lars Folkow ◽  
Jonathan Codd
Keyword(s):  
Metabolic Cost ◽  
Rock Ptarmigan ◽  
Cost Of Locomotion ◽  
Lagopus Muta

Cadmium concentrations in tissues of willow ptarmigan (Lagopus lagopus) and rock ptarmigan (Lagopus muta) in Nunavik, Northern Québec

2007 ◽  
Vol 147 (3) ◽  
pp. 642-647 ◽  
Author(s):  
Jean Rodrigue ◽  
Louise Champoux ◽  
Daniel Leclair ◽  
Jean-François Duchesne
Keyword(s):  
Rock Ptarmigan ◽  
Willow Ptarmigan ◽  
Lagopus Lagopus ◽  
Lagopus Muta

Comparison of the genetic variation in Svalbard and Norwegian reindeer

1985 ◽  
Vol 63 (9) ◽  
pp. 2038-2042 ◽  
Author(s):  
K. H. Røed
Keyword(s):  
Genetic Variation ◽  
Rangifer Tarandus ◽  
Polyacrylamide Gel Electrophoresis ◽  
Divergence Time ◽  
Recent Time ◽  
Evolutionary Divergence ◽  
Average Heterozygosity ◽  
Polymorphic Loci ◽  
Svalbard Reindeer ◽  
Long Time

Polyacrylamide 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 the proportion of polymorphic loci was 0.171–0.286 and the average heterozygosity was 0.043–0.045. Excluding the variability in the locus coding for transferrin from calculations reduced the average heterozygosity to 0.020 in R. t. platyrhynchus and to 0.021–0.025 in R. t. tarandus, suggesting that the amount of genetic variation in R. t. platyrhynchus is not very different from that in R. t. tarandus. Unique alleles in the loci coding for transferrin and acid phosphatase for the two subspecies indicate that there has been no interbreeding in recent time. The genetic distance between the two subspecies is within the same range as between subspecies of other organisms. Evolutionary divergence time based on the protein data indicates that either the divergence between these subspecies was initiated a very long time ago or R. t. platyrhynchus originates from other subspecies of reindeer.

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