scholarly journals Cellulolysis in the fermentation chambers in Svalbard reindeer

Rangifer ◽  
1998 ◽  
Vol 18 (1) ◽  
pp. 47 ◽  
Author(s):  
W. Sørmo ◽  
Ø. E. Haga ◽  
S. D. Mathiesen
Keyword(s):  
Svalbard Reindeer

Cellulolysis in the fermentation chambers in Svalbard reindeer

scholarly journals Annual variability of heavy metal content in Svalbard reindeer faeces as a result of dietary preferences

2018 ◽  
Vol 25 (36) ◽  
pp. 36693-36701 ◽  
Author(s):  
Michał Hubert Węgrzyn ◽  
Paulina Wietrzyk ◽  
Sara Lehmann-Konera ◽  
Stanisław Chmiel ◽  
Beata Cykowska-Marzencka ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Content ◽  
Heavy Metal Content ◽  
Annual Variability ◽  
Dietary Preferences ◽  
Svalbard Reindeer

scholarly journals Digestive strategies of the high Arctic Svalbard reindeer

1995 ◽  
Vol 44 (Suppl. 1) ◽  
pp. 164-164
Author(s):  
W. Sormo ◽  
TD Josefsen ◽  
SD Mathiesen
Keyword(s):  
High Arctic ◽  
Svalbard Reindeer

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.

Svalbard reindeer as an indicator of ecosystem changes in the Arctic terrestrial ecosystem

Chemosphere ◽  
2018 ◽  
Vol 203 ◽  
pp. 209-218 ◽  
Author(s):  
Aneta Dorota Pacyna ◽  
Katarzyna Koziorowska ◽  
Stanisław Chmiel ◽  
Jan Mazerski ◽  
Żaneta Polkowska
Keyword(s):  
Terrestrial Ecosystem ◽  
The Arctic ◽  
Svalbard Reindeer ◽  
Ecosystem Changes

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

Do Svalbard reindeer regulate standing crop in the absence of predators?

Oecologia ◽  
1998 ◽  
Vol 116 (1-2) ◽  
pp. 202-206 ◽  
Author(s):  
Christina Wegener ◽  
Ann Marie Odasz-Albrigtsen
Keyword(s):  
Standing Crop ◽  
Svalbard Reindeer

Body condition in Svalbard reindeer and the use of blood parameters as indicators of condition and fitness

2003 ◽  
Vol 81 (9) ◽  
pp. 1566-1578 ◽  
Author(s):  
Jos M Milner ◽  
Audun Stien ◽  
R Justin Irvine ◽  
Steve D Albon ◽  
Rolf Langvatn ◽  
...  
Keyword(s):  
Body Condition ◽  
Subcutaneous Fat ◽  
Field Studies ◽  
Blood Parameters ◽  
Adult Survival ◽  
Late Winter ◽  
Blood Parameter ◽  
Ecological Fitness ◽  
Svalbard Reindeer ◽  
Fat Thickness

Body condition is an important determinant of ecological fitness but is difficult to measure in field studies of live animals. Live mass and subcutaneous fat are often used as proxies for body condition and related to fitness. We investigated the relationship between blood-chemistry parameters and live mass and back-fat thickness and assessed their usefulness as predictors of ecological fitness in a wild arctic ungulate population, Svalbard reindeer (Rangifer tarandus platyrhynchus). Female reindeer were sampled in late winter between 1995 and 2002 and concentrations of blood parameters were related to subsequent survival and successful calving. There was marked annual variation in all blood parameters, live mass, and back-fat thickness, reflecting variation in weather and food availability. At the individual level, variation in blood-parameter concentrations was not closely related to variation in live mass or back-fat thickness, instead reflecting shorter term nutritional status. Blood parameters could therefore provide useful additional information, enhancing the predictive power of fitness models based on live mass. The urea:creatinine ratio significantly improved adult survival models, while β-hydroxybutyric acid and creatinine concentrations were significant predictors of calving success. The applications for blood parameters in ecological investigations look promising and should be tested more widely in other field studies.

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