Browsing Artikler, rapporter, filmer / Articles, reports, movies by Subject "VDP::Mathematics and natural science: 400::Zoology and botany: 480"
Now showing items 1-20 of 77
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A Migratory Northern Ungulate in the Pursuit of Spring: Jumping or Surfing the Green Wave?
(Journal article; Peer reviewed, 2012)The forage-maturation hypothesis (FMH) states that herbivores migrate along a phenological gradient of plant development in order to maximize energy intake. Despite strong support for the FMH, the actual relationship ... -
Balancing hunting regulations and hunter satisfaction: An integrated biosocioeconomic model to aid in sustainable management
(Journal article; Peer reviewed, 2012)Hunting of game animals needs to be regulated, either through the number of permits or the bag size allowed per hunter. Such regulations may, however, jeopardize hunter satisfaction, on which game managers depend. Consequently, ... -
Behavioural Responses to Thermal Conditions Affect Seasonal Mass Change in a Heat-Sensitive Northern Ungulate
(Journal article; Peer reviewed, 2013)Background Empirical tests that link temperature-mediated changes in behaviour (activity and resource selection) to individual fitness or condition are currently lacking for endotherms yet may be critical to understanding ... -
Big Cats in Our Backyards: Persistence of Large Carnivores in a Human Dominated Landscape in India
(Journal article; Peer reviewed, 2013)Protected areas are extremely important for the long term viability of biodiversity in a densely populated country like India where land is a scarce resource. However, protected areas cover only 5% of the land area in ... -
Body Temperature during Hibernation Is Highly Correlated with a Decrease in Circulating Innate Immune Cells in the Brown Bear (Ursus arctos): A Common Feature among Hibernators?
(Journal article; Peer reviewed, 2013)Background: Hibernation involves periods of severely depressed metabolism (torpor) and decreases in body temperature (Tb). Small arctic mammals (<5kg), in which Tb generally drop drastically, display leukopenia during ... -
Boom and bust of a moose population – a call for integrated forest management
(Journal article; Peer reviewed, 2013)There is increasing pressure to manage forests for multiple objectives, including ecosystem services and biodiversity, alongside timber production. However, few forests are currently co-managed for timber and ... -
Building a mechanistic understanding of predation with GPS-based movement data
(Journal article; Peer reviewed, 2010)Quantifying kill rates and sources of variation in kill rates remains an important challenge in linking predators to their prey. We address current approaches to using GPS-based movement data for quantifying key predation ... -
Capture, Anesthesia, and Disturbance of Free-Ranging Brown Bears (Ursus arctos) during Hibernation
(Journal article; Peer reviewed, 2012)We conducted thirteen immobilizations of previously collared hibernating two- to four-year-old brown bears (Ursus arctos) weighing 21–66 kg in central Sweden in winter 2010 and 2011 for comparative physiology research. ... -
Cascading effects of moose (Alces alces) management on birds
(Journal article; Peer reviewed, 2011)Large herbivores often have key functions in their ecosystems, and may change ecosystem processes with cascading effects on other animals. The mechanisms often involve relocations of resources of various kinds, including ... -
Changes in pH and organic acids in mucilage of Eriophorum angustifolium roots after exposure to elevated concentrations of toxic elements
(Journal article; Peer reviewed, 2012)The presence of Eriophorum angustifolium in mine tailings of pyrite maintains a neutral pH, despite weathering, thus lowering the release of toxic elements into acid mine drainage water. We investigated if the presence of ... -
Comparing predation on forest grouse nests by avian and mammalian predators in two contrasting boreal forest landscapes by the use of artificial nests
(Journal article; Peer reviewed, 2012)Egg predation is an important determinant of breeding success among boreal forest grouse, but the relative roles ofmammalian and avian predators are poorly known. During spring/early summer of 2010, predation on artificial ... -
Comparison of fatty acids and elemental nutrients in periphyton, invertebrates, and cutthroat trout (Oncorhyncus clarki) in conifer and alder streams of western Washington state
(Journal article; Peer reviewed, 2011)Organism growth and reproduction are often limited by nutrient availability in freshwater ecosystems where, in some cases, food webs are primarily supported by allochthonous organic matter. Therefore, we hypothesized that ... -
Concurrent effects of age class and food distribution on immigration success and population dynamics in a small mammal
(Journal article; Peer reviewed, 2013)1. During the settlement stage of dispersal, the outcome of conflicts between residents and immigrants should depend on the social organization of resident populations as well as on individual traits of immigrants, such ... -
Contrasting responses of two passerine bird species to moose browsing
(Journal article; Peer reviewed, 2012)Large herbivores may modify the ecosystem in a way that affects habitat quality and resource availability for other fauna. The increase in wild ungulate abundance in many areas may therefore lead to ecosystem changes, affecting ... -
Culling calves
(Journal article, 2010)The shooting of calves or fawns can be a controversial matter. While in some countries the consensus among deer managers for the culling of calves is clear, it is often less clear exactly why. Jos Milner & Atle Mysterud ... -
Declining reproductive output in capercaillie and black grouse – 16 countries and 80 years
(Journal article; Peer reviewed, 2016)Declines in populations of capercaillie (Tetrao urogallus) and black grouse (Lyrurus tetrix) have been reported from both Central Europe and the continuous boreal forests of Fennoscandia. While intensified land-use is ... -
Decomposing risk: landscape structure and wolf behavior generate different predation patterns in two sympatric ungulates
(Journal article; Peer reviewed, 2013)Recolonizing carnivores can have a large impact on the status of wild ungulates, which have often modified their behavior in the absence of predation. Therefore, understanding the dynamics of reestablished predator–prey ... -
Does large herbivore removal affect secondary metabolites, nutrients and shoot length in woody species in semi-arid savannas?
(Journal article; Peer reviewed, 2013)We hypothesised that exclusion of long-term browsing leads to decreased nutrient concentrations, increased carbon-based secondary metabolites (CBSMs) and decreased shoot length in woody plants in semi-arid savannas. To ... -
Drivers of hibernation in the brown bear
(Journal article; Peer reviewed, 2016)Background: Hibernation has been a key area of research for several decades, essentially in small mammals in the laboratory, yet we know very little about what triggers or ends it in the wild. Do climatic factors, an ... -
Ecological correlates of a tick-borne disease, Anaplasma phagocytophilum, in moose in southern Norway
(Journal article; Peer reviewed, 2013)As the distribution and abundance of ticks increase, so do the risks of tick-borne diseases. Anaplasma phagocytophilum, transmitted by Ixodes spp. ticks, is a widespread tick-borne infection causing tick-borne fever (TBF) ...