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(Master thesis / Hovedoppgave, 2004)To understand the ecological effects of large herbivores, it is important to understand foraging behaviour and how this is affected by density. In this experiment, domestic sheep (Ovis aries) were kept at high (80 sheep ...
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(Master thesis / Masteroppgave, 2005)It is stated that the feral American mink (Mustela vison), an introduced predator to Europe, have seriously affected local densities of birds breeding in coastal areas. I studied the effect of mink removal on breeding ...
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(Master thesis / Masteroppgave, 2005)To test if dispersers use odour to discriminate between familiar and unfamiliar individuals male and female root voles (Microtus oeconomus) were given the opportunity to choose between one familiar and one unfamiliar test ...
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(Master thesis / Masteroppgave, 2005)Population sizes of large carnivores have increased in Scandinavia during the last century. Increases in predator population sizes can affect prey populations not only through increased mortality, but also through behavioural ...
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(Master thesis / Masteroppgave, 2006)Snow leopards (Uncia uncia) inhabit the remote mountain ranges of the Himalayas, and are currently listed as Endangered. Due to their inaccessible habitat and sparse distribution it is difficult to compile exact estimates ...
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(Master thesis / Masteroppgave, 2006)Abstract In the recent decades large carnivores have started to recolonize former occupied areas in North America and in Europe. Increases in predator population sizes can affect the whole ecosystem functioning, but little ...
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(Master thesis / Hovedoppgave, 2006)During three subsequent reproductive seasons with contrasting food availability, the King Penguin Aptenodytes patagonicus responses were monitored in a small colony at Husvik, South Georgia. Observations of metal flipper ...
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(Master thesis / Masteroppgave, 2006)Abstract The heterospecific attraction hypothesis suggests that migrants cue on residents with similar ecological needs to find suitable breeding sites, and that they have reproductive fitness benefits from doing so. In ...
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(Master thesis / Masteroppgave, 2006)Abstract A lot of studies have been performed on demographic changes in ungulate population due to density dependence, but little is done on density dependent changes in foraging behaviour which can be a mechanism of such ...
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(Master thesis / Masteroppgave, 2006)The aim of this study was to investigate to what extent population density and small scale habitat variability affect somatic growth of resident, stream-living brown trout Salmo trutta. There is an ongoing debate whether ...
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(Master thesis / Masteroppgave, 2007)Breeding habitat-choice in two closely related species of passerines, Great Tit (Parus major) and Blue Tit (Cyanistes caereleus) was studied to reveal if their habitat preferences primarily is a hereditary trait, or if ...
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(Master thesis / Masteroppgave, 2007)Understorey vegetation changes between 1997 and 2005 were studied using 100 permanent plots (1 m2) in four boreal spruce forest stands situated within a National Nature Reserve in SE Norway. The stands differed with respect ...
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(Master thesis / Masteroppgave, 2007)Great tit nestlings won’t thrive in nests of the pied flycatcher, even though the opposite has been proven successful. In order to explore some of the reasons why, we performed cross fostering experiments where great tit ...
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(Master thesis / Masteroppgave, 2007)The red deer (Cervus elaphus) are among the most important game species in Norway, with a tenfold increase in harvest over the last few decades. Despite its importance, information regarding red deer habitat selection is ...
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(Master thesis / Masteroppgave, 2007)1. Many studies have dealt with home range and migratory patterns of Cervid species, but there are few explicit analyses quantifying migratory patterns and home range size as a result of habitat. Red deer is known to perform ...
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(Master thesis / Masteroppgave, 2007)In my experiment I studied domestic chicks (Gallus gallus domesticus) to find out how different sounds and colours affect their behaviour in a feeding process. Previous studies have found the wasp’s buzzing to be a negatively ...
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(Master thesis / Masteroppgave, 2008)An upper Ordovician (upper Sandbian) benthic Paleozoic fauna at Langesund in the Oslo graben area has been reviewed. The study area consisted of the uppermost 13 meters of sediments in the Fossum Formation. A species/plot ...
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(Master thesis / Masteroppgave, 2008)I dette studiet undersøkte jeg overlevelsestrender hos elgkalver og voksne elgkuer på Koppang i Hedmark fylke, sør-øst i Norge. Ulv var tilstede i området det meste av studieperioden, men antall ulveflokker endret seg noe ...
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(Master thesis / Masteroppgave, 2008)Divergent selection pressures, induced by variations in environmental conditions, can be expected to favour different phenotypic expressions. Different populations show thus often local adaptations that could be attributed ...
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(Master thesis / Masteroppgave, 2008)The dramatic increase of the red deer (Cervus elaphus) harvest in Norway the recent decades have led to concerns of possible oversized populations, and negative density effects on animal life history traits have been ...