Browsing Økologi og evolusjon by Title
Now showing items 2-18 of 18
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(Master thesis / Masteroppgave, 2012)Breeding systems for species with cryptic lives are difficult to examine in nature based on purely observational studies. In this study, a genetic approach was used to investigate the breeding system of a population of a ...
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(Master thesis / Masteroppgave, 2012)This study consists of two parts. In the first part, a method of measuring cranium size of great tits was developed, and in the second part cranium size was compared with measures of fitness, namely winter survival and ...
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Effects of mother condition on pregnancy and early losses of calves in semi-domesticated reindeerRestricted Access (Master thesis / Masteroppgave, 2011)A central issue in life history theory is the trade-off between current reproduction and future survival. As mammalian herbivores with long life prioritize survival above reproduction, especially under harsh conditions, ...
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(Master thesis / Masteroppgave, 2011)The independent evolution of different quantitative traits is often thought to require a modular structure of the genotype-phenotype map (GP map). In that context, pleiotropy is considered a constraint on adaptive evolution. ...
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(Master thesis / Masteroppgave, 2012)Large herbivores and their grazing impact is an important subject in ecology. It is well known that grazing shapes the structure, diversity and functioning of terrestrial ecosystems, but how the level of density dependence ...
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(Master thesis / Masteroppgave, 2012)Ticks are vectors for a number of infectious diseases, and an understanding of their ecology is valuable for minimising the risk of human and livestock infections. The aim of this study was to identify the previous hosts ...
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(Master thesis / Masteroppgave, 2011)Over the past decades the population of red deer, Cervus elaphus, along the south-west coast of Norway have increased 10 fold in density as evidenced from the harvest statistics. At the same time the abundance of Ixodes ...
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(Master thesis / Masteroppgave, 2011)A population of pied flycatchers was studied to examine learning of song syllables within a single breeding season. Males were separated into neighbor groups based on geographical location and access to experienced, potential ...
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(Master thesis / Masteroppgave, 2012)The lack of empirical knowledge on how marine reserves should be effectively designed has impeded their extensive implementation as fisheries management tools. While current knowledge is largely based on computer models, ...
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(Master thesis / Masteroppgave, 2011)Det har vært en økende interesse innenfor atferdsøkologien for å studere personlighet hos dyr. Tidligere studier som har undersøkt matsøk og aposematisme hos kyllinger(Gallus gallus domesticus) har vist store individuelle ...
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(Master thesis / Masteroppgave, 2012)Skin biopsies of bowhead whales (Balaena mysticetus) were sampled during the spring aggregation in Disko Bay, West Greenland, over a period of 13 years, and analyzed regarding gender and genetic diversity at the mitochondrial ...
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(Master thesis / Masteroppgave, 2012)
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The role of interspecific competition and hybridization in phenotipic evolution of Passer sparrows (Master thesis / Masteroppgave, 2012)Interactions between closely related species, including resource competition and hybridization, might influence phenotypic evolution and play a significant role in evolutionary diversification. There may be different ...
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(Master thesis / Masteroppgave, 2011)Norwegian alpine areas have for the past nine decades been subjected to an intensified use in terms of grazing by large domestic herbivores. It is thus essential to know how this affects alpine ecosystems. Grazing studies ...
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(Master thesis / Masteroppgave, 2012)Studies of size trends have increased in recent times. This work continues a growing number of studies of the Ordovician and the Ordovician-Silurian transition. The Ordovician is a period of Earth`s history with severe ...
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(Master thesis / Masteroppgave, 2012)Bryophytes are a dominant vegetation component of the boreal forest, and an important part of the ecosystem, yet little is known about the microbial community associated with them. The aims of this thesis were 1) to analyze ...
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(Master thesis / Masteroppgave, 2012)It is now commonly recognized that animals have different personalities and that these personalities are moderately heritable, repeatable, and may influence fitness components such as survival and reproduction. Much of ...