Browsing Biologisk institutt by Title
Now showing items 66-85 of 118
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)Background Although some mechanisms of habitat adaptation of conspecific populations have been recently elucidated, the evolution of female preference has rarely been addressed as a force driving habitat ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)Understanding why some hybrid zones are bimodal and others unimodal can aid in identifying barriers to gene exchange following secondary contact. The hybrid zone between the grasshoppers Chorthippus brunneus and C. jacobsi ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)Harvesting wild populations may contrast or reinforce natural agents of selection and potentially cause evolutionary changes in life-history traits such as growth and maturation. Harvest selection may also act on behavioral ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background Dryas octopetala is a widespread dwarf shrub in alpine and arctic regions that forms ectomycorrhizal (ECM) symbiotic relationships with fungi. In this study we investigated ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background The mating type loci that govern the mating process in fungi are thought to be influenced by negative frequency-dependent selection due to rare allele advantage. In this study we used a mating ...
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(Master thesis / Masteroppgave, 2008)Marine trepigget stingsild (Gasterosteus aculeatus) har kolonisert ulike ferskvannshabitat gjentatte ganger og denne koloniseringen har ført til ulikheter innen trekk som morfologi, atferd, fysiologi og livshistorie. Disse ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2006)The polymeric Ig receptor (pIgR), also called membrane secretory component (SC), mediates epithelial transcytosis of polymeric immunoglobulins (pIgs). J Chain-containing polymeric IgA (pIgA) and pentameric IgM bind pIgR ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)The seasonal timing of avian reproduction is supposed primarily to coincide with favourable feeding conditions. Long-term changes in avian breeding phenology are thus mostly scrutinized in relation to climatic factors and ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)Recent multilocus studies of congeneric birds have shown a pattern of elevated interspecific divergence on the Z chromosome compared to the autosomes. In contrast, intraspecifically, birds exhibit less polymorphism on the ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)Background Effects of polyploidisation on gene flow between natural populations are little known. Central European diploid and tetraploid populations of Arabidopsis arenosa and A. lyrata are here used to ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background During the last 15 years the internal transcribed spacer (ITS) of nuclear DNA has been used as a target for analyzing fungal diversity in environmental samples, and has recently been selected as ...
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(Conference object / Konferansebidrag, 2010)
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(Doctoral thesis / Doktoravhandling, 2010)Rødkinnet spyflue (Calliphora vicina) er et alvorlig skadedyr i norsk tørrfiskproduksjon. I dårlige år forårsaker insektene et økonomisk tap som overskrider 10 millioner kroner. Problemene oppstår når fluene legger egg på ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)Background Calpains are Ca2+-dependent cysteine proteases that participate in a range of crucial cellular processes. Dysfunction of these enzymes may cause, for instance, life-threatening diseases in humans, ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)Background Pockmarks (depressions in the seabed) have been discovered throughout the world’s oceans and are often related to hydrocarbon seepage. Although high concentrations of pockmarks are present in ...
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(Master thesis / Hovedoppgave, 2007)Abstract In order to investigate the effect of different polluting agents to fungi, there is an obvious need for methods for estimating fungal growth. Given that the traditional methods are not accurate and efficient enough, ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
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(Journal article / Tidsskriftartikkel / PublishedVersion; 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 between ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)Background Human cases of plague (Yersinia pestis) infection originate, ultimately, in the bacterium's wildlife host populations. The epidemiological dynamics of the wildlife reservoir therefore determine ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)There is growing evidence that post-copulatory sexual selection, mediated by sperm competition, influences the evolution of sperm phenotypes. Evidence for pre-copulatory sexual selection effects on sperm traits, on the ...