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(Master thesis / Masteroppgave, 2009)
This thesis concerns the effect of marine pollutants on marine mammals, whit special focus given Bergmans studies on the Baltic grey seal. Environmental pollutions have gained increasing attention the last few decades, and ...
(Master thesis / Masteroppgave, 2009)
(Master thesis / Masteroppgave, 2009)
I denne studien har jeg analysert forhold og faktorer som påvirker artsrikhet av flercellet zooplankton i innsjøer i Norge. Oppgaven består av to deler: den ene delen tar for seg mitt eget arbeid, som er prøvetaking for ...
A phylogeographic survey of a circumboreal polypore indicates introgression among ecologically differentiated lineages Restricted Access
(Master thesis / Masteroppgave, 2009)
Gloeoporus taxicola is a widespread saprotrophic polypore that occurs on a variety of coniferous substrates in the Northern Hemisphere. In this master thesis a multi-locus sequencing approach was used, on an extensive ...
(Master thesis / Masteroppgave, 2009)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
Background: Large multigene sequence alignments have over recent years been increasingly employed for phylogenomic reconstruction of the eukaryote tree of life. Such supermatrices of sequence data are preferred over single ...
(Doctoral thesis / Doktoravhandling, 2009)
Denne avhandlingen viser at fisk utsatt for lave nivåer av produsertvann over lang tid kan utvikle skader på arvematerialet, modnes senere og få redusert vekst. Produsertvann er et biprodukt fra utvinningen av olje og ...
(Master thesis / Masteroppgave, 2009)
I denne studien har vi evaluert og sammenlignet effektene av ulike nitro-polisykliske aromatiske hydrokarboner (nitro-PAH), som er mutagene og karsinogene forbindelser, og finnes på forurensningspartikler fra blant annet ...
(Master thesis / Masteroppgave, 2009)
(Master thesis / Masteroppgave, 2009)
Exposure to environmental toxicants is a contributing factor to health disorders such as cancer, asthma and allergy. A toxicant which has been studied more in depth the last years is the well known neurotoxicant acrylamide ...
(Master thesis / Masteroppgave, 2009)
(Master thesis / Masteroppgave, 2009)
Sammendrag
Unge menn fra Norge har lavere sædkvalitet og høyere forekomst av testikkelkreft enn for eksempel menn fra Finland. Disse funnene kan være et resultat av endringer i livsstil, kosthold eller miljø. Lavere ...
(Master thesis / Masteroppgave, 2009)
Sediment in Frierfjord, Southern Norway is polluted by heavy metals, PAH, PCB, dibenzo-p-dioxins and dibenzofurans. Levels of toxicity in sediment cannot be determined through chemical analyses alone due to biological, ...
(Master thesis / Masteroppgave, 2009)
Numerous studies have explored the effects of morphine on cognitive function, while knowledge concerning methadone is scarce. This study is the first in line, being part of a newly started project. The aim of this study ...
The fungal community associated with roots of alpine and arctic Dryas octopetala along a latitudinal gradient Restricted Access
(Master thesis / Masteroppgave, 2009)
The ectomycorrhizal (ECM) dwarf shrub Dryas octopetala is one of the hardiest and most abundant of all woody plant groups in alpine and arctic environments. The main aim of this study was to characterise the fungal communities ...
A study of the hybrid zone between house sparrow (Passer domesticus) and Italian sparrow (Passer italiae) based on plumage characters and microsatellites Restricted Access
(Master thesis / Masteroppgave, 2009)
(Master thesis / Masteroppgave, 2009)
Adenomatous polyposis coli (APC) genet er uttrykt i de fleste vev og koder for et stort tumor supressor protein med mange funksjoner. Mutasjoner i APC er en av de tidligste årsakene til utvikling av både den arvelige typen ...
(Master thesis / Masteroppgave, 2009)
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
Climate change and overfishing are increasingly causing unanticipated changes in marine ecosystems (e.g. shifts in species dominance). In order to understand and anticipate these changes, there is a crucial need for ...
(Master thesis / Masteroppgave, 2009)
Cyanobacteria produce a number of bioactive compounds, most of them are oligopeptides. Almost all are known from freshwater species. The aim of this study was to search for marine and brackish water species producing ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
Background
Cyanobacteria often produce several different oligopeptides, with unknown biological functions, by nonribosomal peptide synthetases (NRPS). Although some cyanobacterial NRPS gene cluster types ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
Background
To conduct phylogeographic or population genetic studies, an adequate number of DNA markers for the focal species are required. Due to severe unavailability of genotype markers of any kind for ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
Background
Genetic variation has been shown to play a significant role in determining susceptibility to the salmon louse, Lepeophtheirus salmonis. However, the mechanisms involved in differential response ...
(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 ...
(Doctoral thesis / Doktoravhandling, 2009)
The main objective of these studies was to utilize the large amount of co-occurring fauna and chemical data collected in different contamination zones around offshore installations to derive ecologically relevant protection ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2009)
Background
In order to understand the role of herbivores in trophic webs, it is essential to know what they feed on. Diet analysis is, however, a challenge in many small herbivores with a secretive life ...
(Doctoral thesis / Doktoravhandling, 2009)
Pockmarks have now been recognised for nearly four decades, and are one of the most obvious and abundant structural features of the seafloor in some areas, yet there is still little knowledge of their influence on fauna ...
(Master thesis / Masteroppgave, 2009)
(Master thesis / Masteroppgave, 2009)
Sammendrag
Denne oppgaven er basert på data samlet inn under AKES 1 toktet (Antarctic Krill and Ecosystem Studies), utført i regi av Havforskningsinstituttet (IMR: Institute for Marine Research, Norway) med forskningsfartøyet ...
(Master thesis / Masteroppgave, 2009)
Lesjoner på lever ble undersøkt i åtte sel innsamlet mellom april 2008 og september 2009 i Hvaler og Sandøy kommune.
Det var ikke noe spesielt med kondisjonen til selene som tilsa at dyrene hadde dårlig helse. ...
(Master thesis / Masteroppgave, 2009)
Choice of nesting site by tits: cultural transmission? Restricted Access
(Master thesis / Masteroppgave, 2009)
In many species of birds, the quality of the nest site may have important fitness consequences. The focus of the present study was to see if nest box choice in blue tits (Cyanistes caeruleus) and great tits (Parus major) ...
(Master thesis / Masteroppgave, 2009)
During the last 50 years several changes has occurred in the flora of Oslofjord region. The Crambe maritima populations in the Oslofjord region have increased in size and number, the Eryngium maritimum populations seem ...
(Master thesis / Masteroppgave, 2009)
The northern blue whiting is a small mesopelagic gadoid, widely distributed in the north‐east Atlantic. The fishery on this species is extensive and is of commercial importance for several states, also Norway. There have ...
(Master thesis / Masteroppgave, 2009)
Singing in the pied flycatcher, Ficedula hypoleuca, was examined in both intra- and intersexual contexts. Song responses to male intruders and prospecting females were investigated by introducing caged conspecific birds ...
(Master thesis / Masteroppgave, 2009)
Abstract
Previous studies have revealed increased levels of germline mutations in minisatellite DNA in populations of herring gulls and mice sampled in Hamilton Harbour, Ontario Canada, an industrial area with high emissions ...
(Master thesis / Masteroppgave, 2009)
Following colonization of new habitats and subsequent strong selection, adaptation to environmental conditions might be expected to be rapid. In a mountainous lake in Norway, Lesjaskogsvatnet, more than 20 distinct spawning ...
On the origin of an avian species by means of natural hybridization Restricted Access
(Master thesis / Masteroppgave, 2009)
Hybrid speciation has until recently been largely neglected by zoologists. This attitude is now changing. However, data is still scarce, and published examples include few taxa. In this thesis I present the first genetic ...
(Master thesis / Masteroppgave, 2009)
Abstract
The abundance and distribution of Antarctic krill is poorly known for some parts of the Southern Ocean. Recent, and anticipated enhanced interest in krill fisheries highlights the need for precise and reliable ...
(Master thesis / Masteroppgave, 2009)
ADHD (Attention-deficit hyperactivity disorder) kjennetegnes av manglende oppmerksomhet, impulsivitet og hyperaktivitet. Omlag 80% av forekomsten er genetisk betinget, mens de resterende 20% trolig skyldes miljømessige ...
(Master thesis / Masteroppgave, 2009)
Opiates have been used for centuries both as recreational drugs and for medical purposes. Opioids are substances that bind opioid receptors that are present throughout the nervous system. These receptors are the primary ...
Algevegetasjonen i ytre Isfjorden, Spitsbergen Et gjenbesøk 50 år etter Restricted Access
(Master thesis / Masteroppgave, 2009)
(Master thesis / Masteroppgave, 2009)
Ufrivillig barnløshet rammer mange par, og ikke velfungerende spermceller er en vanlig årsak. DNA-skader i spermceller kan føre til redusert mannlig fertilitet, og påvirke utvikling av et befruktet embryo. I denne ...
(Master thesis / Masteroppgave, 2009)
Variation in behavioral traits may be genetically or environmentally determined, or both. Previous studies on nest building behaviour in captive birds have proposed that nest building is mainly genetically determined. ...
(Master thesis / Masteroppgave, 2008)
Denne studien tok for seg den mesopelagiske maneten Periphylla periphylla, med hovedfokus på vertikalfordeling og døgnvandringsatferd, sett i forhold til fysiske faktorer, fordeling av potensielle fødeorganismer og ...
(Master thesis / Masteroppgave, 2008)
(Master thesis / Masteroppgave, 2008)
Photosystem II (PSII) inhibitors are ubiquitous in costal areas around the world. Changes in chlorophyll fluorescence have been seen in plants exposed to low concentrations of PSII inhibitors in laboratory experiments. Saw ...
(Master thesis / Masteroppgave, 2008)
Alzheimers sykdom, Parkinsons sykdom og hjerneslag er assosiert med nevrodegenerering i visse deler av hjernen. Overstimulering av glutamatreseptorer med medfølgende produksjon av frie radikaler har blitt foreslått å være ...
(Master thesis / Masteroppgave, 2008)
Sammendrag
Denne studien undersøker atferdsmønstre til Periphylla periphylla i Lurefjorden med fokus på maneter i nedre del av vannsøylen. Plassering av ekkolodd på fjordbunnen gjorde det mulig å studere svømmemønster, ...
(Master thesis / Masteroppgave, 2008)
Denne undersøkelsen ble utført som en del av et større tareskogsprosjekt hvis mål var å opparbeide kunnskap om biodiversitet og produksjon i tareskogsområder. Langs norskekysten domineres tareskogen av stortare Laminaria ...
(Master thesis / Masteroppgave, 2008)
Abstract
This study investigates four halogenated substances; three polyfluorinated compounds and one brominated substance. The polyfluorinated compounds, namely 6:2 fluorotelomer alcohol
(6:2 FTOH), 8:2 fluorotelomer ...
(Master thesis / Masteroppgave, 2008)
Oviraptorids are one of several groups of dinosaurs which have evolved beaks. Of extant beaked animals, birds and turtles are the best known. In this study, an anatomical comparison between oviraptorids, extant birds and ...
(Master thesis / Masteroppgave, 2008)
Disease in the male reproductive system seems to increase in industrialised countries. Examples are increasing rates of poor semen quality, and more cases of testicular cancer, - with Denmark and Norway having the World’s ...
(Master thesis / Masteroppgave, 2008)
Discharge from offshore activities to the sea may seriously affect the surrounding environment and cause disturbances in communities and ecosystems close to oil production installations. A major part of the waste released ...
(Master thesis / Masteroppgave, 2008)
Adaptation to different foraging resources is believed to be an important driving force of divergence between populations. Following colonization of freshwater, threespined sticklebacks (Gasterosteus aculeatus) have occupied ...
(Master thesis / Masteroppgave, 2008)
Sedimentet i mange norske fjorder er betydelig forurenset, hovedsaklig som følge av menneskelig aktivitet. På bakgrunn av høye verdier av miljøgifter, er det fastsatt kostholdsråd på konsum av lever fra torsk i indre ...
(Master thesis / Masteroppgave, 2008)
The control region (CR) of the mitochondrial DNA has been previously used to decipher the population structure of Holocene bowhead whales (Balaena mysticetus) from the Spitsbergen stock. The bone samples dated from recent ...
(Master thesis / Masteroppgave, 2008)
The MDM2 protein, a p53 inhibitor, is involved in cell cycle control and apoptosis. MDM2 may promote tumorigenesis when over expressed, amplified or mutated. The expression of MDM2 has been shown to be modified by some ...
(Master thesis / Masteroppgave, 2008)
Direkte stimulering av lukteorganet til mort (Rutilus rutilus) med flutamid, linuron, 17 α-ethynylestradiol, 4-nonylfenol og tributyltinnklorid (TBT) førte alle til målbare elektriske responser i form av elektro-olfaktogram ...
(Doctoral thesis / Doktoravhandling, 2008)
High nitrate (NO3) leaching rates have been observed in mountain and heathland areas in Europe at sites receiving high levels of nitrogen (N) deposition. These areas are characterised by sparse vegetation on thin, patchy ...
(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 ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2008)
Background
Cyanobacteria produce a wealth of secondary metabolites, including the group of small cyclic heptapeptide hepatotoxins that constitutes the microcystin family. The enzyme complex that directs the ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2008)
Background
Despite several thousands of years of close contacts, there are genetic differences between the neighbouring countries of Finland and Sweden. Within Finland, signs of an east-west duality have ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2008)
Background
Cyanopeptolins are nonribosomally produced heptapetides showing a highly variable composition. The cyanopeptolin synthetase operon has previously been investigated in three strains from the genera ...
(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2008)
Background
Identification of DNA sequence diversity is a powerful means for assessing the species present in environmental samples. The most common molecular strategies for estimating taxonomic composition ...
(Doctoral thesis / Doktoravhandling, 2008)
I dette arbeidet har vi utviklet molekylære metoder for simultant å måle forekomsten av ulike mikrober i komplekse samfunn. Koblet med økologisk analyse gir dette oss helt nye muligheter til å forstå hvordan bakteriesamfunn ...
(Doctoral thesis / Doktoravhandling, 2008)
This thesis investigates competition and ecological speciation by comparing habitat use, foraging ecology and physiology of two fish populations (Coregonus spp.) in a temperate lake. It demonstrates that dietary differences ...
(Doctoral thesis / Doktoravhandling, 2008)
Cyanobakterier (=blågrønnalger) forekommer i nesten alle norske innsjøer, og masseoppblomstringer av dem har vist seg å være utbredt over hele verden. Et stort problem ved oppblomstringer av cyanobakterier er giftstoffene ...
(Doctoral thesis / Doktoravhandling, 2008)
In most cases, the proliferation of marine planktonic alga is ecologically beneficial for the marine food web. However, harmful algal blooms can have negative effects by causing fish kills. In this PhD thesis particularly ...
(Doctoral thesis / Doktoravhandling, 2008)
In this thesis I report on several aspects of the reproductive ecology of the short-lived, monocarpic plant Digitalis purpurea L. (Plantaginaceae). Observational field studies are combined with controlled crosses and ...
(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 ...
(Master thesis / Masteroppgave, 2008)
A large number of round and elongated pockmarks were recently discovered in the Oslofjord, Norway. Pockmarks are formed by expulsion of fluid, most commonly methane or ground water. The elongated shape is a believed to be ...
(Doctoral thesis / Doktoravhandling, 2008)
Imagine if salmon snared on a hook or fish caught in a net were to scream and shout when they were extracted from the water. What would sports fishing and professional fishing have been like then? Would fish farming have ...
(Master thesis / Masteroppgave, 2008)
A new ecological scenario was established in the Oslofjord at beginning of this century, when alien macroalgal species like the invasive Japanese fucoid Sargassum muticum and the red algae Dasya baillouviana were observed ...
(Master thesis / Masteroppgave, 2008)
Forurensede sedimentmasser i indre Oslofjord blir fjernet ved mudring og deponert via rør til sjøbunnen i et dypvannsdeponi mellom Malmøykalven og Husbergøya. I denne oppgaven er biologiske og fysiske forhold i ...
(Master thesis / Masteroppgave, 2008)
Denne studien har fokusert på overvintring av brisling (Sprattus sprattus) i fire
forskjellige fjordarmer i indre Oslofjord under vinteren 2006/2007. Pelagisk tråling og
bunntråling samt ekkolodd ble brukt for å bestemme ...
(Master thesis / Masteroppgave, 2008)
Mauthner-cell initiated C-type startle responses were elicited in the fish hearing specialists zebrafish (Danio rerio), roach (Rutilus rutilus), sprat (Sprattus sprattus) and in the fish hearing generalist two-spotted goby ...
(Master thesis / Masteroppgave, 2008)
Flakavatn is probably Norway s largest high-alpine lake, situated in the remote Finse region, south central Norway. The unique character of the lake is a result of the long lasting annual freezing period, which affects ...
(Master thesis / Masteroppgave, 2008)
A challenge in ecotoxicology is the translation of individual-level effects of exposure, as measured in for instance laboratory tests, into population-level effects that have more ecological relevance. It is not necessarily ...
(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 ...
(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 ...
(Master thesis / Masteroppgave, 2008)
Many freshwater fishes are fragmented into local populations. Brown trout (Salmo trutta) is a fish that express high genetic heterogeneity and are known to be structured into genetically differentiated subpopulations ...
Microsatellite variation in two small and isolated populations of the endangered Ethiopian wolf (Canis simensis) Restricted Access
(Master thesis / Masteroppgave, 2008)
Summary
The genetic concerns in conservation biology arise from the deleterious effects of small population size, which is a consequence of loss of genetic diversity through genetic drift and inbreeding. The endangered ...
(Master thesis / Masteroppgave, 2008)
The nutritional stress hypothesis formulated by Nowicki et al. (1998) is based on the findings that brain structures underlying song learning in songbirds largely develop during the first few months post-hatching; a period ...
(Master thesis / Masteroppgave, 2008)
(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 ...
(Master thesis / Masteroppgave, 2008)
Many fish stocks today are declining due to the heavy harvesting and the increasingly demand for more food caused by the growing human population. Life-history trait as age and size at maturity are affected, the fish are ...
(Master thesis / Masteroppgave, 2008)
Summary
The anti-predatory behaviour displayed by female Great Tit (Parus major) and Blue Tit (Cyanistes caereleus) in the nestbox was studied to observe possible differences in response between the species, and also ...
(Master thesis / Masteroppgave, 2008)
The Semi-collared flycatcher (Ficedula semitorquata) is a member of the black-and-white flycatcher species complex. It is poorly studied, rare, and is currently classified as “near threatened”, in the IUCN red lists of ...
(Master thesis / Masteroppgave, 2008)
Dryas octopetala L. is an arctic-alpine plant that belongs to a genus where the number and delimitation of species are not fully resolved. The plant is unusual, compared with most other arctic-alpine plants in its diploid, ...
(Master thesis / Hovedoppgave, 2008)
A major concern related to production of oil from offshore installations is the discharge of produced water, which contains organic pollutants like PAHs (Polycyclic aromatic hydrocarbons) and APs (Alkylphenols) as well as ...
(Master thesis / Masteroppgave, 2008)
Epidemiologiske undersøkelser har funnet en sammenheng mellom eksponering for svevestøv i uteluft og utvikling eller forverring av kroniske lungesykdommer, astma, hjertekarsykdommer og kreft. Betennelsesreaksjoner i lungene ...
(Master thesis / Masteroppgave, 2008)
Separate gytedemer av harr har etablert seg over 20-25 generasjoner i Lesjaskogsvatn, Oppland fylke. Gytebekkene har konsistent ulike temperaturregimer. Nylige undersøkelser indikerer motgradient veksttilpasning i tidlige ...
(Master thesis / Masteroppgave, 2008)
The coastal cod is an important commercial and recreational resource for the local communities in the Skagerrak. The situation of this and neighbouring stocks has worsened for decades, promoting an imperative need for ...
(Master thesis / Masteroppgave, 2008)
Local diversity (alpha diversity) of macrobenthos in tropical, temperate and arctic soft-bottom regions was investigated. Macrobenthos are here defined as animals retained on a1mm sieve. Species abundance data from the ...
(Master thesis / Masteroppgave, 2007)
Polar cod (Boreogadus saida) were collected in two different fjords around Svalbard in 2006 to address their feeding ecology and growth. Kongsfjorden was sampled in spring and in autumn to investigate seasonal patterns. ...
(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, ...
(Master thesis / Masteroppgave, 2007)
ABSTRACT
Vertical distribution and trophic interactions of zooplankton and fish were studied
at a 150 m deep station in Bunnefjorden – the innermost part of the Oslofjord -
during winter 2005/2006. Focus was on the krill ...
(Master thesis / Hovedoppgave, 2007)
There is an increasing demand for knowledge of habitats, communities and distribution patterns of the seafloor for impact assessment, conservation and ecological studies. The European Union Water Framework directive will ...
(Master thesis / Hovedoppgave, 2007)
ABSTRACT
This study focuses on the mycogeography of 83 selected macrofungi in Norway. The fungi’s distribution patterns were related to a dataset of 81 environmental variables through GLM in order to reveal which factors ...