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Evidence for Mito-Nuclear and Sex-Linked Reproductive Barriers between the Hybrid Italian Sparrow and Its Parent Species 
Trier, Cassandra Nicole; Hermansen, Jo Skeie; Sætre, Glenn-Peter; Bailey, Richard Ian (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Studies of reproductive isolation between homoploid hybrid species and their parent species have rarely been carried out. Here we investigate reproductive barriers between a recently recognized hybrid bird species, the ...
Density-dependence in space and time: Opposite synchronous variations in population distribution and body condition in the baltic sea sprat (Sprattus sprattus) over three decades 
Casini, Michele; Rouyer, Tristan Alexander; Bartolino, Valerio; Larson, Niklas; Grygiel, Wlodzimierz (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
Spatio-temporal density-dependent processes are crucial regulatory factors for natural populations. However, there is a lack of studies addressing spatial density-dependence in fish growth. A previous investigation has ...
CMG-Biotools, a Free Workbench for Basic Comparative Microbial Genomics 
Vesth, Tammi; Lagesen, Karin; Acar, Öncel; Ussery, David (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
Background: Today, there are more than a hundred times as many sequenced prokaryotic genomes than were present in the year 2000. The economical sequencing of genomic DNA has facilitated a whole new approach to microbial ...
Climate Change and Genetic Structure of Leading Edge and Rear End Populations in a Northwards Shifting Marine Fish Species, the Corkwing Wrasse (Symphodus melops) 
Knutsen, Halvor; Jorde, Per Erik; Blanco Gonzalez, Enrique; Robalo, Joana I.; Albretsen, Jon; Almada, Vitor C. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2013)
One mechanism by which marine organisms may respond to climate shifts is range shifts. The corkwing wrasse (Symphodus melops) is a temperate fish species, inhabiting the coasts of Europe, that show strong indications of ...
A Migratory Northern Ungulate in the Pursuit of Spring: Jumping or Surfing the Green Wave? 
Bischof, Richard; Loe, Leif Egil; Meisingset, Erling L.; Zimmermann, Barbara; Van Moorter, Bram; Mysterud, Atle (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 ...
Metagenomic and geochemical characterization of pockmarked sediments overlaying the Troll petroleum reservoir in the North Sea 
Håvelsrud, Othilde E; Haverkamp, Thomas H; Kristensen, Tom; Jakobsen, Kjetill S; Rike, Anne G (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 ...
Factors affecting deer ked (Lipoptena cervi) prevalence and infestation intensity in moose (Alces alces) in Norway 
Madslien, Knut; Ytrehus, Bjørnar; Viljugrein, Hildegunn; Solberg, Erling J; Bråten, Kent R; Mysterud, Atle (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Background The deer ked (Lipoptena cervi), a hematophagous ectoparasite of Cervids, is currently spreading in Scandinavia. In Norway, keds are now invading the south-eastern part of the country and the ...
Massive expansion of the calpain gene family in unicellular eukaryotes 
Zhao, Sen; Liang, Zhe; Demko, Viktor; Wilson, Robert; Johansen, Wenche; Olsen, Odd-Arne; Shalchian-Tabrizi, Kamran (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, ...
Toxicity, autecology and DNA content in the marine flagellate Pseudochattonella (Dictyochophyceae, Heterokonta) 
Skjelbred, Birger (Doctoral thesis / Doktoravhandling, 2012)
Phytoplankton is main producers of marine pelagic food webs, acting as link between the energy source, the sun, and consumers. Phytoplankton is an evolutionary diverse group whick is, however, traditionally assembled due ...
Diversity and community composition of root-associated fungi explored by high throughput sequencing 
Blaalid, Rakel (Doctoral thesis / Doktoravhandling, 2012)
Interactions between plant roots and fungi are well known from most terrestrial ecosystems. Mycorrhizal association is the most prominent plant-fungi interaction, where the fungal partners increase the water and nutrient ...
A current absence of neonaticide in Norway 
Ottesen, Vibeke (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
The present study is the first attempt to explore the rate, characteristics and legal reactions to neonaticide in Norway during the years 1990 – 2009. Potential incidents of neonaticide were identified through the national ...
Field testing for toxic algae with a microarray: initial results from the MIDTAL project 
McCoy, Gary; Raine, Robin; Medlin, Linda K.; Chen, Jixin; Kooistra, Wiebe; Barra, Luciana; Ruggiero, MariaValeria; Graneli, Edna; Hagström, Johannes; Salomon, Paolo; Reguera, Beatrize; Rodriguez, Fernandes; Escalera, Laura; Edvardsen, Bente; Dittami, Simon; Eikrem, Wenche; Lewis, Jane; Berzano, Marco; Christopher, Elliott; Campbel, Katrina; Pazos, Yolanda (Chapter / Bokkapittel / PublishedVersion; Peer reviewed, 2012)
In: Pagou, P. and Hallegraeff, G. (eds). Proceedings of the 14th International Conference on Harmful Algae. International Society for the Study of Harmful Algae and Intergovernmental Oceanographic Commission of UNESCO 2012 ...
Annual cycle of Pseudo-nitzschia species in Outer Oslofjorden, Norway 
Hostyeva, Vladyslava; Eikrem, Wenche; Edvardsen, Bente; Hasle, Grethe Rytter (Chapter / Bokkapittel / PublishedVersion; Peer reviewed, 2012)
In: Pagou, P. and Hallegraeff, G. (eds). Proceedings of the 14th International Conference on Harmful Algae. International Society for the Study of Harmful Algae and Intergovernmental Oceanographic Commission of UNESCO ...
Prevalence of tick borne encephalitis virus in tick nymphs in relation to climatic factors on the southern coast of Norway 
Andreassen, Åshild Kristine; Jore, Solveig; Cuber, Piotr; Dudman, Susanne Gjeruldsen; Tengs, Torstein; Isaksen, Ketil; Hygen, Hans Olav; Viljugrein, Hildegunn; Ånestad, Gabriel; Ottesen, Preben; Vainio, Kirsti (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Background: Tick-borne encephalitis (TBE) is among the most important vector borne diseases of humans in Europe and is currently identified as a major health problem in many countries. TBE endemic zones have expanded over ...
Nuisance growth of Juncus bulbosus in lakes and rivers : experimental and observational studies 
Moe, Therese Fosholt (Doctoral thesis / Doktoravhandling, 2012)
Nuisance growth of the aquatic macrophyte Juncus bulbosus has been observed since the 1980s in an increasing number of rivers and lakes in northern Europe. What causes such massive growth is not well understood, however, ...
Harvest selection on Atlantic cod behavioral traits: implications for spatial management 
Olsen, Esben Moland; Heupel, Michelle R.; Simpfendorfer, Colin A.; Moland, Even (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 ...
Habitat Association and Seasonality in a Mosaic and Bimodal Hybrid Zone between Chorthippus brunneus and C. jacobsi (Orthoptera: Acrididae) 
Bailey, Richard Ian; Saldamando-Benjumea, Clara I.; Tatsuta, Haruki; Butlin, Roger K. (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 ...
When Naked Became Armored: An Eight-Gene Phylogeny Reveals Monophyletic Origin of Theca in Dinoflagellates 
Orr, Russell; Murray, Shauna A.; Stüken, Anke; Rhodes, Lesley; Jakobsen, Kjetill Sigurd (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
The dinoflagellates are a diverse lineage of microbial eukaryotes. Dinoflagellate monophyly and their position within the group Alveolata are well established. However, phylogenetic relationships between dinoflagellate ...
Alterations of microbiota in urine from women with interstitial cystitis 
Siddiqui, Huma; Lagesen, Karin; Nederbragt, Alexander J; Jeansson, Stig L; Jakobsen, Kjetill S (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Background Interstitial Cystitis (IC) is a chronic inflammatory condition of the bladder with unknown etiology. The aim of this study was to characterize the microbial community present in the urine from ...
Contemporary ocean warming and freshwater conditions are related to later sea age at maturity in Atlantic salmon spawning in Norwegian rivers 
Villar, Jaime Otero; Jensen, Arne Johan; L'abee-Lund, Jan Henning; Stenseth, Nils Christian; Storvik, Geir Olve; Vøllestad, Leif Asbjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Atlantic salmon populations are reported to be declining throughout its range, raising major management concerns. Variation in adult fish abundance may be due to variation in survival, growth, and timing of life history ...
Genome Fragmentation Is Not Confined to the Peridinin Plastid in Dinoflagellates 
Espelund, Mari; Minge, Marianne Aastebøl; Gabrielsen, Tove M; Nederbragt, Alexander Johan; Shalchian-Tabrizi, Kamran; Otis, Christian; Turmel, Monique; Lemieux, Claude; Jakobsen, Kjetill Sigurd (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
When plastids are transferred between eukaryote lineages through series of endosymbiosis, their environment changes dramatically. Comparison of dinoflagellate plastids that originated from different algal groups has revealed ...
No Evidence for Pre-Copulatory Sexual Selection on Sperm Length in a Passerine Bird 
Lifjeld, Jan Terje; Laskemoen, Terje; Kleven, Oddmund; Pedersen, Anne Tiril Myhre; Lampe, Helene M.; Rudolfsen, Geir; Schmoll, Tim; Slagsvold, Tore (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 ...
Spatial Structure and Climatic Adaptation in African Maize Revealed by Surveying SNP Diversity in Relation to Global Breeding and Landrace Panels 
Westengen, Ola Tveitereid; Berg, Paul Ragnar; Kent, Matthew Peter; Brysting, Anne Krag (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Background: Climate change threatens maize productivity in sub-Saharan Africa. To ensure food security, access to locally adapted genetic resources and varieties is an important adaptation measure. Most of the maize grown ...
Northern refugia and recent expansion in the North Sea: the case of the wrasse Symphodus melops (Linnaeus, 1758) 
Robalo, Joana I.; Castilho, Rita; Francisco, Sara M.; Almada, Frederico; Knutsen, Halvor; Jorde, Per Erik; Pereira, Ana M.; Almada, Vitor C. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Pleistocene climate changes have imposed extreme conditions to intertidal rocky marine communities, forcing many species to significant range shifts in their geographical distributions. Phylogeographic analyses based on ...
Risk map and spatial determinants of pancreas disease in the marine phase of Norwegian Atlantic salmon farming sites 
Tavornpanich, Saraya; Paul, Mathilde; Viljugrein, Hildegunn; Abrial, David; Jimenez, Daniel Delgado; Brun, Edgar (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2012)
Background: Outbreaks of pancreas disease (PD) greatly contribute to economic losses due to high mortality, control measures, interrupted production cycles, reduced feed conversion and flesh quality in the aquaculture ...
Increased divergence but reduced variation on the Z chromosome relative to autosomes in Ficedula flycatchers: differential introgression or the faster-Z effect? 
Hogner, Silje; Sæther, Stein Are; Borge, Thomas; Bruvik, Torbjørn; Johnsen, Arild; Sætre, Glenn-Peter (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 ...
Impact of Nesting Mortality on Avian Breeding Phenology: A Case Study on the Red-Backed Shrike (Lanius collurio) 
Husek, Jan; Weidinger, Karel; Adamik, Peter; Slagsvold, Tore (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 ...
The genome sequence of Atlantic cod reveals a unique immune system 
Star, Bastiaan; Nederbragt, Alexander Johan; Jentoft, Sissel; Grimholt, Unni; Malmstrøm, Martin; Gregers, Tone Fredsvik; Rounge, Trine Ballestad; Paulsen, Jonas; Solbakken, Monica Hongrø; Sharma, Animesh; Wetten, Ola Frang; Lanzén, Anders; Winer, Roger; Knight, James; Vogel, Jan-Hinnerk; Aken, Bronwen; Andersen, Øivind; Lagesen, Karin; Tooming-Klunderud, Ave; Edvardsen, Rolf; Kirubakaran, G. Tina; Espelund, Mari; Nepal, Chirag; Previti, A. Christopher; Karlsen, Bård Ove; Moum, Truls; Skage, Morten; Berg, Paul Ragnar; Gjøen, Tor; Kuhl, Heiner; Thorsen, Jim; Malde, Ketil; Reinhardt, Richard; Du, Lei; Johansen, Steinar Daae; Searle, Steve; Lien, Sigbjørn; Nilsen, Frank; Jonassen, Inge; Omholt, Stig W; Stenseth, Nils Christian; Jakobsen, Kjetill Sigurd (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Atlantic cod (Gadus morhua) is a large, cold-adapted teleost that sustains long-standing commercial fisheries and incipient aquaculture. Here we present the genome sequence of Atlantic cod, showing evidence for complex ...
Evolutionary history of Serpulaceae (Basidiomycota): molecular phylogeny, historical biogeography and evidence for a single transition of nutritional mode 
Skrede, Inger; Engh, Ingeborg B; Binder, Manfred; Carlsen, Tor; Kauserud, Håvard; Bendiksby, Mika (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background The fungal genus Serpula (Serpulaceae, Boletales) comprises several saprotrophic (brown rot) taxa, including the aggressive house-infecting dry rot fungus Serpula lacrymans. Recent phylogenetic ...
Microarray estimation of genomic inter-strain variability in the genus Ectocarpus (Phaeophyceae) 
Dittami, Simon M; Proux, Caroline; Rousvoal, Sylvie; Peters, Akira F; Cock, J M; Coppée, Jean-Yves; Boyen, Catherine; Tonon, Thierry (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
CLOTU: An online pipeline for processing and clustering of 454 amplicon reads into OTUs followed by taxonomic annotation 
Kumar, Surendra; Carlsen, Tor; Mevik, Bjørn-Helge; Enger, Pål; Blaalid, Rakel; Shalchian-Tabrizi, Kamran; Kauserud, Håvard (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background:The implementation of high throughput sequencing for exploring biodiversity poses high demands on bioinformatics applications for automated data processing. Here we introduce CLOTU, an online and open access ...
A metagenomic study of methanotrophic microorganisms in Coal Oil Point seep sediments 
Håvelsrud, Elise O; Haverkamp, Thomas H; Kristensen, Tom; Jakobsen, Kjetill S; Rike, Anne G (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background Methane oxidizing prokaryotes in marine sediments are believed to function as a methane filter reducing the oceanic contribution to the global methane emission. In the anoxic parts of the sediments, ...
Transport of Babesia venatorum-infected Ixodes ricinus to Norway by northward migrating passerine birds 
Hasle, Gunnar; Leinaas, Hans P; Røed, Knut H; Øines, Øivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background Bovine babesiosis is regarded as a limited health problem for Norwegian cows, and the incidence has decreased markedly since the 1930s. Rare cases of babesiosis in splenectomised humans from ...
Polymorphism, selection and tandem duplication of transferrin genes in Atlantic cod (Gadus morhua) - Conserved synteny between fish monolobal and tetrapod bilobal transferrin loci 
Andersen, Øivind; De Rosa, Maria C; Pirolli, Davide; Tooming-Klunderud, Ave; Petersen, Petra E; André, Carl (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background The two homologous iron-binding lobes of transferrins are thought to have evolved by gene duplication of an ancestral monolobal form, but any conserved synteny between bilobal and monolobal ...
Contemporary divergence in early life history in grayling (Thymallus thymallus) 
Thomassen, Gaute; Barson, Nicola J; Haugen, Thrond O; Vøllestad, L A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background Following colonization of new habitats and subsequent selection, adaptation to environmental conditions might be expected to be rapid. In a mountain lake in Norway, Lesjaskogsvatnet, more than ...
Interspecific and interploidal gene flow in Central European Arabidopsis (Brassicaceae) 
Jørgensen, Marte H; Ehrich, Dorothee; Schmickl, Roswitha; Koch, Marcus A; Brysting, Anne K (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 ...
Assessing diversity of the female urine microbiota by high throughput sequencing of 16S rDNA amplicons 
Siddiqui, Huma; Nederbragt, Alexander J; Lagesen, Karin; Jeansson, Stig L; Jakobsen, Kjetill S (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background Urine within the urinary tract is commonly regarded as "sterile" in cultivation terms. Here, we present a comprehensive in-depth study of bacterial 16S rDNA sequences associated with urine from ...
Validation of reference genes for quantitative RT-qPCR studies of gene expression in Atlantic cod (Gadus morhua l.) during temperature stress 
Aursnes, Ingrid A; Rishovd, Anne L; Karlsen, Hans E; Gjøen, Tor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background One important physiological response to environmental stress in animals is change in gene expression. To obtain reliable data from gene expression studies using RT-qPCR it is important to evaluate ...
Enhanced transfection of cell lines from Atlantic salmon through nucoleofection and antibiotic selection 
Schiøtz, Berit L; Rosado, Esther G; Baekkevold, Espen S; Lukacs, Morten; Mjaaland, Siri; Sindre, Hilde; Grimholt, Unni; Gjøen, Tor (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2011)
Background Cell lines from Atlantic salmon kidney have made it possible to culture and study infectious salmon anemia virus (ISAV), an aquatic orthomyxovirus affecting farmed Atlantic salmon. However, ...
Conspecific Community Dynamics Models and their applications 
Sadykov, Alexander (Doctoral thesis / Doktoravhandling, 2011)
The thesis introduces a new integrated approach to ecological and evolutionary modeling, the goal of which is to create an analytical platform for applied interdisciplinary researches. This Conspecific Community Dynamics ...
Biotransformation of benzo[a]pyrene : analysis, metabolism and adduct formation in rats and Ahr knockout mice 
Sagredo, Carlos (Doctoral thesis / Doktoravhandling, 2011)
Spatio-temporal population structuring in complex environments: insights from the European grayling (Thymallus thymallus) 
Junge, Claudia (Doctoral thesis / Doktoravhandling, 2011)
Song learning in oscine songbirds : Tutor choice, timing, and the relationship with sexual imprinting 
Eriksen, Ane (Doctoral thesis / Doktoravhandling, 2011)
Birdsong is a species-specific signal that is used in mate attraction and intrasexual competition. This thesis concerns song acquisition in two oscine songbird species, the great tit Parus major and the pied flycatcher ...
Anthrax: Evolutionary approaches for genetic-based investigative tools 
Easterday, W. Ryan (Doctoral thesis / Doktoravhandling, 2011)
A poly approach to ploidy : polyploid evolution and taxonomic implications 
Jørgensen, Marte Holten (Doctoral thesis / Doktoravhandling, 2011)
Polyploidy, i.e., the duplication of entire nuclear genomes, has shaped the evolution of major lineages of eukaryotes, and is particularly important in the Plant Kingdom. Molecular analyses suggest that the genomes of most ...
Limnology in Winter - The Concept, Its Consequences and Challenges 
Klaveness, Dag (Conference object / Konferansebidrag, 2010)
Delayed density-dependent onset of spring reproduction in a fluctuating population of field voles 
Ergon, Torbjørn; Ergon, Rolf; Begon, Mike; Telfer, Sandra; Lambin, Xavier (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Delayed density-dependent demographic processes are thought to be the basis for multi-annual cyclic fluctuations in small rodent populations, but evidence for delayed density dependence of a particular demographic trait ...
Mass trapping of the blowfly Calliphora vicina Diptera Calliphoridae in Norwegian stockfish production areas : lure development, damage reduction, and pest species phenology 
Aak, Anders (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 ...
Patterns and mechanisms of seabird-environment interactions in southern Africa : population and individual studies 
Sabarros, Philippe Sunil (Doctoral thesis / Doktoravhandling, 2010)
The interactions between seabirds and their environment, notably their prey, include complex spatial patterns and mechanisms that span over different scales of processes (e.g. physiology, behaviour, population). To understand ...
Competition on the Rocks: Community Growth and Tessellation 
Jettestuen, Espen; Nermoen, Anders; Hestmark, Geir; Timdal, Einar; Mathiesen, Joachim (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Crustose lichen communities on rocks exhibit fascinating spatial mosaics resembling political maps of nations or municipalities. Although the establishment and development of biological populations are important themes in ...
Comprehensive analysis of MHC class I genes from the U-, S-, and Z-lineages in Atlantic salmon 
Lukacs, Morten F; Harstad, Håvard; Bakke, Hege G; Beetz-Sargent, Marianne; McKinnel, Linda; Lubieniecki, Krzysztof P; Koop, Ben F; Grimholt, Unni (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background We have previously sequenced more than 500 kb of the duplicated MHC class I regions in Atlantic salmon. In the IA region we identified the loci for the MHC class I gene Sasa-UBA in addition to a ...
Modeling the epidemiological history of plague in Central Asia: Palaeoclimatic forcing on a disease system over the past millennium 
Kausrud, Linné K; Begon, Mike; Ari, Tamara B; Viljugrein, Hildegunn; Esper, Jan; Büntgen, Ulf; Leirs, Herwig; Junge, Claudia; Yang, Bao; Yang, Meixue; Xu, Lei; Stenseth, Nils C (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 ...
A novel totivirus and piscine reovirus (PRV) in Atlantic salmon (Salmo salar) with cardiomyopathy syndrome (CMS) 
Løvoll, Marie; Wiik-Nielsen, Jannicke; Grove, Søren; Wiik-Nielsen, Christer R; Kristoffersen, Anja B; Faller, Randi; Poppe, Trygve; Jung, Joonil; Pedamallu, Chandra S; Nederbragt, Alexander J; Meyerson, Matthew; Rimstad, Espen; Tengs, Torstein (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background Cardiomyopathy syndrome (CMS) is a severe disease affecting large farmed Atlantic salmon. Mortality often appears without prior clinical signs, typically shortly prior to slaughter. We recently ...
The evolutionary history of the Arabidopsis lyrata complex: a hybrid in the amphi-Beringian area closes a large distribution gap and builds up a genetic barrier 
Schmickl, Roswitha; Jørgensen, Marte H; Brysting, Anne K; Koch, Marcus A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background The genomes of higher plants are, on the majority, polyploid, and hybridisation is more frequent in plants than in animals. Both polyploidisation and hybridisation contribute to increased ...
Detection of Babesia divergens in southern Norway by using an immunofluorescence antibody test in cow sera 
Hasle, Gunnar; Bjune, Gunnar A; Christensson, Dan; Røed, Knut H; Whist, Anne C; Leinaas, Hans P (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background The incidence of bovine babesiosis, caused by Babesia divergens (Apicomplexa: Piroplasmida) has decreased markedly since the 1930 s, but may re-emerge as a consequence of climate change and ...
A phylogenetic mosaic plastid proteome and unusual plastid-targeting signals in the green-colored dinoflagellate Lepidodinium chlorophorum 
Minge, Marianne A; Shalchian-Tabrizi, Kamran; Tørresen, Ole K; Takishita, Kiyotaka; Probert, Ian; Inagaki, Yuji; Klaveness, Dag; Jakobsen, Kjetill S (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background Plastid replacements through secondary endosymbioses include massive transfer of genes from the endosymbiont to the host nucleus and require a new targeting system to enable transport of the ...
Evolution of plant RNA polymerase IV/V genes: evidence of subneofunctionalization of duplicated NRPD2/NRPE2-like paralogs in Viola (Violaceae) 
Marcussen, Thomas; Oxelman, Bengt; Skog, Anna; Jakobsen, Kjetill S (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background DNA-dependent RNA polymerase IV and V (Pol IV and V) are multi-subunit enzymes occurring in plants. The origin of Pol V, specific to angiosperms, from Pol IV, which is present in all land plants, ...
Contemporary temperature-driven divergence in a Nordic freshwater fish under conditions commonly thought to hinder adaptation 
Kavanagh, Kathryn D; Haugen, Thrond O; Gregersen, Finn; Jernvall, Jukka; Vøllestad, L A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background Evaluating the limits of adaptation to temperature is important given the IPCC-predicted rise in global temperatures. The rate and scope of evolutionary adaptation can be limited by low genetic ...
High diversity of root associated fungi in both alpine and arctic Dryas octopetala 
Bjorbækmo, Frederikke M M; Carlsen, Tor; Brysting, Anne; Vrålstad, Trude; Høiland, Klaus; Inne Ugland, Karl; Geml, Jozsef; Schumacher, Trond; Kauserud, Håvard (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 ...
Telonemia-specific environmental 18S rDNA PCR reveals unknown diversity and multiple marine-freshwater colonizations 
Bråte, Jon; Klaveness, Dag; Rygh, Tellef; Jakobsen, Kjetill S; Shalchian-Tabrizi, Kamran (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background Recent surveys of eukaryote 18S rDNA diversity in marine habitats have uncovered worldwide distribution of the heterotrophic eukaryote phylum Telonemia. Here we investigate the diversity and ...
The ecological and evolutionary effects of harvesting Northeast Arctic cod - Insights from economics and implications for management 
Eikeset, Anne Maria (Doctoral thesis / Doktoravhandling, 2010)
Genomic organization and gene expression of the multiple globins in Atlantic cod: conservation of globin-flanking genes in chordates infers the origin of the vertebrate globin clusters 
Wetten, Ola F; Nederbragt, Alexander J; Wilson, Robert C; Jakobsen, Kjetill S; Edvardsen, Rolf B; Andersen, Øivind (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
Background The vertebrate globin genes encoding the α- and β-subunits of the tetrameric hemoglobins are clustered at two unlinked loci. The highly conserved linear order of the genes flanking the hemoglobins ...
ITS as an environmental DNA barcode for fungi: an in silico approach reveals potential PCR biases 
Bellemain, Eva; Carlsen, Tor; Brochmann, Christian; Coissac, Eric; Taberlet, Pierre; Kauserud, Håvard (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 ...
High variability in a mating type linked region in the dry rot fungus Serpula lacrymans caused by frequency-dependent selection? 
Engh, Bjorvand I; Skrede, Inger; Sætre, Glenn-Peter; Kauserud, Håvard (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 ...
Evolution of the dry rot fungus Serpula lacrymans and its allies 
Engh, Ingeborg Bjorvand (Doctoral thesis / Doktoravhandling, 2010)
This thesis focuses on the natural history of the dry rot fungus Serpula lacrymans and closely related taxa within Serpulaceae. In the first study the phylogenetic relationships within Serpulaceae have been investigated ...
Connectivity mechanisms in a population complex of coastal cod 
Espeland, Sigurd Heiberg (Doctoral thesis / Doktoravhandling, 2010)
In this thesis I have studied connectivity processes affecting the population structure of coastal cod on the Norwegian Skagerrak coast. I have focused on three aspects of the processes. Firstly the dynamics and the integrity ...
Catchments, Carbon, and Climate Connections : a Limnological Perspective 
Larsen, Søren (Doctoral thesis / Doktoravhandling, 2010)
Klimaforandringer gir drastiske endringer i mengden av organisk karbon i innsjøer og vi imøtegår en fremtid med brunere vann. Det er en av konklusjonene til Søren Larsens doktorgradsavhandling som er utført ved Biologisk ...
AIR: A batch-oriented web program package for construction of supermatrices ready for phylogenomic analyses 
Kumar, Surendra; Skjæveland, Åsmund; Orr, Russell; Enger, Pål; Ruden, Torgeir Andersen; Mevik, Bjørn-Helge; Burki, Fabien; Botnen, Andreas Valeur; Shalchian-Tabrizi, Kamran (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 ...
Effects from offshore oil production: chronic exposure of fish to produced water 
Holth, Tor Fredrik (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 ...
Ecology and geology of pockmarks 
Webb, Karen Elizabeth (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 ...
Genetic dissection of MHC-associated susceptibility to Lepeophtheirus salmonis in Atlantic salmon 
Gharbi, Karim; Glover, Kevin A; Stone, Louise C; MacDonald, Elizabeth S; Matthews, Louise; Grimholt, Unni; Stear, Michael J (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 ...
Analysing diet of small herbivores: the efficiency of DNA barcoding coupled with high-throughput pyrosequencing for deciphering the composition of complex plant mixtures 
Soininen, Eeva M; Valentini, Alice; Coissac, Eric; Miquel, Christian; Gielly, Ludovic; Brochmann, Christian; Brysting, Anne K; Sønstebø, Jørn H; Ims, Rolf A; Yoccoz, Nigel G; Taberlet, Pierre (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 ...
Environmental effects of oil and gas exploration on the benthic fauna of the Norwegian Continental Shelf : An analysis using the OLF-database 
Bjørgesæter, Anders (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 ...
Pros and cons of using seabirds as ecological indicators 
Durant, Joel Marcel; Hjermann, Dag Øystein; Frederiksen, Morten; Charrassin, Jean-Benoît; Le Maho, Yvon; Sabarros, Philippe Sunill; Crawford, RJM; Stenseth, Nils Christian (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 ...
A genome-wide analysis of nonribosomal peptide synthetase gene clusters and their peptides in a Planktothrix rubescens strain 
Rounge, Trine B; Rohrlack, Thomas; Nederbragt, Alexander J; Kristensen, Tom; Jakobsen, Kjetill S (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 ...
Cross-species amplification of 36 cyprinid microsatellite loci in Phoxinus phoxinus (L.) and Scardinius erythrophthalmus (L.) 
Holmen, Johannes; Vøllestad, Leif A; Jakobsen, Kjetill S; Primmer, Craig R (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 ...
Habitat adaptation rather than genetic distance correlates with female preference in fire salamanders (Salamandra salamandra) 
Caspers, Barbara A; Junge, Claudia; Weitere, Markus; Steinfartz, Sebastian (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 ...
17-alfa-østradiol nedregulerer gamma-glutamylcystein syntetase promotor i serumdepriverte PC-12 celler 
Øverby, Gunn Rebecca (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 ...
The future impact of nitrogen in the acidification of surface waters : Modelling, empirical and experimental studies of changes in nitrogen leaching 
Sjøeng, Anne Merete Smelhus (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 ...
Blocking primers to enhance PCR amplification of rare sequences in mixed samples – a case study on prey DNA in Antarctic krill stomachs 
Vestheim, Hege; Jarman, Simon N (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 ...
Evidence for positive selection acting on microcystin synthetase adenylation domains in three cyanobacterial genera 
Tooming-Klunderud, Ave; Fewer, David P; Rohrlack, Thomas; Jokela, Jouni; Rouhiainen, Leo; Sivonen, Kaarina; Kristensen, Tom; Jakobsen, Kjetill S (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 ...
Population substructure in Finland and Sweden revealed by the use of spatial coordinates and a small number of unlinked autosomal SNPs 
Hannelius, Ulf; Salmela, Elina; Lappalainen, Tuuli; Guillot, Gilles; Lindgren, Cecilia M; von Döbeln, Ulrika; Lahermo, Päivi; Kere, Juha (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 ...
Recombination and selectional forces in cyanopeptolin NRPS operons from highly similar, but geographically remote Planktothrix strains 
Rounge, Trine B; Rohrlack, Thomas; Kristensen, Tom; Jakobsen, Kjetill S (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 ...
Hunnenes partnervalg basert på visuelle stimuli hos trepigget stingsild (Gasterosteus aculeatus) 
Kristensen, Evelyn Kamila (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 ...
Values behind biodiversity and moral duties : development of a conceptual model for ethical environmental accounting using salmon farming as a case study 
Haugen, Arne Sveinson (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 ...
Ecology of a sympatric pair of coregonid fish : species interactions and temperature 
Helland, Ingeborg P. (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 ...
Dynamics of freshwater cyanobacteria and their bioactive oligopeptides : - role of abiotic environmental factors and population structure 
Halstvedt, Camilla Blikstad (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 ...
Ecology of gut bacteria : Microbial community dynamics investigated using an integrated approach 
Trosvik, Pål (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 ...
Genetic characterization of the marine ichthyotoxic flagellate Pseudochattonella farcimen (Heterokonta) and phylogenetic relationships among heterokonts. 
Riisberg, Ingvild (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 ...
Pollination ecology of Digitalis purpurea : Patterns and processes 
Grindeland, John Magne (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 ...
Metoder for registrering av toksisk relatert vekstendring hos soppmycel : Tungmetallpåvirkning på aksenisk mycel av Lepista multiforme 
Dybdahl, Hans Gotfred (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, ...
Patterns, causes and consequences of tooth wear in cervids 
Veiberg, Vebjørn (Doctoral thesis / Doktoravhandling, 2007)
Foraging ecology and environmental conditions have represented important driving forces in the evolution of both dental morphology as well as the digestive system. Teeth are essential for digestive processes in ruminants, ...
Plant Diversity in Western Ethiopia : Ecology, Ethnobotany and Conservation 
Awas, Tesfaye (Doctoral thesis / Doktoravhandling, 2007)
The aim of this thesis is to investigate the ecology and ethnobotany of vegetation in Benishangul Gumuz Regional State (BGRS), western Ethiopia. The studies reported in this thesis have confirmed the existence of 1102 ...
Ringer i vann : Fleksibel læring -- Kvalitetsreformen i praksis 
Ellingsrud, Geir; Bach-Gansmo, Edvin; Koch, Susanne Kjekshus; Herrestad, Henning; Andreassen, Ingvild Solberg; Mikalsen, Stig; Hjorth-Jensen, Morten; Hveberg, Klara; Langtangen, Hans Petter; Mørken, Knut; Vistnes, Arnt Inge; Haraldsen, Kirsten Borse; Karlsen, Hans Erik; Lindblad, Irene; Ebeling, Signe Oksefjell; Solhaug, Trond; Eifring, Halvor; Wilberg, Anette; Guttulsrud, Jan; Collins, Andrew; Ursin, Giske; Langleite, Torgrim; Nilsson, Kåre; Wlodek, Marcin; Engen, Bård Ketil (Book / Bok / PublishedVersion, 2007)
I artikkelsamlingen kan du lese om pedagogiske endringer i krysningspunktet mellom teknologi, organisering og læring. Du finner artikler fra en rekke ulike fagmiljøer som beskriver prosjekter av mange ulike slag. Erfaringene ...
Climate and the match or mismatch between predator requirements and resource availability 
Durant, Joël M.; Hjermann, Dag Ø.; Ottersen, Geir; Stenseth, Nils Chr. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2007)
Climate influences a population through a variety of processes, including reproduction, growth, migration patterns and phenology. Climate may operate either directly through metabolic and reproductive processes or indirectly ...
Phenotypic evolution from genetic polymorphisms in a radial network architecture 
Le Rouzic, Arnaud; Siegel, Paul B; Carlborg, Örjan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2007)
Background The genetic architecture of a quantitative trait influences the phenotypic response to natural or artificial selection. One of the main objectives of genetic mapping studies is to identify the ...
An expressed sequence tag (EST) library from developing fruits of an Hawaiian endemic mint (Stenogyne rugosa, Lamiaceae): characterization and microsatellite markers 
Lindqvist, Charlotte; Scheen, Anne-Cathrine; Yoo, Mi-Jeong; Grey, Paris; Oppenheimer, David G; Leebens-Mack, James H; Soltis, Douglas E; Soltis, Pamela S; Albert, Victor A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2006)
Background The endemic Hawaiian mints represent a major island radiation that likely originated from hybridization between two North American polyploid lineages. In contrast with the extensive morphological ...
Identification of a polymeric Ig receptor binding phage-displayed peptide that exploits epithelial transcytosis without dimeric IgA competition 
Braathen, Ranveig; Sandvik, Anders; Berntzen, Gøril; Hammerschmidt, S; Fleckenstein, Burkhard; Sandlie, Inger; Brandtzæg, Per; Johansen, Finn Eirik; Lauvrak, Vigdis (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 ...
Detection of reactive oxygen/nitrogen species and determination of cellular effects in rainbow trout (Oncorhynchus mykiss) hepatocytes 
Hegseth, Marit Nøst (Master thesis / Hovedoppgave, 2005)
ABSTRACT Cell-based assays are useful and effective for biomonitoring and toxicity screening purposes, and there is a need for fast, routine and simple screening assays. An assay to detect the production of reactive oxygen ...
Ogg1-defekte mus som modell for genotoksisitet i mannens kjønnsceller 
Håland, Julie Tesdal (Master thesis / Hovedoppgave, 2005)
SAMMENDRAG Celler er kontinuerlig utsatt for påvirkninger som kan skade dets DNA. Dette inkluderer oksidative DNA-skader, som oppstår via normal oksidativ metabolisme, og fra forbindelser i miljøet. Slike DNA-skader kan ...
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