Now showing items 233-252 of 280

  • Evju, Marianne (Doctoral thesis / Doktoravhandling, 2009)
    Large herbivores such as sheep affect plants directly and indirectly through selective foraging, trampling, urination and defecation, thereby modifying intra- and interspecific interactions and altering resource availability ...
  • Králová, Tereza; Albrecht, Tomas; Bryja, Josef; Horák, David; Johnsen, Arild; Lifjeld, Jan Terje; Novotny, Marian; Sedlacek, Ondrej; Velova, Hana; Vinkler, Michal (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Positive selection acting on Toll‐like receptors (TLRs) has been recently investigated to reveal evolutionary mechanisms of host–pathogen molecular co‐adaptation. Much of this research, however, has focused mainly on the ...
  • Magnussen, Trude; Kjærandsen, Jostein; Johnsen, Arild; Søli, Geir Einar Ellefsen (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Only one species of the genus Allodia has been previously recorded from the Afrotropical region, Allodia (Brachycampta) flavorufa Matile, 1978. Six new species are described here, all representing the nominotypical subgenus, ...
  • Soininen, Eeva M; Ehrich, Dorothee; Lecomte, Nicolas; Yoccoz, Nigel Gilles; Tarroux, Arnaud; Berteaux, Dominique; Gauthier, Gilles; Gielly, Ludovic; Brochmann, Christian; Gussarova, Galina; Ims, Rolf Anker (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2014)
    Intraspecific competition for food is expected to increase the trophic niche width of consumers, defined here as their diet diversity, but this process has been little studied in herbivores. Population densities of small ...
  • Gustafsson, A. Lovisa S. (Doctoral thesis / Doktoravhandling, 2013)
    The main objectives of this thesis are to study patterns and processes of plant speciation in arctic and alpine diploid plants. Cryptic species are here referred to as morphologically similar individuals belonging to the ...
  • Lifjeld, Jan T; Anmarkrud, Jarl A; Calabuig, Pascual; Cooper, Joseph E J; Johannessen, Lars E; Johnsen, Arild; Kearns, Anna M; Lachlan, Robert F; Laskemoen, Terje; Marthinsen, Gunnhild; Stensrud, Even; Garcia-del-Rey, Eduardo (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    Background One of the biggest challenges in avian taxonomy is the delimitation of allopatric species because their reproductive incompatibility cannot be directly studied in the wild. Instead, reproductive ...
  • Støstad, Hanna Nyborg; Johnsen, Arild; Lifjeld, Jan Terje; Rowe, Melissah (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)
    Sperm exhibit extraordinary levels of morphological diversification across the animal kingdom. In songbirds, sperm have a helically shaped head incorporating a distinct acrosomal membrane or “helical keel,” the form and ...
  • Laskemoen, Terje (Doctoral thesis / Doktoravhandling, 2010)
    Sperm cells are the most variable animal cells, and a tremendous variation in sperm phenotypes exists among species, from minute amoeboid sperm to giant sperm in some species of fruit flies. Much effort has been devoted ...
  • Sætre, Camilla Lo Cascio; Johnsen, Arild; Stensrud, Even; Cramer, Emily Rebecca A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    Postcopulatory sexual selection may select for male primary sexual characteristics like sperm morphology and sperm motility, through sperm competition or cryptic female choice. However, how such characteristics influence ...
  • Cramer, Emily Rebecca A; Stensrud, Even; Marthinsen, Gunnhild; Hogner, Silje; Johannessen, Lars Erik; Laskemoen, Terje; Eybert, Marie-Christine; Slagsvold, Tore; Lifjeld, Jan Terje; Johnsen, Arild (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)
    Divergent sexual selection within allopatric populations may result in divergent sexual phenotypes, which can act as reproductive barriers between populations upon secondary contact. This hypothesis has been most tested ...
  • Omotoriogun, Taiwo Crossby; Albrecht, Tomas; Hořak, David; Laskemoen, Terje; Ottosson, Ulf; Rowe, Melissah; Sedlacek, Ondrej; Lifjeld, Jan Terje (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2016)
    Sperm morphology is highly diversified across the animal kingdom and recent comparative evidence from passerine birds suggests that postcopulatory sexual selection is a significant driver of sperm evolution. In the present ...
  • Hansen, Lars Ove; Berggren, Kai; Sørlibråten, Ove (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2010)
    The conspicuous icneumonid fly Stauropoctonus bombycivorus (Gravenhorst, 1829) is recorded for the first time in Norway. Four specimens have been captured in light-traps at three different localities in 2007: Hvaler in ...
  • Sjökvist, Elisabet; Pfeil, Bernard E.; Larsson, Ellen; Larsson, Karl-Henrik (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)
    One new order, one new family, and one new combination are presented, as the result of molecular phylogenetic analyses. The new order Stereopsidales and the new family Stereopsidaceae are described incorporating Stereopsis ...
  • Hansen, Bitten Bolvig; Hammer, Øyvind; Nakrem, Hans Arne (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    We report on a newly excavated Spathian (Lower Triassic) bonebed on Marmierfjellet, Central Spitsbergen. The bonebed contains a varied material of bones and teeth from marine vertebrates along with conodont elements. The ...
  • Liu, Hai-Ying (Doctoral thesis / Doktoravhandling, 2008)
    The principal aim of this study was to investigate vegetation-environment relationships and examine patterns of changes in forest understorey vegetation in five Chinese subtropical forests. Furthermore, an Ecological Field ...
  • Rowe, Melissah; Griffith, Simon C; Hofgaard, Antje; Lifjeld, Jan T (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2015)
    Background Evolutionary biology endeavours to explain biological diversity, and as such it is critical to develop an understanding of the adaptive and functional significance of trait variation. Spermatozoa ...
  • Marki, Petter Zahl; Jønsson, Knud A.; Irestedt, Martin; Nguyen, Jacqueline M.T.; Rahbek, Carsten; Fjeldså, Jon (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    With nearly 300 species, the infraorder Meliphagides represents one of the largest and most conspicuous Australasian bird radiations. Although the group has been the focus of a number of recent phylogenetic studies, a ...
  • Müller, Axel; Romer, Rolf L.; Pedersen, Rolf B. (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2017)
    The Late-Proterozoic Sveconorwegian pegmatite province in southern Norway and southwest Sweden hosts seven rare-element pegmatite districts with more than 5000 rare-element pegmatites. Most of these pegmatites with ...
  • Tusiime, Felly Mugizi; Gizaw, Abel; Wondimu, Tigist; Masao, Catherine; Abdi, Ahmed Abdikhadir; Muwanika, Vincent; Travnicek, Pavel; Nemomissa, Sileshi; Popp, Magnus; Eilu, Gerald; Brochmann, Christian; Pimentel, Manuel (Journal article / Tidsskriftartikkel / SubmittedVersion, 2017)
    High tropical mountains harbour remarkable and fragmented biodiversity thought to a large degree to have been shaped by multiple dispersals of cold-adapted lineages from remote areas. Few dated phylogenetic/phylogeographic ...
  • Aguado, Maria Teresa; Richter, Sandy; Sontowski, Rebekka; Golombek, Anja; Struck, Torsten Hugo; Bleidorn, Christoph (Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2016)
    Complete mitochondrial genomes of five syllids (Streptosyllis sp., Eusyllis blomstrandi, Myrianida brachycephala, Typosyllis antoni and Typosyllis sp.) have been obtained using Illumina sequencing. Together with two previous ...