Now showing items 821-840 of 1886

    • Habitat variability and faunal zonation at the Ægir Ridge, a canyon-like structure in the deep Norwegian Sea 

      Brix, Saskia; Kaiser, Stephanie M.; Lörz, Anne-Nina; Le Saout, Morgane; Schumacher, Mia; Bonk, Frederic; Egilsdottir, Hrönn; Hilma Ólafsdóttir, Steinunn; Tandberg, Anne Helene Solberg; Taylor, James; Tewes, Simon; Xavier, Joana R; Linse, Katrin (Journal article; Peer reviewed, 2022)
      The Ægir Ridge System (ARS) is an ancient extinct spreading axis in the Nordic seas extending from the upper slope east of Iceland (∼550 m depth), as part of its Exclusive Economic Zone (EEZ), to a depth of ∼3,800 m in the ...
    • Habitatkrav og diversitet hos vedlevende biller på dødved av lind (Tilia cordata) i Norge 

      Tellnes, Sylvelin Bratlid (Master thesis, 2015-07-01)
      Dødved er et viktig habitat for artsmangfoldet i skog. Dette artsmangfoldet gjør en viktig økosystemtjeneste som nedbrytere og resirkulerer næringsstoffer i skogøkosystemet. Biller (Coleoptera) utgjør en stor andel av dette ...
    • Half a century of genetic interaction between farmed and wild Atlantic salmon: Status of knowledge and unanswered questions 

      Glover, Kevin; Solberg, Monica Favnebøe; McGinnity, Phil; Hindar, Kjetil; Verspoor, Eric; Coulson, Mark W.; Hansen, Michael Möller; Araki, Hitoshi; Skaala, Øystein; Svåsand, Terje (Peer reviewed; Journal article, 2017)
      Atlantic salmon (Salmo salar) is one of the best researched fishes, and its aquaculture plays a global role in the blue revolution. However, since the 1970s, tens of millions of farmed salmon have escaped into the wild. ...
    • The handbook for standardized field and laboratory measurements in terrestrial climate change experiments and observational studies (ClimEx) 

      Halbritter Rechsteiner, Aud Helen; De Boeck, Hans J.; Eycott, Amy Elizabeth; Reinsch, Sabine; Robinson, David A.; Vicca, Sara; Berauer, Bernd; Christiansen, Casper Tai; Estiarte, Marc; Grünzweig, José M.; Gya, Ragnhild; Hansen, Karin; Jentsch, Anke; Lee, Hanna; Linder, Sune; Marshall, John; Peñuelas, Josep; Schmidt, Inger Kappel; Stuart-Haëntjens, Ellen; Wilfahrt, Peter; Vandvik, Vigdis; Abrantes, Nelson; Almagro, María; Althuizen, Inge; Barrio, Isabel C.; te Beest, Mariska; Beier, Claus; Beil, Iilka; Berry, Z. Carter; Birkemoe, Tone; Bjerke, Jarle W.; Blonder, Benjamin; Blume-Werry, Gesche; Bohrer, Gil; Campos, Isabel; Cernusak, Lucas S.; Chojnicki, Bogdan H.; Cosby, Bernhard J.; Dickman, Lee T.; Djukic, Ika; Filella, Iolanda; Fuchslueger, Lucia; Gargallo-Garriga, Albert; Gillespie, Mark Andrew; Goldsmith, Gregory R.; Gough, Christopher; Halliday, Fletcher W.; Hegland, Stein Joar; Hoch, Gunter; Holub, Petr; Jaroszynska, Francesca Orinda Holl; Johnson, Daniel M.; Jones, Scott B.; Kardol, Paul; Keizer, Jan J.; Klem, Karel; Konestabo, Heidi Sjursen; Kreyling, Jürgen; Kröel-Dulay, György; Landhäusser, Simon M.; Larsen, Klaus S.; Leblans, Niki; Lebron, Inma; Lehmann, Marco M.; Lembrechts, Jonas J.; Lenz, Armando; Linstädter, Anja; Llusià, Joan; Macias-Fauria, Marc; Malyshev, Andrey V.; Mänd, Pille; Marshall, Miles; Matheny, Ashley M.; McDowell, Nate; Meier, Ina C.; Meinzer, Frederick C.; Michaletz, Sean T.; Miller, Megan L.; Muffler, Lena; Oravec, Michal; Ostonen, Ivika; Porcar-Castell, Albert; Preece, Catherine; Prentice, Iain C.; Radujković, Dajana; Ravolainen, Virve; Ribbons, Relena; Ruppert, Jan C.; Sack, Lawren; Sardans, Jordi; Schindlbacher, Andreas; Scoffoni, Christine; Sigurdsson, Bjarni D.; Smart, Simon M; Smith, Stuart; Soper, Fiona; Speed, James David Mervyn; Sverdrup-Thygeson, Anne; Sydenham, Markus A. K.; Taghizadeh-Toosi, Arezoo; Telford, Richard J.; Tielborger, Katja; Töpper, Joachim Paul; Urban, Otmar; van der Ploeg, Martine; Van Langenhove, Leandro; Večeřová, Kristýna; Ven, Arne; Verbruggen, Erik; Vik, Unni; Weigel, Robert; Wohlgemuth, Thomas; Wood, Lauren K.; Zinnert, Julie; Zurba, Kamal (Peer reviewed; Journal article, 2019-11-05)
      1. Climate change is a world‐wide threat to biodiversity and ecosystem structure, functioning and services. To understand the underlying drivers and mechanisms, and to predict the consequences for nature and people, we ...
    • Harvesting forage fish can prevent fishing-induced population collapses of large piscivorous fish 

      Soudijn, Floor H.; van Denderen, P. D.; Heino, Mikko Petteri; Dieckmann, Ulf; de Roos, André M. (Journal article; Peer reviewed, 2021)
      Fisheries have reduced the abundances of large piscivores—such as gadids (cod, pollock, etc.) and tunas—in ecosystems around the world. Fisheries also target smaller species—such as herring, capelin, and sprat—that are ...
    • Hatching time and alevin growth prior to the onset of exogenous feeding in farmed, wild and hybrid Norwegian Atlantic salmon 

      Solberg, Monica Favnebøe; Fjelldal, Per Gunnar; Nilsen, Frank; Glover, Kevin (Peer reviewed; Journal article, 2014-12-01)
      The onset of exogenous feeding, when juveniles emerge from the gravel, is a critical event for salmonids where early emergence and large size provide a competitive advantage in the wild. Studying 131 farmed, hybrid and ...
    • Heads and tails: The notochord develops differently in the cranium and caudal fin of Atlantic Salmon (Salmo salar, L.) 

      Kryvi, Harald; Nordvik, Kari; Fjelldal, Per Gunnar; Eilertsen, Mariann; Helvik, Jon Vidar; Støren, Eivind Wilhelm Nagel; Long, John H. (Journal article; Peer reviewed, 2020)
      While it is well known that the notochord of bony fishes changes over developmental time, less is known about how it varies across different body regions. In the development of the Atlantic salmon, Salmo salar L., cranial ...
    • Heavy and light chain homologs of ferritin are essential for blood-feeding and egg production of the ectoparasitic copepod Lepeophtheirus salmonis 

      Heggland, Erna Irene; Trösse, Christiane; Eichner, Christiane; Nilsen, Frank (Peer reviewed; Journal article, 2019)
      The salmon louse, Lepeophtheirus salmonis, is a hematophagous ectoparasite of salmonid fish. Due to its blood-feeding activity, the louse is exposed to great amounts of iron, which is an essential, yet potentially toxic ...
    • Helminths associated with terrestrial slugs in some parts of Europe 

      Filipiak, Anna; Haukeland, Solveig; Zając, Kamila S.; Lachowska-Cierlik, Dorota; Hatteland, Bjørn Arild (Journal article; Peer reviewed, 2020)
      A survey of helminths associated with terrestrial slugs focusing on the invasive Arion vulgaris and the native A. ater was conducted on populations from France, Germany, Netherlands, Norway and Poland. In total, 648 ...
    • Hematophagy in the salmon louse (Lepeophtheirus salmonis) : Characterization of genes and proteins involved in parasite blood-feeding 

      Heggland, Erna Irene (Doctoral thesis, 2020-02-13)
      The salmon louse (Lepeophtheirus salmonis) is an obligate, hematophagous ectoparasite infecting salmonid fish such as the Atlantic salmon (Salmo salar). The parasite is at present the number one threat to the Norwegian ...
    • Hensikter med lekser i biologiundervisning. En kvalitativ studie av læreres begrunnelser for bruk av lekser i biologifagene i videregående skole 

      Moe, Carine Rodal (Master thesis, 2017-06-20)
      Using homework is a long tradition within Norwegian schools and in most countries. Homework is not embedded in the Norwegian curriculum and hence most teachers choose if they want to give homework or not. Research shows ...
    • Herding mesopelagic fish by light 

      Kaartvedt, Stein; Røstad, Anders; Opdal, Anders Frugård; Aksnes, Dag Lorents (Peer reviewed; Journal article, 2019)
      To assess organisms forming mesopelagic scattering layers in the Red Sea, we took advantage of their reactions to light. We used a remotely operated vehicle (ROV) equipped with LED lamps for herding the acoustic targets ...
    • Herring (Clupea harengus) in Lindåspollene before and during spawning: spatial decisions and school dynamics 

      Fatnes, Ole Andreas (Master thesis, 2011-06-01)
      Abstract This study reports on the school dynamics of a self-sustained local population of Atlantic herring (Clupea harengus) in Lindåspollene, south-western Norway, during pre-spawning and spawning, observed over a period ...
    • Heterogeneous distribution of plankton within the mixed layer and its implications for bloom formation in tropical seas 

      Calbet, Albert; Agersted, Mette Dalgaard; Kaartvedt, Stein; Møhl, Malene; Møller, Eva Friis; Enghoff-Poulsen, Søren; Paulsen, Maria Lund; Solberg, Ingrid; Tang, Kam W.; Tönnesson, Kajsa; Raitsos, Dionysios E.; Nielsen, Torkel Gissel (Peer reviewed; Journal article, 2015-06-11)
      Intensive sampling at the coastal waters of the central Red Sea during a period of thermal stratification, prior to the main seasonal bloom during winter, showed that vertical patches of prokaryotes and microplankton ...
    • Heterotrophic nanoflagellate grazing facilitates subarctic Atlantic spring bloom development 

      Paulsen, Maria Lund; Riisgård, Karen; St. John, Mike; Thingstad, T. Frede; Nielsen, Torkel Gissel (Peer reviewed; Journal article, 2017)
      The subarctic Atlantic phytoplankton spring bloom is one of the largest biological features of the ocean; however, processes initiating the bloom are still not well understood. We hypothesize that the microbial grazing ...
    • The Hexactinellid Deep-Water Sponge Vazella pourtalesii (Schmidt, 1870) (Rossellidae) Copes With Temporarily Elevated Concentrations of Suspended Natural Sediment 

      Wurz, Erik; Beazley, Lindsay; MacDonald, Barry; Kenchington, Ellen; Rapp, Hans Tore; Osinga, Ronald (Journal article; Peer reviewed, 2021)
      Plumes of re-suspended sediment potentially smother and clog the aquiferous system of filter-feeding sponges with unknown implications for their health. For the first time, we examined the physiological responses of repeated ...
    • The Hfq RNA chaperone in the deep-branching Thermotogales lineage: Attempts to reveal its biological role 

      Vedøy, Oda Barth (Master thesis, 2015-02-01)
      Bacteria frequently use small RNAs (sRNAs) as part of their regulation of gene expression at the post-transcriptional level. Many of these sRNAs have been shown to depend on the RNA chaperone protein Hfq for their regulatory ...
    • Hiding in the background: community-level patterns in invertebrate herbivory across the tundra biome 

      Rheubottom, Sarah I.; Barrio, Isabel C.; Kozlov, Mikhail V.; Alatalo, Juha M.; Andersson, Tommi; Asmus, Ashley L.; Baubin, Capucine; Brearley, Francis Q.; Egelkraut, Dagmar; Ehrich, Dorothee; Gauthier, Gilles; Jonsdottir, Ingibjørg; Konieczka, Sophia; Lévesque, Esther; Olofsson, Johan; Prevéy, Janet S.; Slevan-Tremblay, Guillaume; Sokolov, Aleksandr; Sokolova, Natalia; Sokovnina, Svetlana; Speed, James David Mervyn; Suominen, Otso; Zverev, Vitali; Hik, David S. (Peer reviewed; Journal article, 2019)
      Invertebrate herbivores depend on external temperature for growth and metabolism. Continued warming in tundra ecosystems is proposed to result in increased invertebrate herbivory. However, empirical data about how current ...
    • High abundances of small copepods early developmental stages and nauplii strengthen the perception of a non-dormant Arctic winter 

      Barth-Jensen, Coralie Marie Christine; Daase, Malin; Ormańczyk, M.R.; Varpe, Øystein; Kwaśniewski, Sławomir; Svensen, Camilla (Journal article; Peer reviewed, 2022)
      The traditional view is that the Arctic polar night is a quiescent period for marine life, but recent reports of high levels of feeding and reproduction in both pelagic and benthic taxa have challenged this. We examined ...
    • High Arctic Invertebrate Biogeography. Patterns and Colonization Processes since the Last Glacial Maximum 

      Ávila Jiménez, María Luisa (Doctoral thesis, 2011-09-22)
      The biogeography of Arctic terrestrial invertebrate species, and particularly processes creating and determining patterns of species distribution, have rarely been considered as a whole, but rather on a regional basis, ...