Now showing items 316-335 of 592

    • Large mesopelagic fishes biomass and trophic efficiency in the open ocean 

      Irigoien, Xabier; Klevjer, Thor A.; Røstad, Anders; Martinez, U.; Boyra, G.; Acuna, J. L.; Bode, A.; Echevarria, F.; Gonzalez-Gordillo, J. I.; Hernández-León, Santiago; Augsti, S.; Aksnes, Dag Lorents; Duarte, C. M.; Kaartvedt, Stein (Nature Publishing Group, 2014-02-07)
      With a current estimate of ~1,000 million tons, mesopelagic fishes likely dominate the world total fishes biomass. However, recent acoustic observations show that mesopelagic fishes biomass could be significantly larger ...
      Journal article
    • Last-century vegetational changes in northern Europe. Characterisation, causes, and consequences 

      Kapfer, Jutta (The University of Bergen, 2011-11-04)
      In the face of recent changes in environmental conditions and climate, longterm studies provide important insights into patterns and processes of vegetational change. In northern Europe, however, long-term studies are ...
      Doctoral thesis
    • Length Related Diurnal Vertical Migration of Cod (Gadus morhua L.), Haddock (Melanogrammus aeglefinus L.) and Redfish (Sebastes spp.) in the Barents Sea 

      Einarsson, Haraldur Arnar (The University of Bergen, 2001)
      Vertical fish migrations can increase variability in bottom survey data, especially if unknown diurnal length-frequency distribution is different between layers. Surveys, using echo sounder technique to estimate demersal ...
      Master thesis
    • Life after fire: smoke and ash as germination cues in ericads, herbs and graminoids of northern heathlands 

      Bargmann, Tessa; Måren, Inger Elisabeth; Vandvik, Vigdis (Wiley, 2014-05-02)
      Question: What is the impact of the fire cues smoke and ash on seed germination of important functional groups in the heathland system, namely ericads, herbs and graminoids? We predict that if germination from heathland ...
      Journal article
    • Life after fire: the impact of fire on species composition and diversity in coastal heathlands 

      Bargmann, Tessa (The University of Bergen, 2015-09-11)
      Fire prone coastal heathlands are widespread, and range from naturally fire prone Mediterranean-type heathlands, to the anthropogenic heathlands of north-west Europe. Regardless of its source, fire is an important disturbance ...
      Doctoral thesis
    • Life history adaptations to seasonality 

      Varpe, Øystein Heggernes (The University of Bergen, 2007-02-16)
      The thesis contains studies of animal life histories at high latitudes. Several topics are covered; from ecosystem consequences of life histories to tests of specific behavioural predictions put forward based on life ...
      Doctoral thesis
    • Life-history implications of the allometric scaling of growth 

      Boukal, David S.; Dieckmann, Ulf; Enberg, Katja; Heino, Mikko Petteri; Jørgensen, Christian (Elsevier, 2014-10-21)
      Several phenomenological descriptions, such as the von Bertalanffy growth model, have been widely used to describe size-at-age and individual growth across a diverse range of organisms. However, for modelling life histories, ...
      Journal article
    • Lifespan extension in a semelparous chordate occurs via developmental growth arrest just prior to meiotic entry 

      Subramaniam, Gunasekaran; Campsteijn, Coen; Thompson, Eric (PLoS, 2014-04-02)
      It is proposed that the ageing process is linked to signaling from the germline such that the rate of ageing can be adjusted to the state of the reproductive system, allowing these two processes to co-evolve. Mechanistic ...
      Journal article
    • Ligandaktivering av aryl hydrokarbon reseptor 2 (AhR2) fra Atlanterhavstorsk (Gadus morhua) ved bruk av luciferase genreportersystem 

      Endresen, Martha Sæstad (The University of Bergen, 2016-07-01)
      Aryl hydrokarbon reseptor 2 fra atlanterhavstorsk (gmAhR2) er en ligandaktivert transkripsjonsfaktor som tidligere har blitt klonet og karakterisert som xenobiotisk sensor. Ved Universitetet i Bergen er det blitt etablert ...
      Master thesis
    • Limited male incubation ability and the evolution of egg size in shorebirds 

      Lislevand, Terje; Thomas, Gavin H. (The Royal Society, 2006-06-22)
      In bird species where males incubate but are smaller than females, egg size may be constrained by male body size, and hence ability to incubate the eggs. Using data from 71 such shorebird species, we show that egg size ...
      Journal articlePeer reviewed
    • The lineage-specific evolution of aquaporin gene clusters facilitated tetrapod terrestrial adaptation 

      Finn, Roderick Nigel; Chauvigné, Francois; Hlidberg, Jón Baldur; Cutler, Christopher P.; Cerdà, Joan (Public Library of Science, 2014-11-26)
      A major physiological barrier for aquatic organisms adapting to terrestrial life is dessication in the aerial environment. This barrier was nevertheless overcome by the Devonian ancestors of extant Tetrapoda, but the origin ...
      Journal article
    • Long-term change in a behavioural trait: truncated spawning distribution and demography in Northeast Arctic cod 

      Opdal, Anders Frugård; Jørgensen, Christian (Wiley, 2015-04)
      Harvesting may be a potent driver of demographic change and contemporary evolution, which both may have great impacts on animal populations. Research has focused on changes in phenotypic traits that are easily quantifiable ...
      Journal article
    • Long-term disturbance dynamics and resilience of tropical peat swamp forests 

      Cole, Lydia E.S.; Bhagwat, Shonil; Willis, Katherine Jane (Wiley, 2015-01)
      1. The coastal peat swamp forests of Sarawak, Malaysian Borneo, are undergoing rapid conversion, predominantly into oil palm plantations. This wetland ecosystem is assumed to have experienced insignificant disturbance in ...
      Journal article
    • Long-term dynamics of wadi trees in a hyper-arid cultural landscape 

      Andersen, Gidske L. (The University of Bergen, 2007-03-09)
      This study focuses on the long-term dynamics of wadi (dry river valley) trees, in particular Acacia tortilis (Forssk.) Hayne, in the hyper-arid Eastern Desert of Egypt. The project was motivated by the importance of ...
      Doctoral thesis
    • Long-term effects of environmentally relevant doses of 2,2’,4,4’,5,5’ hexachlorobiphenyl (PCB153) on neurobehavioural development, health and spontaneous behaviour in maternally exposed mice 

      Haave, Marte; Bernhard, Annette; Jellestad, Finn K.; Heegaard, Einar; Brattelid, Trond; Lundebye, Anne-Katrine (BioMed Central, 2011-01-13)
      Background: Polychlorinated biphenyls (PCBs) are widespread in the environment, human food and breast milk. Seafood is known to contain nutrients beneficial for the normal development and function of the brain, but ...
      Peer reviewedJournal article
    • Longevity and growth of Acacia tortilis; insights from 14C content and anatomy of wood 

      Andersen, Gidske L.; Krzywinski, Knut (BioMed Central, 2007-06-15)
      Background: Acacia tortilis is a keystone species across arid ecosystems in Africa and the Middle East. Yet, its life-history, longevity and growth are poorly known, and consequently ongoing changes in tree populations ...
      Journal articlePeer reviewed
    • Looking forward through the past: identification of 50 priority research questions in palaeoecology 

      Seddon, Alistair; Mackay, Anson W.; Baker, Ambroise G.; Birks, Harry John Betteley; Breman, Elinor; Buck, C. E.; Ellis, Erle C.; Froyd, Cynthia A.; Gill, Jacquelyn L.; Gillson, Lindsey; Johnson, Edward A.; Jones, Vivienne J.; Juggins, Stephen; Macias-Fauria, Marc; Mills, Keely; Morris, Jesse L.; Nogués-Bravo, David; Punyasena, Surangi W.; Roland, Thomas P.; Tanentzap, Andrew; Willis, Katherine Jane; Aberhan, Martin; van Asperen, Eline N.; Austin, William E. N.; Battarbee, Richard W.; Bhagwat, Shonil; Belanger, Christina L.; Bennett, Keith D.; Birks, Hilary H.; Ramsey, Christopher Bronk; Brooks, Stephen J.; de Bruyn, Mark; Butler, Paul G.; Chambers, F. M.; Clarke, Stewart J.; Davies, Althea L.; Dearing, John A.; Ezard, Thomas H. G.; Feurdean, Angelica; Flower, Roger J.; Gell, Peter; Hausmann, Sonja; Hogan, Erika J.; Hopkins, Melanie J.; Jeffers, Elizabeth S.; Korhola, Atte; Marchant, Robert; Kiefer, Thorsten; Lamentowicz, Mariusz; Larocque-Tobler, Isabelle; López-Merino, Lourdes; Liow, Lee Hsiang; McGowan, Suzanne; Miller, Joshua H.; Montoya, Encarni; Morton, Oliver; Nogué, Sandra; Onoufriou, Chloe; Boush, Lisa P.; Rodriguez-Sanchez, F; Rose, Neil L.; Sayer, Carl D.; Shaw, Helen E.; Payne, Richard; Simpson, Gavin; Sohar, Kadri; Whitehouse, Nicki J.; Williams, John W.; Witkowski, Andrzej (Wiley, 2014)
      Journal article
    • Lukket merdsystem - AquaDomen: Effekt på smittedynamikk 

      Tolås, Ida Vilinn (The University of Bergen, 2012-06-04)
      Oppdrettsnæringen har blitt kritisert for å ha en negativ innvirkning på omliggende miljø, der smitteoverføring av ulike agens til ville laksepopulasjoner er et stort problem. Det er også reist bekymring ved den genetiske ...
      Master thesis
    • Macrozooplankton as feed source for farmed fish - growth, product quality and safety 

      Suontama, Jorma (The University of BergenInstitute of Marine Research, 2006-12-14)
      Doctoral thesis
    • Making predictions in a changing world: The benefits of individual-based ecology 

      Stillman, Richard A.; Railsback, Steven F.; Giske, Jarl; Berger, Uta; Grimm, Volker (Oxford University Press on behalf of the American Institute of Biological Sciences, 2015-12-17)
      Ecologists urgently need a better ability to predict how environmental change affects biodiversity. We examine individual-based ecology (IBE), a research paradigm that promises better a predictive ability by using ...
      Journal article