• Assessing the effect of roads on impala (Aepyceros melampus) stress levels using faecal glucocorticoid metabolites 

      Lunde, Even Tvede (Master thesis, 2013)
      Loss of habitat is the main cause of species extinction, which today is 100 - 1000 times faster than the background extinction rate before the presence of mankind. One cause is that natural areas are being increasingly ...
    • Black-legged kittiwakes (Rissa tridactyla) change their leukocyte profiles because of handling, repeated sampling and development 

      Skomsø, Dagfinn Breivik (Master thesis, 2013)
      Similar to other long-lived species, Black-legged kittiwakes (Rissa tridactyla) need to invest in the immune system to ensure future survival. However, since resources are considered to be limited, this investment constitutes ...
    • Black-legged kittiwakes as messengers of Atlantification in the Arctic 

      Vihtakari, Mikko; Welcker, Jorg; Moe, Børge; Chastel, Olivier; Tartu, Sabrina; Hop, Haakon; Bech, Claus; Descamps, Sébastien; Gabrielsen, Geir W. (Journal article; Peer reviewed, 2018)
      Climate warming is rapidly altering marine ecosystems towards a more temperate state on the European side of the Arctic. However, this “Atlantification” has rarely been confirmed, as long-term datasets on Arctic marine ...
    • Climate change and the increasing impact of polar bears on bird populations 

      Prop, Jouke; Aars, Jon; Bårdsen, Bård-Jørgen; Hanssen, Sveinn Are; Bech, Claus; Bourgeon, Sophie; Fouw, Jimmy de; Gabrielsen, Geir W.; Lang, Johannes; Noreen, Elin; Oudman, Thomas; Sittler, Benoit; stempniewicz, Lech; Tombre, Ingunn; Wolters, Eva; Moe, Børge (Journal article; Peer reviewed, 2015-03-25)
      The Arctic is becoming warmer at a high rate, and contractions in the extent of sea ice are currently changing the habitats of marine top-predators dependent on ice. Polar bears (Ursus maritimus) depend on sea ice for ...
    • Corticosterone mediates carry-over effects between breeding and migration in the kittiwake Rissa tridactyla 

      Schultner, Jannik; Moe, Børge; Chastel, Olivier; Tartu, Sabrina; Bech, Claus; Kitaysky, Alexander S. (Journal article; Peer reviewed, 2014)
      Carry-over effects, i.e. when processes in one season influence processes in the next, are believed to have important effects on behavior and fitness in animals. Despite an increasing interest in the identification of ...
    • Differential reproductive responses to stress reveal the role of life-history strategies within a species 

      Schultner, Jannik; Kitaysky, Alexander S.; Gabrielsen, Geir W.; Hatch, Scott; Bech, Claus (Journal article; Peer reviewed, 2013)
      Life-history strategies describe that ‘slow’- in contrast to ‘fast’-living species allocate resources cautiously towards reproduction to enhance survival. Recent evidence suggests that variation in strategies exists not ...
    • Does human activities affect stress level in Serengeti elephants (Loxodonta africana)? 

      Tingvold, Heidi Gunilla (Master thesis, 2011)
      African elephants play a vital role in the Serengeti ecosystem, with the opportunity to alter the entire ecosystem by their sheer number. Management of these animals with the ambition of improving their welfare is therefore ...
    • Effect of experimentally increased adult foraging effort on the offspring in black legged kittiwakes (Rissa tridactyla) 

      Smalås, Rune (Master thesis, 2011)
      The Black legged Kittiwake (Rissa tridactyla) is one of the more extensively studied seagull species, and much of their nesting behaviour and physiology concerning the breeding period has already been examined to a high ...
    • Effect of Manipulated Stress Levels of Adult Kittiwakes (Rissa tridactyla) on Offspring Immunocompetence 

      Bråthen, Vegard Sandøy (Master thesis, 2013)
      Low food availability increase food stress and can cause a shift of energy expenditure to invest in self-survival rather than reproductive effort in breeding Black-legged kittiwakes (Rissa tridactyla). This affects early ...
    • Effects of Climate on Chick Growth in the Black-legged Kittiwake (Rissa tridactyla) 

      Alvestad, Rakel Jansen (Master thesis, 2015)
      Seabirds are declining worldwide as a result of anthropogenic influences, primarily through climate change affecting the food availability. One of the declining species is the black-legged kittiwake (Rissa tridactyla), ...
    • Effects of repeated investigator disturbance on corticosterone concentrations and the immune system in chicks of Black-Legged Kittiwake (Rissa tridactyla) 

      Tvedten, Øyvind Gjønnes (Master thesis, 2017)
      Repeated exposure to investigator disturbance increases the corticosterone levels and can give detrimental effects on the growth and immune system in nestlings. As the offspring is developing, they need to invest in different ...
    • Exposure to oxychlordane is associated with shorter telomeres in arctic breeding kittiwakes 

      Blévin, Pierre; Angelier, Frédéric; Tartu, Sabrina; Ruault, Stéphanie; Bustamante, Paco; Herzke, Dorte; Moe, Børge; Bech, Claus; Gabrielsen, Geir W.; Bustnes, Jan Ove; Chastel, Olivier (Journal article; Peer reviewed, 2016)
      Telomeres are DNA-protein complexes located at the end of chromosomes, which play an important role in maintaining the genomic integrity. Telomeres shorten at each cell division and previous studies have shown that telomere ...
    • Fysisk prestasjon hos kvinnelige langrennsløpere i kulde og varme.: Termoregulatoriske og metabolske responser 

      Renberg, Julie (Master thesis, 2011)
      Bakgrunn: Langrennsutøvere blir utsatt for veldig varierende termisk stress. Termisk stress er vist å ha negativ effekt på prestasjonen til mannlige utholdenhetsutøvere. Prestasjon under fysisk aktivitet i kulde er mindre ...
    • Global phenological insensitivity to shifting ocean temperatures among seabirds 

      Keogan, Katharine; Daunt, Francis; Wanless, Sarah; Phillips, Richard A.; Walling, Craig A.; Agnew, Philippa; Ainley, David G.; Anker-Nilssen, Tycho; Ballard, Grant; Barrett, Robert T; Barton, Kerry J.; Bech, Claus; Becker, Peter; Berglund, Per-Arvid; Bollache, Loïc; Bond, Alexander L.; Bouwhuis, Sandra; Bradley, Russell W.; Burr, Zofia; Camphuysen, Kees; Catry, Paulo; Chiaradia, Andre; Christensen-Dalsgaard, Signe; Cuthbert, Richard; Dehnhard, Nina; Descamps, Sébastien; Diamond, Tony; Divoky, George; Drummond, Hugh; Dugger, Katie M.; Dunn, Michael J.; Emmerson, Louise; Erikstad, Kjell Einar; Fort, Jérôme; Fraser, William; Genovart, Meritxell; Gilg, Olivier; González-Solís, Jacob; Granadeiro, José Pedro; Grémillet, David; Hansen, Jannik; Hanssen, Sveinn Are; Harris, Mike; Hedd, April; Hinke, Jefferson; Igual, José Manuel; Jahncke, Jaime; Jones, Ian; Kappes, Peter J.; Lang, Johannes; Langset, Magdalene; Lorentsen, Svein Håkon; Moe, Børge; Reiertsen, Tone; Lescroël, Amélie; Lyver, Phil O’B.; Mallory, Mark; Montevecchi, William A.; Monticelli, David; Mostello, Carolyn; Newell, Mark; Nicholson, Lisa; Nisbet, Ian; Olsson, Olof; Oro, Daniel; Pattison, Vivian; Poisbleau, Maud; Pyk, Tanya; Quintana, Flavio; Ramos, Jaime A.; Ramos, Raül; Rodríguez, Cristina; Ryan, Peter; Sanz-Aguilar, Ana; Schmidt, Niels M.; Shannon, Paula; Sittler, Benoit; Southwell, Colin; Surman, Christopher; Svagelj, Walter S.; Trivelpiece, Wayne; Warzybok, Pete; Watanuki, Yutaka; Weimerskirch, Henri; Wilson, Peter R.; Wood, Andrew G.; Phillimore, Albert B.; Lewis, Sue (Journal article; Peer reviewed, 2018)
      Reproductive timing in many taxa plays a key role in determining breeding productivity1, and is often sensitive to climatic conditions2. Current climate change may alter the timing of breeding at different rates across ...
    • How to quantify thermal acclimation capacity? 

      Einum, Sigurd; Ratikainen, Irja Ida; Wright, Jonathan; Pelabon, Christophe; Bech, Claus; Jutfelt, Fredrik; Stawski, Clare; Burton, Tim (Peer reviewed; Journal article, 2019)
      The capacity of organisms to acclimate will influence their ability to cope with ongoing global changes in thermal regimes. Here we highlight methodological issues associated with recent attempts to quantify variation in ...
    • Interactions between Pollutant Exposure and the Physiology in Adult Kittiwakes (Rissa tridactyla) at Svalbard 

      Svendsen, Niels Borup (Master thesis, 2015)
      This study investigated the use of feathers as a useful non-destructive biomonitoring tool for novel organic pollutants in black-legged kittiwakes (Rissa tridactyla), and evaluated the interaction of both novel and legacy ...
    • Is basal metabolic rate associated with recruit production and survival in free-living house sparrows? 

      Rønning, Bernt; Broggi, Juli; Bech, Claus; Moe, Børge; Ringsby, Thor Harald; Pärn, Henrik; Hagen, Ingerid Julie; Sæther, Bernt-Erik; Jensen, Henrik; Grindstaff, Jennifer (Journal article; Peer reviewed, 2016)
      Life history theory predicts that available energy is limited and needs to be allocated among different processes such as growth, reproduction and self-maintenance. Basal metabolic rate (BMR), a common measure of an animal's ...
    • Is the rate of metabolic ageing and survival determined by basal metabolic rate in the zebra finch? 

      Rønning, Bernt; Moe, Børge; Berntsen, Johan Henrik Hårdensson; Noreen, Elin; Bech, Claus (Journal article; Peer reviewed, 2014-09-29)
      The relationship between energy metabolism and ageing is of great interest because aerobic metabolism is the primary source of reactive oxygen species which is believed to be of major importance in the ageing process. We ...
    • Is there plasticity in developmental instability? The effect of daily thermal fluctuations in an ectotherm 

      Kielland, Øystein Nordeide; Bech, Claus; Einum, Sigurd (Journal article; Peer reviewed, 2017)
      Diversified bet‐hedging (DBH) by production of within‐genotype phenotypic variance may evolve to maximize fitness in stochastic environments. Bet‐hedging is generally associated with parental effects, but phenotypic variation ...
    • Isbjørnens effekt på fugl i et arktisk klima i endring - Sluttrapport for Svalbards miljøvernfond 

      Moe, Børge; Prop, Jouke; Aars, Jon; Bårdsen, Bård-Jørgen; Hanssen, Sveinn Are; Bech, Claus; Bourgeon, Sophie; Fouw, Jimmy de; Gabrielsen, Geir Wing; Lang, Johannes; Noreen, Elin; Oudman, Thomas; Sittler, Benoit; Stempniewicz, Lech; Tombre, Ingunn; Wolters, Eva (NINA Rapport;1163, Research report, 2015)
      Arktis blir stadig varmere og utbredelsen av havis blir mindre. Det forandrer leveområdet til de mange artene som er avhengige av havis. Isbjørnen er avhengig av havis for å jakte på sel, og økende lengde på den isfrie ...