• Anti-parasite treatment and blood biochemistry in raptor nestlings 

      Hanssen, Sveinn Are; Sonne, Christian; Bustnes, Jan Ove; Schnug, Lisbeth; Bourgeon, Sophie; Ballesteros, Manuel; Eulaers, Igor; Moum, Truls Borg; Johnsen, Trond Vidar; Kjelgaard-Hansen, Mads; Herzke, Dorte; Jaspers, Veerle; Covaci, Adrian; Eens, Marcel; Halley, Duncan John; Erikstad, Kjell Einar; Ims, Rolf Anker (Journal article; Peer reviewed, 2017)
      We investigated the effects of parasite removal on various blood clinical–chemical variables (BCCVs). BCCVs are indicators of health, reflecting, e.g., homeostasis of liver, kidney function, and bone metabolism. The study ...
    • Antiparasite treatments reduce humoral immunity and impact oxidative status in raptor nestlings 

      Hanssen, Sveinn Are; Bustnes, Jan Ove; Schnug, Lisbeth; Bourgeon, Sophie; Johnsen, Trond Vidar; Ballesteros, Manuel; Sonne, Christian; Herzke, Dorte; Eulaers, Igor; Jaspers, Veerle; Covaci, Adrian; Eens, Marcel; Halley, Duncan John; Moum, Truls Borg; Ims, Rolf Anker; Erikstad, Kjell E (Journal article; Peer reviewed, 2013)
      Parasites are natural stressors that may have multiple negative effects on their host as they usurp energy and nutrients and may lead to costly immune responses that may cause oxidative stress. At early stages, animals ...
    • Are yolk thiamine levels associated with stress hormone levels in seabirds? 

      Wangen, Anne (Master thesis, 2022)
      Flere norske sjøfuglbestander minsker. Årsaken til populasjonsnedgangen kan være sammensatt, og ulike forklarende faktorer som klimaendringer, redusert mattilgang, forurensning, fremmede arter og sykdom har blitt foreslått. ...
    • At the edge of the species breeding distribution: the feeding ecology of the Long-tailed skua breeding in Svalbard 

      Aanensen, Solveig (Master thesis, 2022)
      Næringsøkologi er en viktig faktor for sjøfuglers liv, og setter grensene for hvor og hvordan de kan lykkes med å hekke. En av flere velbrukte metoder for å studere kosthold til sjøfugl er å studere deres stabile isotopnivåer. ...
    • Blood and feather concentrations of toxic elements in a Baltic and an Arctic seabird population 

      Fenstad, Anette; Bustnes, Jan Ove; Lierhagen, Syverin; Gabrielsen, Kristin Møller; Öst, Markus; Jaatinen, Kim; Hanssen, Sveinn Are; Moe, Børge; Jenssen, Bjørn Munro; Krøkje, Åse (Journal article; Peer reviewed, 2017)
      Wereport blood and feather concentrations of elements in the Baltic Sea and Arctic population of common eiders (Somateria mollissima). The endangered Baltic Sea population of eiders was demonstrably affected by element ...
    • 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 ...
    • DNA double-strand breaks in relation to persistent organic pollutants in a fasting seabird 

      Fenstad, Anette; Jenssen, Bjørn Munro; Moe, Børge; Hanssen, Sveinn Are; Bingham, Christopher George; Herzke, Dorte; Bustnes, Jan Ove; Krøkje, Åse (Journal article; Peer reviewed, 2014)
      Lipophilic persistent organic pollutants (POPs) are released from fat reserves during fasting, causing increased blood concentrations. Thus, POPs represent a potential anthropogenic stressor during fasting periods. We ...
    • Exposure of the Common Eider (Somateria mollissima) to toxic elements in relation to migration strategy and wintering area 

      Hill, Emily Jane (Master thesis, 2018)
      The Common Eider (Somateria mollissima) is a long-lived sea duck with a Holarctic distribution. Eiders within breeding populations have a predictable migration strategy, shown by capture-recapture research using geolocation ...
    • Eyes on the future: buffering increased costs of incubation by abandoning offspring 

      Hanssen, Sveinn Are; Erikstad, Kjell E.; Sandvik, Hanno; Tveraa, Torkild; Bustnes, Jan Ove (Peer reviewed; Journal article, 2023)
      Life history theory states that the resources invested in current reproduction must be traded off against resources needed for survival and future reproduction. Long-lived organisms have a higher residual reproductive value ...
    • 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 Does Spring Migration and Day Length Affect the Diving Ecology of a Capital Breeder Wintering at High Latitudes? 

      Kilen, Heidi (Master thesis, 2016)
      Foraging strategies in animals are influenced by conflicting constraints such as migration, reproduction and seasonal changes in the environment. Sea ducks are capital breeders and rely on endogenous reserves for reproduction. ...
    • Impacts of a warming climate on concentrations of organochlorines in a fasting high arctic marine bird: Direct vs. indirect effects? 

      Bustnes, Jan Ove; Bårdsen, Bård-Jørgen; Moe, Børge; Herzke, Dorte; Ballesteros, Manuel; Fenstad, Anette; Borgå, Katrine; Krogseth, Ingjerd Sunde; Eulaers, Igor; Skogeng, Lovise Pedersen; Gabrielsen, Geir Wing; Hanssen, Sveinn Are (Peer reviewed; Journal article, 2024)
      The present study examined how climate changes may impact the concentrations of lipophilic organochlorines (OCs) in the blood of fasting High Arctic common eiders (Somateria mollissima) during incubation. Polychlorinated ...
    • 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 ...
    • Repeatability and Flexibility in the Migration Strategies of an Arctic Seabird 

      Bjørnlid, Nora (Master thesis, 2016)
      The strategy of migration has evolved independently in many animal groups, but it is most widely and well developed in birds. Migrating species are expected to be severely affected by human induces climate change, and the ...
    • A risk assessment of the effects of mercury on Baltic Sea, Greater North Sea and North Atlantic wildlife, fish and bivalves 

      Dietz, Rune; Fort, Jérôme; Sonne, Christian; Albert, Céline; Bustnes, Jan Ove; Christensen, Thomas Kjær; Ciesielski, Tomasz Maciej; Danielsen, Jóhannis; Dastnai, Sam; Eens, Marcel; Erikstad, Kjell E; Galatius, Anders; Garbus, Svend-Erik; Gilg, Oliver; Hanssen, Sveinn Are; Helander, Björn; Helberg, Morten; Jaspers, Veerle; Jenssen, Bjørn Munro; Jónsson, Jón Einar; Kauhala, Kaarina; Kolbeinsson, Yann; Kyhn, Line A.; Labansen, Aili Lage; Larsen, Martin M.; Lindstrøm, Ulf; Reiertsen, Tone Kristin; Rigét, Frank F.; Roos, Anna; Strand, Jakob; Strøm, Hallvard; Søndergaard, Jens; Sun, Jiachen; Teilmann, Jonas; Therkildsen, Ole Roland; Thórarinsson, Thorkell Lindberg; Tjørnløv, Rune Skjold; Wilson, Simon; Eulaers, Igor (Peer reviewed; Journal article, 2020)
      A wide range of species, including marine mammals, seabirds, birds of prey, fish and bivalves, were investigated for potential population health risks resulting from contemporary (post 2000) mercury (Hg) exposure, using ...
    • Seabird Migration Strategies: Flight Budgets, Diel Activity Patterns, and Lunar Influence 

      Bonnet-Lebrun, Anne-Sophie; Dias, Maria P.; Phillips, Richard A.; Granadeiro, José P.; de L. Brooke, M.; Chastel, Olivier; Clay, Thomas A.; Fayet, Annette L.; Gilg, Olivier; González-Solís, Jacob; Guilford, Tim; Hanssen, Sveinn Are; Hedd, April; Jaeger, Audrey; Krietsch, Johannes; Lang, Johannes; Le Corre, Matthieu; Militao, Teresa; Moe, Børge; Montevecchi, William A.; Peter, Hans-Ulrich; Pinet, Patrick; Rayner, Matt J.; Reid, Tim; Reyes-González, José Manuel; Ryan, Peter G.; Sagar, Paul M.; Schmidt, Niels M.; Thompson, David R.; van Bemmelen, Rob; Watanuki, Yutaka; Weimerskirch, Henri; Yamamoto, Takashi; Catry, Paulo (Peer reviewed; Journal article, 2021)
      Every year, billions of birds undertake extensive migrations between breeding and non-breeding areas, facing challenges that require behavioural adjustments, particularly to flight timing and duration. Such adjustments in ...
    • Temporal variation in circulating concentrations of organochlorine pollutants in a pelagic seabird breeding in the high arctic 

      Bustnes, Jan Ove; Bårdsen, Bård-Jørgen; Moe, Børge; Herzke, Dorte; Hanssen, Sveinn Are; Sagerup, Kjetil; Bech, Claus; Nordstad, Tore; Chastel, Olivier; Tartu, Sabrina; Gabrielsen, Geir W. (Journal article; Peer reviewed, 2017)
      The present study explored short-term temporal variations in circulating concentrations of 3 legacy organochlorines with different physicochemical properties (polychlorinated biphenyl 153 [PCB-153], p,p0-dichlorodiphenyl ...
    • Trans-Equatorial Migration Routes, Staging Sites and Wintering Areas of a High-Arctic Avian Predator: The Long-tailed Skua (Stercorarius longicaudus) 

      Gilg, Olivier; Moe, Børge; Hanssen, Sveinn Are; Schmidt, Niels Martin; Sittler, Benoit; Hansen, Jannik; Reneerkens, Jeroen; Sabard, Brigitte; Chastel, Olivier; Moreau, Jérôme; Phillips, Richard A.; Oudman, Thomas; Biersma, Elisabeth M.; Fenstad, Anette; Lang, Johannes; Bollache, Loïc (Journal article; Peer reviewed, 2013)
      The Long-tailed Skua, a small (,300 g) Arctic-breeding predator and seabird, is a functionally very important component of the Arctic vertebrate communities in summer, but little is known about its migration and winter ...
    • Variation in predation and nest survival rates in the Arctic breeding Common Eider (Somateria mollissima) 

      Eldøy, Ingvild Håvarstein (Master thesis, 2019)
      Flere migrerende sjøfuglarter hekker i arktiske områder for å kunne utnytte fordelaktige aspekter ved miljøet i form av overlevelse eller reproduksjon. Tidligere studer har antydet minkende predasjonsrisiko med økende ...