• A genetic insight to the population of African savannah elephants (Loxodonta africana) in the Serengeti Ecosystem, Tanzania. 

      Rosenlund, Håvard (Master thesis, 2011)
      African savannah elephants play a vital role in the Serengeti ecosystem with the opportunity to alter the entire ecosystem by its sheer number. Management of these animals are therefore of high importance, but little genetic ...
    • Adaptive responses of animals to climate change are most likely insufficient 

      Radchuk, Viktoriia; Reed, Thomas; Teplitsky, Céline; van der Pol, Martijn; Charmantier, Anne; Hassall, Christopher; Adamik, Peter; Adriaensen, Frank; Ahola, Markus P.; Arcese, Peter; Avilés, Jesus Miguel; Balbontin, Javier; Berg, Karl S.; Borras, Antoni; Burthe, Sarah; Clobert, Jean; Dehnhard, Nina; de Lope, Florentino; Dhondt, André A.; Dingemanse, Niels J.; Doi, Hideyuki; Eeva, Tapio; Fickel, Joerns; Filella, Iolanda; Fossøy, Frode; Goodenough, Anne E.; Hall, Stephen J.G.; Hansson, Bengt; Harris, Michael; Hasselquist, Dennis; Hickler, Thomas; Joshi, Jasmin; Kharouba, Heather; Martínez, Juan Gabriel; Mihoub, Jean-Baptiste; Mills, James A.; Molina-Morales, Mercedes; Moksnes, Arne; Ozgul, Arpat; Parejo, Deseada; Pilard, Philippe; Poisbleau, Maud; Rousset, Francois; Rödel, Mark-Oliver; Scott, David; Senar, Juan Carlos; Stefanescu, Constanti; Stokke, Bård Gunnar; Kusano, Tamotsu; Tarka, Maja; Tarwater, Corey E.; Thonicke, Kirsten; Thorley, Jack; Wilting, Andreas; Tryjanowski, Piotr; Merilä, Juha; Sheldon, Ben C.; Møller, Anders Pape; Matthysen, Erik; Janzen, Fredric; Dobson, F.Stephen; Visser, Marcel E.; Beissinger, Steven R.; Courtiol, Alexandre; Kramer-Schadt, Stephanie (Journal article; Peer reviewed, 2019)
      Biological responses to climate change have been widely documented across taxa and regions, but it remains unclear whether species are maintaining a good match between phenotype and environment, i.e. whether observed trait ...
    • Ancient origin and maternal inheritance of blue cuckoo eggs 

      Røskaft, Eivin; Møller, Anders P.; Liang, Wei; Sorenson, Michael D; Yang, Canchao; Takasu, Fugo; Stokke, Bård Gunnar; Fossøy, Frode; Moksnes, Arne; Ekrem, Torbjørn; Rutila, Jarkko (Journal article; Peer reviewed, 2016)
      Maternal inheritance via the female-specific W chromosome was long ago proposed as a potential solution to the evolutionary enigma of co-existing host-specific races (or ‘gentes’) in avian brood parasites. Here we report ...
    • Are cuckoos maximizing egg mimicry by selecting host individuals with better matching egg phenotypes? 

      Antonov, Anton Tinchov; Stokke, Bård Gunnar; Fossøy, Frode; Ranke, Peter Sjolte; Liang, Wei; Yang, Canchao; Moksnes, Arne; Shykoff, Jacqui A.; Røskaft, Eivin (Journal article; Peer reviewed, 2012)
      Background: Avian brood parasites and their hosts are involved in complex offence-defense coevolutionary arms races. The most common pair of reciprocal adaptations in these systems is egg discrimination by hosts and egg ...
    • Being stressed outside the park — conservation of African elephants (Loxodonta africana) in Namibia 

      Hunninck, Louis; Ringstad, Iris; Jackson, Craig Ryan; May, Roelof Frans; Fossøy, Frode; Uiseb, Kenneth; Killian, Werner; Røskaft, Eivin (Journal article; Peer reviewed, 2017)
      The conservation of the African savanna elephant (Loxodonta africana) is of prime importance for many African countries. Interactions between elephants and humans are known to induce stress and thereby have the potential ...
    • Body mass growth in nestlings of Svalbard snow buntings (Plectrophenax nivalis) in response to seasonal variation in arthropod biomass 

      Hilmarsen, Kjerstin Bakken (Master thesis, 2020)
      Hekkende fugler står overfor et utall avveininger i løpet av deres livssyklus for å maksimere overlevelse og reproduksjon som fører til høy levedyktighet. For trekkfugler inkluderer en av disse avveiningene når de skal ...
    • Breeding success in Arctic snow buntings (Plectrophenax nivalis) in relation to climatic variations 

      Kåsi, Tone Kjersti (Master thesis, 2012)
      The ongoing global warming is especially pronounced in the arctic, and it is therefore important to investigate the effect of these changes on arctic ecosystems. In this study the Snow bunting (Plectrophenax nivalis) ...
    • Causes and Consequences of Breeding Synchrony in the Snow Bunting (Plectrophenax nivalis ) 

      Skøien, Elida Arstad (Master thesis, 2015)
      Climate warming is happening rapidly in the Arctic and migratory birds are among the species expected to be affected by the predicted shifts in spring phenology. Using time-series data (1998 - 2014) from a population of ...
    • Characteristics determining host suitability for a generalist parasite 

      Stokke, Bård Gunnar; Ratikainen, Irja Ida; Moksnes, Arne; Røskaft, Eivin; Schulze-Hagen, Karl; Leech, David I.; Møller, Anders pape; Fossøy, Frode (Journal article; Peer reviewed, 2018)
      Host quality is critical for parasites. The common cuckoo Cuculus canorus is a generalist avian brood parasite, but individual females show strong preference for a specific host species. Here, we use three extensive datasets ...
    • Coevolution in Action: Disruptive Selection on Egg Colour in an Avian Brood Parasite and its Host 

      Yang, Chanchao; Liang, Wei; Cai, Yan; Shi, Suhua; Takasu, Fugo; Møller, Anders pape; Antonov, Anton Tinchov; Fossøy, Frode; Moksnes, Arne; Røskaft, Eivin; Stokke, Bård Gunnar (Journal article; Peer reviewed, 2010)
      Background: Trait polymorphism can evolve as a consequence of frequency-dependent selection. Coevolutionary interactions between hosts and parasites may lead to selection on both to evolve extreme phenotypes deviating ...
    • Confirmation of House Crows Corvus splendens laying immaculate blue eggs 

      Nahid, Mominul Islam; Fossøy, Frode; Stokke, Bård Gunnar; Begum, Sajeda; Røskaft, Eivin (Peer reviewed; Journal article, 2019)
      House Crows Corvus splendens lay eggs with bluish-green ground colour and black or brown blotches and only one egg morph was believed to exist. Here, we confirm the existence of an immaculate, spotless blue egg morph that ...
    • Contamination in an Arctic Environment: Abiotic and Biotic Impacts of Local Pollution 

      Beitveit, Gina Mariell (Master thesis, 2016)
      The aim of the present investigation was to evaluate whether Longyearbyen coal power plant and Gruve 6 have a significant impact on the chemical element distribution in soil and terrestrial biota in Adventdalen. Soil, ...
    • Development and behavior of Plaintive Cuckoo (Cacomantis merulinus) nestlings and their Common Tailorbird (Orthotomus sutorius) hosts 

      Tunheim, Odd Helge; Stokke, Bård Gunnar; Wang, Longwu; Yang, Canchao; Jiang, Aiwu; Liang, Wei; Røskaft, Eivin; Fossøy, Frode (Journal article; Peer reviewed, 2019)
      Background Our knowledge of avian brood parasitism is primarily based on studies of a few selected species. Recently, researchers have targeted a wider range of host–parasite systems, which has allowed further evaluation ...
    • Dietary composition, overlap and competition between impala and domestic goat as revealed by DNA metabarcoding 

      Fossum, Ingrid Aase Lingaas (Master thesis, 2017)
      In a world with a rapidly growing human population and limited resources, it is important to understand how we interact with wildlife to ensure their conservation. In Tanzania, the human population has more than tripled ...
    • Disappearance of eggs from non-parasitized nests of brood parasite hosts – the evolutionary equilibrium hypothesis revisited 

      Stokke, Bård Gunnar; Røskaft, Eivin; Moksnes, Arne; Møller, Anders Pape; Antonov, Anton Tinchov; Fossøy, Frode; Liang, Wei; Lopez-Iborra, German; Moskát, Csaba; Shykoff, Jacqui A.; Soler, Manuel; Vikan, Johan Reinert; Yang, Canchao; Takasu, Fugo (Journal article; Peer reviewed, 2016)
      The evolutionary equilibrium hypothesis was proposed to explain variation in egg rejection rates among individual hosts (intra- and interspecific) of avian brood parasites. Hosts may sometimes mistakenly reject own eggs ...
    • Diversity of parasitic cuckoos and their hosts in China 

      Yang, Canchao; Liang, Wei; Antonov, Anton Tinchov; Cai, Yan; Stokke, Bård Gunnar; Fossøy, Frode; Moksnes, Arne; Røskaft, Eivin (Journal article, 2012)
      In this exposé we provide the first review of host use by brood parasitic cuckoos in a multiple-cuckoo system in China, based on our own long-term field data and a compilation of observations obtained from the literature. ...
    • Egg phenotype matching by cuckoos in relation to discrimination by hosts and climatic conditions 

      Avilés, Jesús M.; Vikan, Johan Reinert; Fossøy, Frode; Antonov, Anton Tinchov; Moksnes, Arne; Røskaft, Eivin; Shykoff, Jacqui A.; Møller, Anders pape; Stokke, Bård Gunnar (Journal article, 2012)
      Although parasites and their hosts often coexist in a set of environmentally differentiated populations connected by gene flow, few empirical studies have considered a role of environmental variation in shaping correlations ...
    • Environmental correlates of variation in a holistic analysis of annual offspring production in the high Arctic songbird snow bunting (Plectrophenax nivalis) on Spitsbergen 

      Egil Lillehaug (Master thesis, 2019)
      Klima og vær er viktige abiotiske faktorer som påvirker organismer, spesielt i områder med store værforskjeller, som Arktis. Hvordan været påvirker reproduksjonssuksessen til en fugl som hekker der er spesielt interessant ...
    • First record of Common Tailorbird (Orthotomus sutorius) parasitism by Plaintive Cuckoo (Cacomantis merulinus) in Bangladesh 

      Nahid, Mominul Islam; Fossøy, Frode; Begum, Sajeda; Røskaft, Eivin; Stokke, Bård Gunnar (Peer reviewed; Journal article, 2016)
      The Plaintive Cuckoo (Cacomantis merulinus) is a widespread brood parasite in Asia, but no data on host species utilization in Bangladesh exist. By searching for nests of all possible host species of the Plaintive Cuckoo ...
    • First-time Migration in Juvenile Common Cuckoos Documented by Satellite Tracking 

      Vega, Marta Lomas; Willemoes, Mikkel; Thomson, Robert L.; Tolvanen, Jere; Rutila, Jarkko; Samas, Peter; Strandberg, Roine; Grim, Tomas; Fossøy, Frode; Stokke, Bård Gunnar; Thorup, Kasper (Journal article; Peer reviewed, 2016)
      Being an obligate parasite, juvenile common cuckoos Cuculus canorus are thought to reach their African wintering grounds from Palearctic breeding grounds without guidance from experienced conspecifics but this has not been ...