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    • Characterizing morphological (co)variation using structural equation models: Body size, allometric relationships and evolvability in a house sparrow metapopulation 

      Araya-Ajoy, Yimen; Ranke, Peter Sjolte; Kvalnes, Thomas; Rønning, Bernt; Holand, Håkon; Myhre, Ane Marlene; Pärn, Henrik; Jensen, Henrik; Ringsby, Thor Harald; Sæther, Bernt-Erik; Wright, Jonathan (Peer reviewed; Journal article, 2019)
      Body size plays a key role in the ecology and evolution of all organisms. Therefore, quantifying the sources of morphological (co)variation, dependent and independent of body size, is of key importance when trying to ...
    • Controlling for P-value inflation in allele frequency change in experimental evolution and artificial selection experiments 

      Kemppainen, Petri; Rønning, Bernt; Kvalnes, Thomas; Hagen, Ingerid Julie; Ringsby, Thor Harald; Billing, Anna Maria; Pärn, Henrik; Lien, Sigbjørn; Husby, Arild; Sæther, Bernt-Erik; Jensen, Henrik (Journal article; Peer reviewed, 2017)
      Experimental evolution studies can be used to explore genomic response to artificial and natural selection. In such studies, loci that display larger allele frequency change than expected by genetic drift alone are assumed ...
    • Covarying Behaviours and Innovation in a House Sparrow Metapopulation - Implications for Social Foraging 

      Hammerås, John (Master thesis, 2016)
      Individuals in populations of many species have been found to differ consistently in suites of correlating behavioural measures. These phenomena appear to be heritable and subject to selection, thus making it as important ...
    • Indirect social effects of the individual strategy in producer-scrounger foraging interactions 

      Pettersen, Nils Håkon (Master thesis, 2017)
      When animals interact socially they experience and react to phenotypes of their social partners. Such interactions can affect behaviours and fitness, and therefore opponent effects (i.e. indirect social effects) can maintain ...
    • Individual variation and indirect social effects in producer-scrounger behavior in groups of house sparrows, Passer domesticus 

      Lilleng, Simen (Master thesis, 2019)
      Sosial foringsatferd involverer intraspesifikk konkurranse over begrenset mattilgjengelighet som over tid har formet evolusjonen av sosiale forings strategier. Individer er del av et dynamisk sosialt miljø som ofte avhenger ...
    • Inferences of genetic architecture of bill morphology in house sparrow using a high-density SNP array point to a polygenic basis 

      Lundregan, Sarah; Hagen, Ingerid Julie; Gohli, Jostein; Niskanen, Alina Katariina; Kemppainen, Petri; Ringsby, Thor Harald; Kvalnes, Thomas; Pärn, Henrik; Rønning, Bernt; Holand, Håkon; Ranke, Peter Sjolte; Båtnes, Anna Solvang; Selvik, Linn-Karina M.; Lien, Sigbjørn; Sæther, Bernt-Erik; Husby, Arild; Jensen, Henrik (Journal article; Peer reviewed, 2018)
      Understanding the genetic architecture of quantitative traits can provide insights into the mechanisms driving phenotypic evolution. Bill morphology is an ecologically important and phenotypically variable trait, which is ...
    • Insights into the genetic architecture of morphological and sexually selected traits in two passerine bird species 

      Silva, Catarina; McFarlane, S. Eryn; Hagen, Ingerid Julie; Rönnegård, Lars; Billing, Anna; Kvalnes, Thomas; Kemppainen, Petri; Rønning, Bernt; Ringsby, Thor Harald; Sæther, Bernt-Erik; Qvarnström, Anna; Ellegren, Hans; Jensen, Henrik; Husby, Arild (Journal article; Peer reviewed, 2017)
      Knowledge about the underlying genetic architecture of phenotypic traits is needed to understand and predict their evolutionary dynamics. The number of causal loci underlying most phenotypic traits, the magnitude of their ...
    • 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 (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 ...
    • Linking variation in personality and behavioural syndromes to social foraging and producer-scrounger effects in house sparrows (Passer domesticus) 

      Olsen, Mirja Carola (Master thesis, 2016)
      Consistent behavioural differences between individuals across time and situations are referred to as animal personality. Associated with this are behavioural syndromes , which are suites of correlated behaviours across ...
    • Nest Microclimate in Relation to Maternal Phenotypic Quality and Reproductive Success in a Wild Population of House Sparrows (Passer domesticus) 

      Thurmann-Nielsen, Cathrine (Master thesis, 2019)
      En bedre forståelse av faktorene som påvirker produksjonen av flyvedyktige unger og rekrutterende fugler er viktig for å forstå økologiske og evolusjonære prosesser. De tidligste livsstadiene er kritiske for overlevelse, ...
    • Omvendt undervisning versus tradisjonell undervisning i naturfag på ungdomsskolen: En studie av elevers motivasjon, forberedelser og læringsutbytte 

      Kvello, Pål; Barstad, Stine Slaatsveen; Rønning, Bernt; Moen, Elin Tronsaune; Østerlie, Ove (Journal article, 2020)
      Som svar på en rekke forespørsler om empiriske data på effekten av omvendt undervisning, har vi utført en mindre studie som sammenligner elevers motivasjon, forberedelser og læringsutbytte mellom omvendt undervisning og ...
    • On being the right size: Increased body size is associated with reduced telomere length under natural conditions 

      Ringsby, Thor Harald; Jensen, Henrik; Pärn, Henrik; Kvalnes, Thomas; Boner, Winnie; Gillespie, Robert; Holand, Håkon; Hagen, Ingerid Julie; Rønning, Bernt; Sæther, Bernt-Erik; Monaghan, Pat (Journal article, 2015)
      Evolution of body size is likely to involve trade-offs between body size, growth rate and longevity. Within species, larger body size is associated with faster growth and ageing, and reduced longevity, but the cellular ...
    • Reversal of response to artificial selection on body size in a wild passerine bird 

      Kvalnes, Thomas; Ringsby, Thor Harald; Jensen, Henrik; Hagen, Ingerid Julie; Rønning, Bernt; Pärn, Henrik; Holand, Håkon; Engen, Steinar; Sæther, Bernt-Erik (Journal article, 2017)
      A general assumption in quantitative genetics is the existence of an intermediate phenotype with higher mean individual fitness in the average environment than more extreme phenotypes. Here we investigate the evolvability ...
    • Sources of inter- and intra-individual variation in basal metabolic rate in the zebra finch,: Sources of inter- and Taeniopygia guttata 

      Rønning, Bernt (Doktoravhandlinger ved NTNU, 1503-8181; 2008:138, Doctoral thesis, 2008)
    • Spatiotemporal Variation and Fitness Consequences of Blood Hemoglobin Concentration in free-living House Sparrow (Passer domesticus) Nestlings 

      Jakobsen, Marte (Master thesis, 2018)
      Studies have suggested that variation in hemoglobin concentration among individuals can be used as an indicator of individual condition as it reflects the amount of oxygen that is supplied to the tissues. Thus, it is ...
    • Steroids in house sparrows (Passer domesticus): Effects of POPs and male quality signalling 

      Nossen, Ida; Ciesielski, Tomasz Maciej; Dimmen, Malene Vågen; Jensen, Henrik; Ringsby, Thor Harald; Polder, Anuschka; Rønning, Bernt; Jenssen, Bjørn Munro; Styrishave, Bjarne (Journal article, 2016)
      At high trophic levels, environmental contaminants have been found to affect endocrinological processes. Less attention has been paid to species at lower trophic levels. The house sparrow (Passer domesticus) may be a useful ...
    • The easy road to genome-wide medium density SNP screening in a non-model species: development and application of a 10K SNP-chip for the house sparrow (Passer domesticus) 

      Hagen, Ingerid Julie; Billing, Anna Maria; Rønning, Bernt; Pedersen, Sindre Andre; Pärn, Henrik; Slate, Jon; Jensen, Henrik (Journal article, 2013)
      With the advent of next generation sequencing, new avenues have opened to study genomics in wild populations of non-model species. Here, we describe a successful approach to a genome-wide medium density Single Nucleotide ...
    • The effect of arthropod availability on reproductive phenology and success in a multi-brooded passerine Passer domesticus 

      Julseth, Martin Gjestrud (Master thesis, 2019)
      Leddyr er en viktig proteinkilde under den tidlige veksten og utviklingen til mange små tetrapoder, derunder reirungene til mange arter av spurvefugler. Sesongvariasjonen i leddyrsamfunn forventes derfor å være en viktig ...
    • The Genetics of Basal Metabolic Rate in free-living Populations of House Sparrows (Passer domesticus) 

      Tennfjord, Øystein Øy (Master thesis, 2016)
      Animals must allocate their energy reserves between growth, reproduction and survival. Basal metabolic rate (BMR) is a quantitative trait, which can represent the cost of living , and is a key component in the energy ...

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