Blar i NTNU Open på forfatter "Rønning, Bernt"
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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 ... -
Seksualitetsundervisningen på lærerutdanningen - Gir den fremtidige lærere det de etterspør?
Aftret, Pål Kjøsnes (Master thesis, 2022)Sammendrag I en kronikk publisert på NRK sine nettsider november 2021, skrev en lærerstudent at hun ikke følte seg kompetent til å undervise hennes fremtidige elever om seksualitet (Storesund, 2021). Gjennom undersøkelser ... -
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) -
Spatial structure and dispersal dynamics in a house sparrow metapopulation
Ranke, Peter Sjolte; Araya-Ajoy, Yimen; Ringsby, Thor Harald; Pärn, Henrik; Rønning, Bernt; Jensen, Henrik; Wright, Jonathan; Sæther, Bernt-Erik (Peer reviewed; Journal article, 2021)The effects of spatial structure on metapopulation dynamics depend upon the interaction between local population dynamics and dispersal, and how this relationship is affected by the geographical isolation and spatial ... -
Spatial variation in the evolutionary potential and constraints of basal metabolic rate and body mass in a wild bird
Nafstad, Ådne Messel; Rønning, Bernt; Aase, Kenneth; Ringsby, Thor Harald; Hagen, Ingerid Julie; Ranke, Peter Sjolte; Kvalnes, Thomas; Stawski, Clare; Räsänen, Katja; Sæther, Bernt-Erik; Muff, Stefanie; Jensen, Henrik (Peer reviewed; Journal article, 2023)An organism's energy budget is strongly related to resource consumption, performance, and fitness. Hence, understanding the evolution of key energetic traits, such as basal metabolic rate (BMR), in natural populations is ... -
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 effect of haemoglobin concentration on the thermal conductance and metabolic rate of house sparrows
Nybø, Karina (Master thesis, 2023)Endoterme dyr (pattedyr og fuglar) brukar metabolsk energi for å halde kroppstemperaturen sin på eit stabilt nivå. Den termoregulatoriske kurva, først beskrive av Scholander og Irving, viser korleis den metabolske raten ... -
The effects of inbreeding on resting metabolic rate and thermal conductance in wild house sparrows (Passer domesticus)
Knudsen, Sofie (Master thesis, 2022)Menneskelige påvirkninger fører til at populasjoner blir mindre, mer fragmenterte og isolerte, som kan resultere i populasjonsstørrelser som er mer sårbare for innavl. Når innavl reduserer trekk som er nært knyttet til ... -
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 ... -
Tilpasning av læreverk i naturfag for 4.trinn mot kompetansemål om immunforsvar fra LK20
Eriksen, Emilie Victoria Dunin (Bachelor thesis, 2021)Denne oppgaven tar for seg samsvaret mellom lærebøker og læreplaner i naturfag for 4.trinn, med fokus på temaet immunforsvar. Forskningsspørsmålet for oppgaven er: Hvordan bør nåværende læreverk i naturfag for 4.trinn ... -
Variation in generation time reveals density regulation as an important driver of pace of life in a bird metapopulation
Araya-Ajoy, Yimen; Niskanen, Alina Katariina; Froy, Hannah; Ranke, Peter Sjolte; Kvalnes, Thomas; Rønning, Bernt; Pepke, Michael Le; Jensen, Henrik; Ringsby, Thor Harald; Sæther, Bernt-Erik; Wright, Jonathan (Journal article; Peer reviewed, 2021)Generation time determines the pace of key demographic and evolutionary processes. Quantified as the weighted mean age at reproduction, it can be studied as a life-history trait that varies within and among populations and ...