Browsing NTNU Open by Author "Lundregan, Sarah"
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Effects of inbreeding on lay date in house sparrows (Passer domesticus)
Muller, Amandine Sophie (Master thesis, 2021)Innavlsdepresjon (en reduksjon i individuell fitness forårsaket av innavl) har blitt observert hos mange ulike arter, men mekanismene som gir innavlsdepresjon er fremdeles uklare. Innavl og innavlsdepresjon studeres vanligvis ... -
Examination of the Adaptive Immune Response to Syngamus trachea in the House Sparrow
Folland, Amanda Marie Arvesen (Master thesis, 2022)Global oppvarming og andre antropologiske faktorer gjør at forhold mellom parasitter og vertsorganismer endrer seg. For å forstå årsakene til og for å være forberedt på konsekvensene av dette er det essensielt å studere ... -
Genetic architecture and heritability of early-life telomere length in a wild passerine
Pepke, Michael Le; Kvalnes, Thomas; Lundregan, Sarah; Boner, Winnie; Monaghan, Pat; Sæther, Bernt-Erik; Jensen, Henrik; Ringsby, Thor Harald (Peer reviewed; Journal article, 2021)Early-life telomere length (TL) is associated with fitness in a range of organisms. Little is known about the genetic basis of variation in TL in wild animal populations, but to understand the evolutionary and ecological ... -
Genetic Basis of Variation in Bill Morphology in a Free-Living House Sparrow Metapopulation
Lundregan, Sarah (Master thesis, 2017)Bill morphology is an ecologically important trait, which shows substantial phenotypic variation, is highly heritable and is under selection in many bird species. These characteristics underscore the suitability of bill ... -
Infection by a helminth parasite is associated with changes in DNA methylation in the house sparrow
Lundregan, Sarah; Mäkinen, Hannu; Buer, Amberly; Holand, Håkon; Jensen, Henrik; Husby, Arild (Peer reviewed; Journal article, 2022)Parasites can exert strong selective pressures on their hosts and influence the evolution of host immunity. While several studies have examined the genetic basis for parasite resistance, the role of epigenetics in the ... -
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 ... -
NR1D1 methylation as an epigenetic response during Syngamus trachea infection in the house sparrow
Buer, Amberly (Master thesis, 2022)Climate change may increase host-parasite interactions as temperature and precipitation levels become more favorable for parasite reproduction, survival, and transmission. Consequently, increased parasite prevalence as a ... -
Signatures of genetic adaptation to extremely varied Australian environments in introduced European house sparrows
Andrew, Samuel C.; Jensen, Henrik; Hagen, Ingerid Julie; Lundregan, Sarah; Griffith, Simon C. (Journal article; Peer reviewed, 2018)Due to its history of multiple introductions to novel environments worldwide, the house sparrow has been used as a model species to study local adaption in invasive avian species. New genomic resources such as a custom ... -
Signs of adaptation to trace metal contamination in a common urban bird
Andrew, Samuel C.; Taylor, Mark Patrick; Lundregan, Sarah; Lien, Sigbjørn; Jensen, Henrik; Griffith, Simon C. (Journal article; Peer reviewed, 2018)Metals and metalloids at elevated concentrations can be toxic to both humans and wildlife. In particular, lead exposure can act as a stressor to wildlife and cause negative effects on fitness. Any ability to adapt to stress ... -
Spatio-temporal variation in phenotypic selection in a metapopulation of house sparrows (Passer domesticus)
Attila, Samu (Master thesis, 2020)Romlig-tidsmessig variasjon i naturlig seleksjon kan ha viktige evolusjonære konsekvenser og innsamling av kunnskap om slik variasjon kan vise seg å være nyttig i bevaringsbiologi. Mange studier har målt romlig eller ...