Blar i NTNU Open på forfatter "Pepke, Michael Le"
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Accounting for phylogenetic relatedness in cross-species analyses of telomere shortening rates
Pepke, Michael Le; Eisenberg, Dan T.A. (Journal article; Peer reviewed, 2020)Telomeres are repeating DNA sequences found on the ends of chromosomes, which shorten with age and are implicated in senescence. Cross-species analyses of telomere shortening rates (TSR) and telomere lengths are important ... -
Artificial size selection experiment reveals telomere length dynamics and fitness consequences in a wild passerine
Pepke, Michael Le; Kvalnes, Thomas; Rønning, Bernt; Jensen, Henrik; Boner, Winnie; Sæther, Bernt-Erik; Monaghan, Pat; Ringsby, Thor Harald (Peer reviewed; Journal article, 2022)Telomere dynamics could underlie life-history trade-offs among growth, size and longevity, but our ability to quantify such processes in natural, unmanipulated populations is limited. We investigated how 4 years of artificial ... -
Causes and consequences of variation in early-life telomere length in a bird metapopulation
Pepke, Michael Le; Kvalnes, Thomas; Ranke, Peter Sjolte; Araya-Ajoy, Yimen; Wright, Jonathan; Sæther, Bernt-Erik; Jensen, Henrik; Ringsby, Thor Harald (Peer reviewed; Journal article, 2022)Environmental conditions during early-life development can have lasting effects shaping individual heterogeneity in fitness and fitness-related traits. The length of telomeres, the DNA sequences protecting chromosome ends, ... -
The ecological and evolutionary role of telomere length in house sparrows
Pepke, Michael Le (Doctoral theses at NTNU;2021:420, Doctoral thesis, 2021)Telomeres, the DNA sequences capping the ends of linear chromosomes, are ancient molecular structures that are shared among most eucaryotes. The telomeres protect chromosomes from degradation and are vital to genome ... -
The evolution of extra-pair paternity and paternal care in birds
Søraker, Jørgen Skavdal; Wright, Jonathan; Hanslin, Fredrik Øglænd; Pepke, Michael Le (Journal article; Peer reviewed, 2023)Extra-pair paternity (EPP) influences the relatedness between social parents and offspring. Therefore, one might expect the level of EPP to influence levels of paternal investment. Here, we investigated the effect of ... -
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 ... -
Inbreeding is associated with shorter early-life telomere length in a wild passerine
Pepke, Michael Le; Niskanen, Alina Katariina; Kvalnes, Thomas; Boner, Winnie; Sæther, Bernt-Erik; Ringsby, Thor Harald; Jensen, Henrik (Peer reviewed; Journal article, 2022)Inbreeding can have negative effects on survival and reproduction, which may be of conservation concern in small and isolated populations. However, the physiological mechanisms underlying inbreeding depression are not ... -
Longitudinal telomere dynamics within natural lifespans of a wild bird
Pepke, Michael Le; Kvalnes, Thomas; Wright, Jonathan; Araya Ajoy, Yimen Gerardo; Ranke, Peter Sjolte; Boner, Winnie; Monaghan, Pat; Sæther, Bernt-Erik; Jensen, Henrik; Ringsby, Thor Harald (Peer reviewed; Journal article, 2023)Telomeres, the nucleotide sequences that protect the ends of eukaryotic chromosomes, shorten with each cell division and telomere loss may be influenced by environmental factors. Telomere length (TL) decreases with age in ... -
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, ... -
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 influence of arthropods availability on fledgling morphology and reproductive success in wild house sparrows
Saugestad, Margrete (Master thesis, 2023)Over hele verden rapporteres det om nedgang i antall innsekter samt fugler i kulturlandskapet. Redusert tilgjengelighet av leddyr har vært foreslått som en mulig årsak til nedgangen av insektspisende fugler gjennom ... -
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 ...