Blar i NTNU Open på forfatter "Ranke, Peter Sjolte"
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No evidence of host-specific egg mimicry in Asian koels
Nahid, Mominul Islam; Fossøy, Frode; Stokke, Bård Gunnar; Abernathy, Virginia; Begum, Sajeda; Langmore, Naomi E.; Røskaft, Eivin; Ranke, Peter Sjolte (Peer reviewed; Journal article, 2021)Avian brood parasitism is costly for the host, in many cases leading to the evolution of defenses like discrimination of parasitic eggs. The parasite, in turn, may evolve mimetic eggs as a counter-adaptation to host egg ... -
Predator-Induced Selection on Phenotypes by Sparrowhawks (Accipiter nisus) in House sparrows (Passer domesticus)
Bjørsrud, Maren Sofie (Master thesis, 2022)Predasjon kan påvirke fenotypisk og genotypisk distribuering av trekk i byttedyret, samt ha en innflytelse på demografisk struktur og variasjon i mortalitet ved tid og rom. Denne studien undersøker hvordan predasjon av ... -
Promoting bird conservation in wetland-associated landscapes: Factors influencing avian crop damage and farmers’ attitudes
Htay, Thazin; Ringsby, Thor Harald; Røskaft, Eivin; Ranke, Peter Sjolte (Peer reviewed; Journal article, 2022)Integrating agroecosystems as bird habitats are very important for long-term conservation planning because intensified agricultural land use has been a global threat to avifauna. To make agriculture compatible with ... -
A regionally coherent ecological fingerprint of climate change, evidenced from natural history collections
Speed, James David Mervyn; Evankow, Ann; Petersen, Tanja Kofod; Ranke, Peter Sjolte; Nilsen, Nellie Henriette; Turner, Grace Winifred; Aagaard, Kaare; Bakken, Torkild; Davidsen, Jan Grimsrud; Dunshea, Glenn; Hassel, Kristian; Finstad, Anders Gravbrøt; Husby, Magne; Hårsaker, Karstein; Koksvik, Jan Ivar; Prestø, Tommy; Vange, Vibekke (Peer reviewed; Journal article, 2022)Climate change has dramatic impacts on ecological systems, affecting a range of ecological factors including phenology, species abundance, diversity, and distribution. The breadth of climate change impacts on ecological ... -
Resident bird species track inter-annual variation in spring phenology better than long-distance migrants in a subalpine habitat
Søraker, Jørgen Skavdal; Stokke, Bård Gunnar; Kleven, Oddmund; Moksnes, Arne; Rudolfsen, Geir; Skjærvø, Gine Roll; Vaagland, Henriette; Røskaft, Eivin; Ranke, Peter Sjolte (Journal article; Peer reviewed, 2022) -
Sex Allocation in Relation to Host Races in the Brood-Parasitic Common Cuckoo (Cuculus canorus)
Fossøy, Frode; Moksnes, Arne; Røskaft, Eivin; Antonov, Anton Tinchov; Dyrcz, Andrzej; Moskát, Csaba; Ranke, Peter Sjolte; Rutila, Jarkko; Vikan, Johan Reinert; Stokke, Bård Gunnar (Journal article; Peer reviewed, 2012)Sex allocation theory and empirical evidence both suggest that natural selection should favour maternal control of offspring sex ratio in relation to their ability to invest in the offspring. Generalist parasites constitute ... -
Social and ecological drivers of illegal bird hunting in the Indawgyi wetland ecosystem in Myanmar
Htay, Thazin; Htoo, Kyaw Kyaw; Røskaft, Eivin; Ringsby, Thor Harald; Ranke, Peter Sjolte (Peer reviewed; Journal article, 2023)Hunting and illegal bird killing are major concerns for avian conservation globally. Unsustainable bird hunting in wetland habitats, particularly those located along important flyways, has contributed to avifauna defaunation ... -
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 ... -
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 ... -
The socio-ecological impacts of the invasive house crow (Corvus splendes) in Tanzania
Rishøi, Per Henrik (Master thesis, 2023)Invasjonsarter er en av de største truslene for biologisk mangfold i naturen i dag. Lokal kunnskap og holdninger til invasjonsarter kan bidra til å forstå hvilken påvirkning de har på miljøet. Ved å avdekke allmennhetens ... -
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 ...