Blar i Artikkel - fagfellevurdert vitenskapelig / Articles - peer-reviewed på forfatter "Østbye, Kjartan"
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Allometric relationships in morphological traits associated with foraging, swimming ability, and predator defense reveal adaptations toward brackish and freshwater environments in the threespine stickleback
Taugbøl, Annette; Quinn, Thomas P.; Østbye, Kjartan; Vøllestad, Leif Asbjørn (Peer reviewed; Journal article, 2020)Freshwater colonization by threespine stickleback has led to divergence in morphology between ancestral marine and derived freshwater populations, making them ideal for studying natural selection on phenotypes. In an open ... -
“And if you gaze long into an abyss, the abyss gazes also into thee ”: four morphs of Arctic charr adapting to a depth gradient in Lake Tinnsjøen
Østbye, Kjartan; Hassve, Marius Hagen; Tamayo, Ana-Maria Peris; Hagenlund, Mari; Vogler, Thomas; Præbel, Kim (Peer reviewed; Journal article, 2020)The origin of species is a central topic in biology. Ecological speciation might be a driver in adaptive radiation, providing a framework for understanding mechanisms, level, and rate of diversification. The Arctic charr ... -
A brain and a head for a different habitat: Size variation in four morphs of Arctic charr (Salvelinus alpinus (L.)) in a deep oligotrophic lake
Tamayo, Ana-Maria Peris; Devineau, Olivier; Præbel, Kim; Kahilainen, Kimmo Kalevi; Østbye, Kjartan (Peer reviewed; Journal article, 2020)Adaptive radiation is the diversification of species to different ecological niches and has repeatedly occurred in different salmonid fish of postglacial lakes. In Lake Tinnsjøen, one of the largest and deepest lakes in ... -
Comparing Fish Density and Echo Strength Distribution Recorded by Two Generations of Single Beam Echo Sounders
Linløkken, Arne N.; Næstad, Frode; Langdal, Kjell; Østbye, Kjartan (Peer reviewed; Journal article, 2019) -
Diversifying selection drives parallel evolution of gill raker number and body size along the speciation continuum of European whitefish
Häkli, Katja; Østbye, Kjartan; Kahilainen, Kimmo Kalevi; Amundsen, Per-Arne; Præbel, Kim (Peer reviewed; Journal article, 2018)Adaptive radiation is the evolution of ecological and phenotypical diversity. It arises via ecological opportunity that promotes the exploration of underutilized or novel niches mediating specialization and reproductive ... -
Ecological speciation in postglacial European whitefish: rapid adaptive radiations into the littoral, pelagic, and profundal lake habitats
Præbel, Kim; Knudsen, Rune; Siwertsson, Anna; Karhunen, Markku; Kahilainen, Kimmo K.; Ovaskainen, Otso; Østbye, Kjartan; Peruzzi, Stefano; Fevolden, Svein-Erik; Amundsen, Per-Arne (Journal article; Peer reviewed, 2013)Understanding how a monophyletic lineage of a species diverges into several adaptive forms has received increased attention in recent years, but the underly- ing mechanisms in this process are still under debate. Postglacial ... -
Environmental and biological factors are joint drivers of mercury biomagnification in subarctic lake food webs along a climate and productivity gradient
Kozak, Natalia; Ahonen, Salla A.; Keva, Ossi; Østbye, Kjartan; Taipale, Sami J.; Hayden, Brian; Kahilainen, Kimmo K. (Peer reviewed; Journal article, 2021)Subarctic lakes are getting warmer and more productive due to the joint effects of climate change and intensive land-use practices (e.g. forest clear-cutting and peatland ditching), processes that potentially increase ... -
Fauna crime: elucidating the potential source and introduction history of European smelt (Osmerus eperlanus L.) into Lake Storsjøen, Norway
Hagenlund, Mari; Østbye, Kjartan; Langdal, Kjell; Hassve, Marius; Pettersen, Ruben A.; Anderson, Eric; Gregersen, Finn; Præbel, Kim (Journal article; Peer reviewed, 2015)The ability to accurately determine the original source of invading species offers several powerful applications in invasive species ecology and management and may enable important information on the invading species in ... -
Fauna crime: elucidating the potential source and introduction history of European smelt (Osmerus eperlanus L.) into Lake Storsjøen, Norway
Hagenlund, Mari; Østbye, Kjartan; Langdal, Kjell; Hassve, Marius Hagen; Pettersen, Ruben Alexander; Anderson, Eric; Gregersen, Finn; Præbel, Kim (Peer reviewed; Journal article, 2015)The ability to accurately determine the original source of invading species offers several powerful applications in invasive species ecology and management and may enable important information on the invading species in ... -
Genetic diversity, gene flow, and landscape resistance in a pond-breeding amphibian in agricultural and natural forested landscapes in Norway
Haugen, Hanne; Dervo, Børre Kind; Østbye, Kjartan; Heggenes, Jan; Devineau, Olivier; Linløkken, Arne N. (Peer reviewed; Journal article, 2023)Genetic diversity is a key part of biodiversity, threatened by human activities that lead to loss of gene flow and reduction of effective population sizes. Gene flow is a result of both landscape connectivity and demographic ... -
Genetic population structure of the monogenean parasite Gyrodactylus thymalli and its host European grayling (Thymallus thymallus) in a large Norwegian lake
Pettersen, Ruben Alexander; Junge, Claudia; Østbye, Kjartan; Mo, Tor Atle; Vøllestad, Leif Asbjørn (Peer reviewed; Journal article, 2020)Understanding how populations are structured in space and time is a central question in evolutionary biology. Parasites and their hosts are assumed to evolve together, however, detailed understanding of mechanisms leading ... -
Genetic Structure and Gene flow in Red Foxes (Vulpes vulpes) in Scandinavia: Implications for the Potential Future Spread of Echinococcus multilocularis Tapeworm
Hagenlund, Mari; Linløkken, Arne N.; Østbye, Kjartan; Walton, Zea Ann; Odden, Morten; Samelius, Gustav; Willebrand, Tomas; Wilson, Robert Charles (Peer reviewed; Journal article, 2019) -
Genomic signatures of the plateless phenotype in the threespine stickleback
Mazzarella, Anna B.; Boessenkool, Sanne; Østbye, Kjartan; Vøllestad, Leif Asbjørn; Trucchi, Emiliano (Journal article; Peer reviewed, 2016)Understanding the genetic basis of traits involved in adaptive divergence and speciation is one of the most fundamental objectives in evolutionary biology. Toward that end, we look for signatures of extreme plate loss ... -
Gyrodactylus spp. diversity in native and introduced minnow (Phoxinus phoxinus) populations: no support for “the enemy release” hypothesis
Pettersen, Ruben Alexander; Østbye, Kjartan; Holmen, Johannes; Vøllestad, Leif Asbjørn; Mo, Tor Atle (Journal article; Peer reviewed, 2016)Background: Translocation of native species and introduction of non-native species are potentially harmful to the existing biota by introducing e.g. diseases, parasites and organisms that may negatively affect the native ... -
Landscape genetics of northern crested newt Triturus cristatus populations in a contrasting natural and human-impacted boreal forest
Haugen, Hanne; Linløkken, Arne; Østbye, Kjartan; Heggenes, Jan (Peer reviewed; Journal article, 2020)Among vertebrates, amphibians currently have the highest proportion of threatened species worldwide, mainly through loss of habitat, leading to increased population isolation. Smaller amphibian populations may lose more ... -
Mercury and amino acid content relations in northern pike (Esox lucius) in subarctic lakes along a climate-productivity gradient
Kozak, Natalia; Kahilainen, Kimmo Kalevi; Pakkanen, Hannu K.; Hayden, Brian; Østbye, Kjartan; Taipale, Sami J. (Peer reviewed; Journal article, 2023)Mercury is a highly toxic element for consumers, but its relation to amino acids and physiology of wild fish is not well known. The main aim of this study was to evaluate how total mercury content (THg) of northern pike ... -
Morphology and life history divergence in cave and surface populations of Gammarus lacustris (L.)
Østbye, Kjartan; Østbye, Eivind; Lien, Anne May; Lee, Laura R.; Lauritzen, Stein-Erik; Carlini, David B. (Peer reviewed; Journal article, 2018) -
Moving far, staying close: red fox dispersal patterns revealed by SNP genotyping
Walton, Zea Ann; Hagenlund, Mari; Østbye, Kjartan; Samelius, Gustaf; Odden, Morten; Norman, Anita J.; Willebrand, Tomas; Spong, Göran (Peer reviewed; Journal article, 2021)The genetic structure of a population can provide important insights into animal movements at varying geographical scales. Individual and social behaviors, such as philopatry and dispersal, affect patterns of relatedness, ... -
Ongoing niche differentiation under high gene flow in a polymorphic brackish water threespine stickleback (Gasterosteus aculeatus) population
Østbye, Kjartan; Taugbøl, Annette; Ravinet, Mark; Harrod, Chris; Pettersen, Ruben Alexander; Bernatchez, Louis (Peer reviewed; Journal article, 2018)Background: Marine threespine sticklebacks colonized and adapted to brackish and freshwater environments since the last Pleistocene glacial. Throughout the Holarctic, three lateral plate morphs are observed; the low, partial ... -
Predator community and resource use jointly modulate the inducible defense response in body height of crucian carp
de Meo, Ilaria; Østbye, Kjartan; Kahilainen, Kimmo Kalevi; Hayden, Brian; Fagertun, Christian; Poleo, Antonio (Peer reviewed; Journal article, 2021)Phenotypic plasticity can be expressed as changes in body shape in response to environmental variability. Crucian carp (Carassius carassius), a widespread cyprinid, displays remarkable plasticity in body morphology and ...