Browsing Høstingsarkiver by Author "Østbye, Kjartan"
Now showing items 1-18 of 18
-
Tamayo, Ana-Maria Peris; Devineau, Olivier; Præbel, Kim; Kahilainen, Kimmo Kalevi; Østbye, Kjartan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Taugbøl, Annette; Quinn, Thomas P.; Østbye, Kjartan; Vøllestad, Leif Asbjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Häkli, Katja; Østbye, Kjartan; Kahilainen, Kimmo Kalevi; Amundsen, Per-Arne; Præbel, Kim (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Kozak, Natalia; Ahonen, Salla A.; Keva, Ossi; Østbye, Kjartan; Taipale, Sami J.; Hayden, Brian; Kahilainen, Kimmo K. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Hagenlund, Mari; Østbye, Kjartan; Langdal, Kjell; Hassve, Marius Hagen; Pettersen, Ruben Alexander; Anderson, Eric; Gregersen, Finn; Præbel, Kim (Journal article / Tidsskriftartikkel / PublishedVersion; 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 ...
-
Haugen, Hanne; Dervo, Børre Kind; Østbye, Kjartan; Heggenes, Jan; Devineau, Olivier; Linløkken, Arne N. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Pettersen, Ruben Alexander; Junge, Claudia; Østbye, Kjartan; Mo, Tor Atle; Vøllestad, Leif Asbjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Mazzarella, Anna; Boessenkool, Sanne; Østbye, Kjartan; Vøllestad, Leif Asbjørn; Trucchi, Emiliano (Journal article / Tidsskriftartikkel / PublishedVersion; 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 in ...
-
Pettersen, Ruben A; Østbye, Kjartan; Holmen, Johannes; Vøllestad, Leif A; Mo, Tor A (Journal article / Tidsskriftartikkel / PublishedVersion; 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 ...
-
Haugen, Hanne; Linløkken, Arne; Østbye, Kjartan; Heggenes, Jan (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Kozak, Natalia; Kahilainen, Kimmo Kalevi; Pakkanen, Hannu K.; Hayden, Brian; Østbye, Kjartan; Taipale, Sami J. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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 ...
-
Østbye, Kjartan; Østbye, Eivind; Lien, Anne May; Lee, Laura R.; Lauritzen, Stein-Erik; Carlini, David B. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)Cave animals provide a unique opportunity to study contrasts in phenotype and life history in strikingly different environments when compared to surface populations, potentially related to natural selection. As such, we ...
-
Walton, Zea Ann; Hagenlund, Mari; Østbye, Kjartan; Samelius, Gustaf; Odden, Morten; Norman, Anita J.; Willebrand, Tomas; Spong, Göran (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)Abstract 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 ...
-
Østbye, Kjartan; Taugbøl, Annette; Ravinet, Mark; Harrod, Chris; Pettersen, Ruben A; Bernatchez, Louis; Vøllestad, Leif A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 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; ...
-
Haugen, Hanne; Devineau, Olivier; Heggenes, Jan; Østbye, Kjartan; Linløkken, Arne N. (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)Remote sensing data comprise a valuable information source for many ecological landscape studies that may be under-utilized because of an overwhelming amount of processing methods and derived variables. These complexities, ...
-
Taugbøl, Annette; Arntsen, Tina; Østbye, Kjartan; Vøllestad, Leif Asbjørn (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2014)Salinity is one of the key factors that affects metabolism, survival and distribution of fish species, as all fish osmoregulate and euryhaline fish maintain osmotic differences between their extracellular fluid and either ...
-
de Meo, Ilaria; Østbye, Kjartan; Kahilainen, Kimmo Kalevi; Poleo, Antonio (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Abstract Predation is a major evolutionary force determining life‐history traits in prey by direct and indirect mechanisms. This study focuses on life‐history trait variation in crucian carp ( Carassius carassius ), a ...
-
Østbye, Kjartan; Harrod, Chris; Gregersen, Finn; Klepaker, Tom; Schulz, Michael; Schluter, Dolph; Vøllestad, Leif A (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2016)Background Studying how trophic traits and niche use are related in natural populations is important in order to understand adaptation and specialization. Here, we describe trophic trait diversity in ...