Browsing Institutt for biologi by Title
Now showing items 599-618 of 2516
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Distribution, interspecific variation and habitats of scyphozoan polyp colonies in Trondheimsfjorden
(Master thesis, 2019)Manetoppblomstringer er fremdeles et emne med høy økonomisk og økologisk betydning. Det er også en pågående debatt om hvorvidt frekvensen og intensiteten av maneoppblomstringer øker eller ikke. Kombinert med tvetydige data ... -
Diurnal and nocturnal movements of Kori Bustards in the Serengeti ecosystem
(Peer reviewed; Journal article, 2022)Although Kori Bustards (Ardeotis kori) are reported as diurnal, the species’ activity patterns have not been assessed to date. We report on the movement during different parts of the day of eight GPS-tagged individuals in ... -
Divergence and constraint in the thermal sensitivity of aquatic insect swimming performance
(Peer reviewed; Journal article, 2020)Environmental temperature variation may play a significant role in the adaptive evolutionary divergence of ectotherm thermal performance curves (TPCs). However, divergence in TPCs may also be constrained due to various ... -
Divergence in rates of phenotypic plasticity among ectotherms
(Peer reviewed; Journal article, 2022)An individual's fitness cost associated with environmental change likely depends on the rate of adaptive phenotypic plasticity, and yet our understanding of plasticity rates in an ecological and evolutionary context remains ... -
Divergence in Thermal Reaction Norms of Life-History Traits Among Populations of Daphnia magna
(Master thesis, 2018)Patterns of phenotypic and genetic variance in thermal reaction norms allow predicting evolutionary response for a population. The ability of phenotypic traits to respond to selection depends on their genetic variance, and ... -
Diversity and seasonal development of large zooplankton along physical gradients in the Arctic Barents Sea
(Peer reviewed; Journal article, 2023)Due to ongoing climate change, a new Arctic Ocean ecosystem is emerging. Within the framework of the Nansen Legacy project, we investigated the community composition of the large zooplankton and its seasonal development ... -
Diversity of fish inside and around hydrothermal vent fields on the Arctic Mid-Ocean Ridge.
(Master thesis, 2023)Etterspørselen av mineraler øker globalt, og med det grønne skiftet trengs det løsninger for å håndtere den betydelige økningen i produksjonen av for eksempel elektriske kjøretøy og vindturbiner. Sjeldne jordarter og ... -
Diversity of parasitic cuckoos and their hosts in China
(Journal article, 2012)In this exposé we provide the first review of host use by brood parasitic cuckoos in a multiple-cuckoo system in China, based on our own long-term field data and a compilation of observations obtained from the literature. ... -
Diversity, Loss, and Gain of Malaria Parasites in a Globally Invasive Bird
(Journal article; Peer reviewed, 2011)Invasive species can displace natives, and thus identifying the traits that make aliens successful is crucial for predicting and preventing biodiversity loss. Pathogens may play an important role in the invasive process, ... -
DNA double strand breaks and chemical elements in incubating female common eiders (Somateria mollissima) in Christiansø, Denmark.
(Master thesis, 2018)Genotoxic agents are ubiquitous in the Baltic Sea and may cause effects not only at a molecular level but at an individual and population level as well. Fasting during reproduction may lead to a state of oxidative stress ... -
DNA Double-Strand Breaks in Arctic Char, Salvelinus alpinus, from Bjørnøya
(Master thesis, 2016)Long-range atmospheric transport has led to persistent organic pollutants (POPs) finding their way far from their sources of origin and into the Arctic and are accumulated in biota. The activity of large seabird colonies ... -
DNA double-strand breaks in relation to organohalogenated contaminants in arctic seabird species
(Master thesis, 2020)Organohalogenerte miljøgifter (OHCs) har blitt assosiert med ugunstige effekter på DNA- integriteten, noe som kan føre til alvorlige biologiske konsekvenser både på individ-og populasjonsnivå. Hensikten med denne studien ... -
DNA double-strand breaks in relation to persistent organic pollutants in a fasting seabird
(Journal article; Peer reviewed, 2014)Lipophilic persistent organic pollutants (POPs) are released from fat reserves during fasting, causing increased blood concentrations. Thus, POPs represent a potential anthropogenic stressor during fasting periods. We ... -
DNA double‐strand breaks in Arctic char (Salvelinus alpinus) from Bjørnøya in the Norwegian Arctic
(Journal article; Peer reviewed, 2019)High levels of organochlorine contaminants (OCs) have been found in arctic char (Salvelinus alpinus) from Lake Ellasjøen, Bjørnøya (Norwegian Arctic). The aim of the present study was to investigate the potential genotoxic ... -
DNA Metabarcoding Diet Analysis of Water Vole (Arvicola amphibius) in Northern Norway
(Master thesis, 2019)Studier og kunnskap om hvilke faktorer som påvirker populasjonsdynamikk er svært viktig i økologi. Det gir viktig informasjon som er nyttig for blant annet bevaring av biodiversitet i en tid der den trues av globale ... -
DNA-double strand breaks in relation to PFASs and toxic elements in incubating female common eiders (Somateria mollissima) in the central Baltic Sea
(Master thesis, 2019)Per- and polyfluorinated alkylated substances (PFASs) and toxic elements have both been linked to adverse effects on genetic material which can result in severe consequences for individuals and entire populations. The aim ... -
DNAqua-Net: Developing new genetic tools for bioassessment and monitoring of aquatic ecosystems in Europe
(Journal article; Peer reviewed, 2016)The protection, preservation and restoration of aquatic ecosystems and their functions are of global importance. For European states it became legally binding mainly through the EU-Water Framework Directive (WFD). In order ... -
Do carnivore surveys match reports of carnivore presence by pastoralists? A case of the eastern Serengeti ecosystem
(Peer reviewed; Journal article, 2020)Human-carnivore encounters are common where humans and wild carnivores share the same landscape. The frequency of such encounters gives insight regarding carnivore density and might correlate with human-carnivore conflict ... -
Do genetic differences in growth thermal reaction norms maintain genetic variation in timing of diapause induction?
(Peer reviewed; Journal article, 2021)An optimal timing for diapause induction through the sexual production of dormant propagules is expected in organisms with temporary populations. Yet, empirical studies often find high within-population genetic variation ... -
Do levels of per- and polyfluorinated alkylated substances (PFASs) in snow bunting eggs increase with proximity to airports in Svalbard?
(Master thesis, 2017)Per- and polyfluorinated alkylated substances (PFASs) are used in a variety of industrial and consumer applications, including polymer materials and in aqueous fire fighting foam (AFFFs). Research over the last 20 years ...