Browsing Institutt for biologi by Title
Now showing items 2180-2199 of 2516
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Temporal trends of legacy organochlorines in different white-tailed eagle (Haliaeetus albicilla) subpopulations: A retrospective investigation using archived feathers
(Peer reviewed; Journal article, 2020)Understanding the spatiotemporal patterns of legacy organochlorines (OCs) is often difficult because monitoring practices differ among studies, fragmented study periods, and unaccounted confounding by ecological variables. ... -
Temporal trends of persistent organic pollutants in Barents Sea polar bears (Ursus maritimus) in relation to changes in feeding habits and body condition
(Journal article; Peer reviewed, 2018)Temporal trends of persistent organic pollutants (POPs: PCBs, OH-PCBs, p,p′-DDE, HCB, β-HCH, oxychlordane, BDE-47, and 153) in relation to changes in feeding habits and body condition in adult female polar bears (Ursus ... -
Temporal variation in circulating concentrations of organochlorine pollutants in a pelagic seabird breeding in the high arctic
(Journal article; Peer reviewed, 2017)The present study explored short-term temporal variations in circulating concentrations of 3 legacy organochlorines with different physicochemical properties (polychlorinated biphenyl 153 [PCB-153], p,p0-dichlorodiphenyl ... -
Temporal Variations in Organohalogenated Contaminants and Associated Thyroid Hormone Responses in Two Arctic Glaucous Gull (Larus hyperboreus) Populations
(Master thesis, 2021)Polyklorerte bifenyler (PCBs), organiske klorerte pesticider (OCPer), og per- og polyfluorerte stoffer (PFASer) er persistente organiske forurensninger (POPer) som finnes i det uberørte Arktis, til tross for at produksjonen ... -
Temporally replicated DNA methylation patterns in great tit using reduced representation bisulfite sequencing
(Journal article; Peer reviewed, 2019)Seasonal timing of reproduction is an important fitness trait in many plants and animals but the underlying molecular mechanism for this trait is poorly known. DNA methylation is known to affect timing of reproduction in ... -
Ten simple rules to run a successful BioHackathon
(Peer reviewed; Journal article, 2020) -
Tentacle Morphological Variation Coincides with Differential Expression of Toxins in Sea Anemones
(Journal article; Peer reviewed, 2021)Phylum Cnidaria is an ancient venomous group defined by the presence of cnidae, specialised organelles that serve as venom delivery systems. The distribution of cnidae across the body plan is linked to regionalisation of ... -
Territoriality and nest competition in the two-spotted goby (Pomatoschistus flavescens)
(Master thesis, 2019)Intra-sexual competition plays an important role in the evolutionary process of sexual selection. Male-male competition over resources that are essential for mating success may prevent unsuccessful competitors from breeding. ... -
Testing Behavioral Ecology Models with Historical Individual-Based Human Demographic Data from Norway
(Doctoral thesis at NTNU;2015:13, Doctoral thesis, 2015)Behavior varies widely among animals, both within and between species. An evolutionary perspective may help us understand the origin of this diversity. Behavioral ecology models seek to explain much of variation in ... -
Testing microplastics as a potential shuttle for toxic elements in the marine environment
(Master thesis, 2023)Studien om samspillet mellom mikroplast og sporstoffer har vakt oppmerksomhet blant forskere som mikroplast og skadelige metaller i vannmiljøet er allestedsnærværende, og blir en alvorlig trussel mot det marine økosystemet, ... -
Testing species boundaries in Scandinavian specimens of Nomada flavoguttata (Kirby, 1802) using an integrative approach
(Master thesis, 2023)Kleptoparasittiske bier utgjør omtrent 13% av alle verdens biearter. Deres spesialiserte økologi gjør at de er gode indikatorer på tilstanden i terrestriske økosystemer. Nomada er den største slekten av kleptoparasitiske ... -
Testing species boundaries in the Phyllobius pyri- vespertinus species complex using an integrative approach
(Master thesis, 2023)Phyllobius vespertinus (Fabricius, 1792) and Phyllobius pyri (Linnaeus, 1758) (Coleoptera, Curculionidae) er to bredsnute biller hvor P. vespertinus nylig har blitt betraktet som synonym til P. pyri. Artsstatusen til P. ... -
Testing the importance of jasmonate signalling in induction of plant defences upon cabbage aphid (Brevicoryne brassicae) attack
(Journal article; Peer reviewed, 2011)Background Phloem-feeding aphids deprive plants of assimilates, but mostly manage to avoid causing the mechanical tissue damage inflicted by chewing insects. Nevertheless, jasmonate signalling that is induced by infestation ... -
Testing variation in recruitment of dwarfs and cannibals in populations of Arctic char (Salvelinus alpinus) at Bear Island
(Master thesis, 2020)Sammendrag 1. Røye (Salvelinus alpinus) er den ferskvannsfisken med nordligst utbredelse, og er ofte den eneste fiskearten til stede i mange subarktiske og arktiske innsjøer. Røyepopulasjoner i disse områdene, og spesielt ... -
Testosterone and persistent organic pollutants in East Greenland male polar bears (Ursus maritimus)
(Peer reviewed; Journal article, 2023)Legacy persistent organic pollutants (POPs) such as polychlorinated biphenyls (PCBs) are chemicals that undergo long-range transport to the Arctic. These chemicals possess endocrine disruptive properties raising concerns ... -
Tests of the Marginal Value Theorem in diving bouts of foraging trips in pairs of breeding European shag (Phalacrocorax aristotelis)
(Master thesis, 2019)I denne avhandlingen ble tilpasninger av Marginal Value Theorem testet ved bruk av data fra 46.103 dykk av 39 par toppskarv (Phalacrocorax aristotelis) innsamlet over 6 år, med hensyn til fuglers respiratorisk fysiologi ... -
TFCheckpoint database update, a cross-referencing system for transcription factors from human, mouse and rat
(Journal article; Peer reviewed, 2023)Prior knowledge about DNA-binding transcription factors (dbTFs), transcription co-regulators (coTFs) and general transcriptional factors (GTFs) is crucial for the study and understanding of the regulation of transcription. ... -
The Accumulation of Trace Metals in Rodent Tissues along the TAZAMA Pipeline and TANZAM Highway in MINAPA, Tanzania.
(Master thesis, 2018)Small mammalian species, specifically rodents, have been used as bioindicators in estimating the level and magnitude of disturbances caused by anthropogenic activities in the environments. Herein, several toxic compounds ... -
The advective origin of an under-ice spring bloom in the Arctic Ocean using multiple observational platforms
(Journal article; Peer reviewed, 2018)Under-ice blooms of phytoplankton in the Chukchi Sea have been observed, with strong implications for our understanding of the production regimes in the Arctic Ocean. Using a combination of satellite remote sensing of ... -
The Arabidopsis leucine-rich repeat receptor kinase MIK2/LRR-KISS connects cell wall integrity sensing, root growth and response to abiotic and biotic stresses.
(Journal article; Peer reviewed, 2017)Plants actively perceive and respond to perturbations in their cell walls which arise during growth, biotic and abiotic stresses. However, few components involved in plant cell wall integrity sensing have been described ...