Browsing Institutt for biologi by Title
Now showing items 1204-1223 of 2612
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Hydrogen cyanide, a key plant defense, as a potential driver of root-associated nematode communities along urbanization gradients
(Peer reviewed; Journal article, 2023)Introduction: Plant chemical defenses can influence the distribution, community composition, and abundance of soil biota. Urbanization plays a key role in shaping soil biotic communities either directly through changes in ... -
Hydrology influences breeding time in the white‑throated dipper
(Peer reviewed; Journal article, 2020)Background: Earlier breeding is one of the strongest responses to global change in birds and is a key factor determining reproductive success. In most studies of climate effects, the focus has been on large-scale environmental ... -
Hydrolysis activity of pyloric cecal enterocytes of brown trout (Salmo trutta) toward monoacylglycerol and lysophosphatidylcholine
(Journal article; Peer reviewed, 2018)Some lipid digestion pathways in fish deviate from those in mammals, and many differences may also be species dependent. This report describes a pathway for monoacylglycerol (MAG) and lysophospholipid absorption by intestinal ... -
Hydropeaking Effects on Riverine Benthic Invertebrate Fauna Composition and Drift
(Master thesis, 2015)In earlier studies, changes have been detected in the composition of the lotic benthic macroinvertebrate fauna as a consequence of hydropeaking. Rapid fluctuations in discharge lead to sudden dewatering of river bed area ... -
Hyperspectral imaging as an emerging tool to analyze microplastics: A systematic review and recommendations for future development
(Peer reviewed; Journal article, 2021)A central challenge in microplastics (MP, diameter < 5 mm) research is the analysis of small plastic particles in an efficient manner. This review focuses on the recent application of infrared hyperspectral imaging (HSI) ... -
HYPSO-1 CubeSat: First Images and In-Orbit Characterization
(Peer reviewed; Journal article, 2023)The HYPSO-1 satellite, a 6U CubeSat carrying a hyperspectral imager, was launched on 13 January 2022, with the Goal of imaging ocean color in support of marine research. This article describes the development and current ... -
Hyraxes and humans in Serengeti National Park - flight initiation distance and demography
(Master thesis, 2015)Menneskelig aktivitet er en kilde til forstyrrelser for de fleste dyr, som reagerer med en rekke atferdsmessige responser e.g. økt antipredator atferd eller relokalisering til et nytt område, ofte med kostnader som påvirker ... -
Identification and population genetic analysis of jellyfish blooms in Trondheimsfjord Role of polyps in jellyfish populations connectivity
(Master thesis, 2021)There is a strong need to utilize jellyfish biomass in both economic and ecological way. These two aspects rely on the capability of jellyfish to bloom in large quantities and on accurate prediction on where and when ... -
Identification of a candidate dwarfing gene in Pallas, the first commercial barley cultivar generated through mutational breeding
(Peer reviewed; Journal article, 2023)Many induced mutants are available in barley (Hordeum vulgare L.). One of the largest groups of induced mutants is the Erectoides (ert) mutants, which is characterized by a compact and upright spike and a shortened culm. ... -
Identification of different antennal-lobe neuron categories;: a morphological and physiological study of second order neurons in the primary olfactory brain centre of the moth Heliothis virescens
(Master thesis, 2014)Olfaction is the sense of smell, first mediated by specialized sensory cells in the sensilla hair covering the moth antennae, projecting to the primary olfactory centre the antennal lobe. From this first synaptic level the ... -
Identification of Marine Organisms using Chemotaxonomy and Hyperspectral Imaging
(Doktoravhandlinger ved NTNU, 1503-8181; 2013:292, Doctoral thesis, 2013)In this study, pigment composition in marine organisms has been investigated for different purposes. The absorption spectra of pigments from a given organism give us an optical fingerprint for that particular organism when ... -
Identification of tolerance levels on the coldwater coral Desmophyllum pertusum (Lophelia pertusa) from realistic exposure conditions to suspended bentonite, barite and drill cutting particles
(Peer reviewed; Journal article, 2022)Cold-water coral (CWC) reefs are numerous and widespread along the Norwegian continental shelf where oil and gas industry operate. Uncertainties exist regarding their impacts from operational discharges to drilling. Effect ... -
Identification, mapping, and photobiology of Arctic macro- and microalgae using ROV-UHI
(Doctoral theses at NTNU;2024:237, Doctoral thesis, 2024)This thesis comprises firstly of method development, using a newly developed remotely operated vehicle carrying an underwater hyperspectral imaging camera (mini-ROV-UHI) for identification and mapping of brown, green and ... -
Identifikasjon av ukjente legemidler og misbruksstoffer ved spektersøk på GCMS ved bruk av deconvolution software
(Master thesis, 2009)Hensikt og problemstilling: Gasskromatografi-massespektrometri (GCMS) brukes ofte i laboratorier som utfører toksikologisk screening etter legemidler, giftstoffer og misbruksstoffer i biologiske prøver. Det kan imidlertid ... -
Identifying Conservative Criteria for (environmental) Assessments of Vulnerability;: Seabirds and Offshore Wind Farms as a Case Study
(Master thesis, 2013)The approach is based on four criterias; 1) elasticity of adult and juvenile survival on population growth rate, 2) redlist status and 3) local abundances and 4) flight properties. I also investigated whether the different ... -
IIb-RAD-sequencing coupled with random forest classification indicates regional population structuring and sex-specific differentiation in salmon lice (Lepeophtheirus salmonis)
(Peer reviewed; Journal article, 2022)The aquaculture industry has been dealing with salmon lice problems forming serious threats to salmonid farming. Several treatment approaches have been used to control the parasite. Treatment effectiveness must be optimized, ... -
IL-1β og TNF-α indusert genuttrykk av DKK1 og OPG involverer cPLA2-IVα i SW-982 synoviocytter
(Master thesis, 2011)I denne studien har det blitt sett nærmere på cPLA2 sin rolle i reguleringen av signalsporene RANK/RANKL/OPG signalsystemet og Wnt-signalisering ved å detektere og kvantifisere genuttrykket av reseptor aktivator av nukleær ... -
Illustrating the Potential of Ulva sp.: Development of an Explorative Model for the Multiculture of Ulva sp. and Littorina littorea in a Recirculating Aquaculture System (RAS) Waste Stream
(Master thesis, 2022)The cultivation of seaweed species in fishpond effluent, characterized by high ammonium concentrations, has shown to successful and often high removal efficiencies can be attained. However, the high nitrate concentration ... -
The imaging of guard cells of thioglucosidase (tgg) mutants of Arabidopsis further links plant chemical defence systems with physical defence barriers
(Journal article; Peer reviewed, 2021)The glucosinolate-myrosinase system is a well-known plant chemical defence system. Two functional myrosinase-encoding genes, THIOGLUCOSIDASE 1 (TGG1) and THIOGLUCOSIDASE 2 (TGG2), express in aerial tissues of Arabidopsis. ... -
Immigration counter-acts local micro-evolution of a major fitness component: migration-selection balance in free-living song sparrows
(Peer reviewed; Journal article, 2021)Ongoing adaptive evolution, and resulting “evolutionary rescue” of declining populations, requires additive genetic variation in fitness. Such variation can be increased by gene flow resulting from immigration, potentially ...