Blar i Institutt for biologi på tittel
Viser treff 1863-1882 av 2612
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Polygalacturonase-inhibiting protein (PGIP) in cultivatedstrawberry (Fragaria x ananassa) : characterisation and induction of the gene following fruit infection by Botrytis cinerea
(Doktoravhandlinger ved NTNU, 1503-8181; 2004:153, Doctoral thesis, 2004)Polygalacturonase-inhibiting proteins (PGIPs) have been demonstrated to play a role in host defense in several plants. The PGIP now cloned from strawberry (Fragaria × ananassa) showed a high degree of homology to other ... -
Population analysis and structure and RNA interference to understand salmon lice biology and a review of the principles of controlling infestation in aquaculture facilities
(Doctoral theses at NTNU;2022:232, Doctoral thesis, 2022)The arthropod salmon louse (Lepeophtheirus salmonis) is a significant hazard to aquaculture and to the wild Atlantic salmon. In a monoculture environment, very high host densities may result in rapid reproduction and in ... -
Population characteristics and estimates of effective population size in a house sparrow metapopulation
(Master thesis, 2011)Effective population size (Ne) is a fundamental concept within biology and can be defined as the size of an ideal Wright-Fisher population in which the rate of genetic drift is the same as in the observed population. Natural ... -
Population dynamics and resting egg production in Daphnia: Interactive effects of mercury, population density and temperature
(Peer reviewed; Journal article, 2021)Toxicity studies on freshwater organisms are commonly conducted by quantifying effects on asexual (clonal) reproductive rates in Daphnia, whereas studies of effects on sexual reproductive rates remain relatively rare. ... -
Population dynamics in white-tailed eagle at an on-shore wind farm area in coastal Norway
(Doktoravhandlinger ved NTNU, 1503-8181; 2014:231, Doctoral thesis, 2014)Collision with turbines and disturbance leading to loss of or reduced habitat quality are the two main impacts from wind energy development on birds. In addition, wind farms can act as barriers to birds. The conflict between ... -
Population dynamics under climate change ad harvesting: Results from the high Arctic Svalbard reindeer
(Doctoral theses at NTNU;2019:268, Doctoral thesis, 2019)To prevent populations or species extinctions due to anthropogenic global change, we need a better mechanistic understanding of the interplay between intrinsic (e.g. resource competition, demographic structure) and extrinsic ... -
Population Ecology of Eriophorum latifolium, a Clonal Species in Rich Fen Vegetation
(Doktoravhandlinger ved NTNU, 1503-8181; 2010:179, Doctoral thesis, 2010) -
Population Genetic Study of Carex jemtlandica and C. lepidocarpa sect. Ceratocystis (Cyperaceae), using RAD-seq
(Master thesis, 2016)Carex L. sect. Ceratocystis Dumort. is a small, presumably young, distinct evolutionary entity of the sedge family (Cyperaceae Juss.) known for its internally problematic taxonomy and complex morphology. For instance, there ... -
The population genomic legacy of the second plague pandemic
(Peer reviewed; Journal article, 2022)Human populations have been shaped by catastrophes that may have left long-lasting signatures in their genomes. One notable example is the second plague pandemic that entered Europe in ca. 1,347 CE and repeatedly returned ... -
Population regulation in the tadpole shrimp Lepidurus arcticus
(Master thesis, 2012)A metapopulation consists of several subpopulations that show limited degree of internal regulation, and are not viable alone in the long term. Instead, each subpopulation is sustained over time by migration and re-colonization ... -
Population responses to harvesting in fluctuating environments
(Peer reviewed; Journal article, 2021)Achieving sustainable harvesting of natural populations depends on our ability to predict population responses to the combined effects of harvesting and environmental fluctuations while accounting for other internal and ... -
Population trend of Periphylla periphylla in inner Trondheimsfjord
(Master thesis, 2012)Periphylla periphylla (Scyphozoa, Coronatae) is a deep sea jellyfish first described by Péron & Lesueur in 1809. It is distributed in all of the world s oceans except for the Arctic. P. periphylla avoids light and is well ... -
Portable Catamaran Drone - an uncrewed sampling vehicle for micro-plastics and aquaculture research
(Chapter, 2022)In this paper, we present a Portable Catamaran Drone (PCD) - an Uncrewed Surface Vehicle (USV) that may significantly improve the scalability of surface water particle sampling using a plankton net. We preset vehicle design ... -
Possibility for strong northern hemisphere high-latitude cooling under negative emissions
(Peer reviewed; Journal article, 2022)It is well established that a collapse or strong reduction of the Atlantic meridional overturning circulation (AMOC) would substantially cool the northern high latitudes. Here we show that there is a possibility that such ... -
Possible Anthropogenic Sources of Toxic Elements in Snow Bunting Nestlings (Plectrophenax nivalis) in Adventdalen, Svalbard.
(Master thesis, 2017)The Arctic environment is exposed to natural and anthropogenic contamination as a result of local, regional and global pollution. Contaminants accumulating in the Arctic may influence both biotic and abiotic factors. ... -
Possible Effects of Persistent Organic Pollutants on Steroid Hormone Homeostasis in House Sparrows (Passer domesticus) from Helgeland, Norway
(Master thesis, 2014)Over the last decades, declines have occurred in the range and abundance of several passerines and farmland bird species and even though several possible causes have been suggested, the exposure to environmental contaminants ... -
Post-copulatory opportunities for sperm competition and cryptic female choice provide no offspring fitness benefits in externally fertilizing salmon
(Journal article; Peer reviewed, 2016)There is increasing evidence that females can somehow improve their offspring fitness by mating with multiple males, but we understand little about the exact stage(s) at which such benefits are gained. Here, we measure ... -
Potensialet for utvidet kontroll av vannkvalitet og fiskevelferdi i RAS ved bruk av maskinlæring
(Bachelor thesis, 2023)Innenfor landbasert lakseoppdrett benyttes resirkulerende akvakultursystemer for å gjenbruke driftsvannet flere ganger. Fiskens metabolisme og fôring produserer avfallsstoffer som kan forårsake redusert vannkvalitet i ... -
Potential of the polychaete Hediste diversicolor fed on aquaculture and biogas side streams as an aquaculture food source
(Journal article; Peer reviewed, 2019)We evaluated the potential of the marine bristleworm Hediste diversicolor (Polychaeta) to recycle side streams from aquaculture and biogas production. Polychaetes were fed along a gradient from pure aquaculture sludge (SS) ... -
Potentiation of ecological factors on the disruption of thyroid hormones by organo-halogenated contaminants in female polar bears (Ursus maritimus) from the Barents Sea.
(Journal article; Peer reviewed, 2017)As apex predators, polar bears (Ursus maritimus) are among the most heavily polluted organisms in the Arctic. In addition to this anthropogenic stressor, climate warming has been shown to negatively affect their body ...