Browsing Faculty of Mathematics and Natural Sciences by Title
Now showing items 7720-7739 of 9919
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Salmon lice sampled from wild Atlantic salmon and sea trout throughout Norway display high frequencies of the genotype Associated with pyrethroid resistance
(Peer reviewed; Journal article, 2019)Atlantic salmon Salmo salar aquaculture is based on the use of open-pen sea cages, with the consequence that farmed fish are both recipients and sources of pathogens from surrounding waters. Currently, the parasitic salmon ... -
Salmon lice survive the straight shooter: A commercial scale sea cage trial of laser delousing
(Journal article; Peer reviewed, 2020)Ectoparasitic salmon louse (Lepeophtheirus salmonis) infestations are costly for Atlantic salmon (Salmo salar) farmers in Norway. As a result, there is a strong desire for solutions to prevent and control infestations, and ... -
Salmon louse (Lepeophtheirus salmonis) transcriptomes during post molting maturation and egg production, revealed using EST-sequencing and microarray analysis
(Peer reviewed; Journal article, 2008-03-10)Background Lepeophtheirus salmonis is an ectoparasitic copepod feeding on skin, mucus and blood from salmonid hosts. Initial analysis of EST sequences from pre adult and adult stages of L. salmonis revealed a large proportion ... -
The salmon louse genome may be much larger than sequencing suggests
(Journal article; Peer reviewed, 2022)The genome size of organisms impacts their evolution and biology and is often assumed to be characteristic of a species. Here we present the first published estimates of genome size of the ecologically and economically ... -
The salmon louse genome: Copepod features and parasitic adaptations
(Journal article; Peer reviewed, 2021)Copepods encompass numerous ecological roles including parasites, detrivores and phytoplankton grazers. Nonetheless, copepod genome assemblies remain scarce. Lepeophtheirus salmonis is an economically and ecologically ... -
Salmon louse labial gland enzymes: implications for host settlement and immune modulation
(Journal article; Peer reviewed, 2024)Salmon louse (Lepeophtheirus salmonis) is a skin- and blood-feeding ectoparasite, infesting salmonids. While feeding, labial gland proteins from the salmon louse may be deposited on the Atlantic salmon (Salmo salar) skin. ... -
The salmon louse larval black box: evaluating fecundity and enumerating planktonic stages with an aquaculture management perspective
(Doctoral thesis, 2022-06-17)Modern salmon aquaculture began in 1970 with the innovation of at-sea fish pens which precipitated a rapid growth in production. The expansion of the industry and increased number of farmed fish concentrated within the ... -
The salmon louse Lepeophtheirus salmonis (Copepoda: Caligidae) life cycle has only two chalimus stages
(Peer reviewed; Journal article, 2013-09-12)Each year the salmon louse (Lepeophtheirus salmonis Krøyer, 1838) causes multi-million dollar commercial losses to the salmon farming industry world-wide, and strict lice control regimes have been put in place to reduce ... -
Salmonid fish: model organisms to study cardiovascular morphogenesis in conjoined twins?
(Peer reviewed; Journal article, 2016-07-16)Background: There is a gap in knowledge regarding the cardiovascular system in fish conjoined twins, and regarding the cardiovascular morphogenesis of conjoined twins in general. We examined the cardiovascular system in a ... -
Salmoxcellia vastator n. gen., n. sp. i regnbueørret og laks: - vevstropisme, patologi, diagnostikk og spredning
(Master thesis, 2022-10-31) -
Salt decollement and rift inheritance controls on crustal deformation in orogens
(Journal article; Peer reviewed, 2019-09)We investigate the factors that control the shortening distribution and its evolution through time in orogenic belts using numerical models. We present self‐consistent high‐resolution numerical models that simulate the ... -
Sammenheng mellom løsningsegenskaper, grenseflatespenning og retensjon for et kommersielt surfaktantsystem
(Master thesis, 2014-05-30)For å oppnå en suksessfull surfaktantflømming i økt oljeutvinning, ønsker man generelt å injisere en surfaktantløsning som har gode løsningsegenskaper, reduserer grenseflatespenning mellom vann og olje effektivt, og som ... -
Sammenhenger mellom koder, matroider, grafer og simplisielle komplekser
(Master thesis, 2008)Denne masteroppgaven handler hovedsakelig om å studere sammenhenger mellom ulike em- ner innen algebra og kombinatorikk. De matematiske konseptene som studeres, er lineære koder, matroider, grafer og simplisielle komplekser, ... -
En sammenligning av NMRL-data og konvensjonelle loggemetoder fra Trollfeltet
(Master thesis, 2009-04-27)Logger kan grupperes etter hvilke ønskede reservoarparametrene disse registrerer. Loggemetoder undersøkt i denne oppgaven kan deles inn i tre kategorier: o Litologiske logger: Gammaloggen o Porøsitetslogger: Tetthetsloggen ... -
Sammenligning av spredningsmodellering med kodene PHAST og FLACS, for “tyngre en luft” gassjeter med horisontalt sammenstøt, og valideringssimuleringer av MUST forsøkene.
(Master thesis, 2011-01-20)Denne rapporten er et arbeid som sammenligner to dataverktøy, PHAST og FLACS vedrørende ulike spredningsscenarier for fluider, først og fremst tung-gassutslipp. Det er utført en rekke simuleringer som ligger til grunn for ... -
Sammenligning av to varianter av infeksiøs pankreasnekrose-virus – sekvensanalyser og immunresponser
(Master thesis, 2022-06-01)Virussykdommer har vært et stort problem i oppdrettsnæringen. Kunnskap om interaksjonene mellom virus og vert er viktig for å forstå hvordan virus kan gi sykdom, og hvilke mekanismer som spiller inn. Infeksiøs pankreasne ... -
Sampling error distribution for the ensemble Kalman filter update step
(Peer reviewed; Journal article, 2012)In recent years, data assimilation techniques have been applied to an increasingly wider specter of problems. Monte Carlo variants of the Kalman filter, in particular, the ensemble Kalman filter (EnKF), have gained significant ... -
Samtalekvalitet, strategier og forståelse i arbeid med Elevgenererte eksempler
(Master thesis, 2019-06-22)Jeg har forsket på Elevgenererte eksempler som didaktisk tilnærming i trigonometri i 2 klasser på videregående skole. I den forbindelse har jeg analysert datamaterialet mitt for samtalekvalitet, strategier og forståelse ... -
Samtaletrekk i forbindelse med progresjon i forståelse i matematikk
(Master thesis, 2020-06-25) -
Sand textural control on shear-enhanced compaction bands in poorly-lithified sandstone
(Peer reviewed; Journal article, 2014)Sand textural control on SECB (shear-enhanced compaction band) formation is analyzed combining field observations, detailed material characterization and mechanical testing for poorly lithified sandstone units in Provence ...