Browsing NTNU Open by Author "Båtnes, Anna Solvang"
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Biofouling on salmon pen nets and cleaner fish shelters does not harbor planktonic stages of sea lice
Jevne, Lone Sunniva; Øvrelid, Margrete Slåtsve; Hagemann, Andreas; Bloecher, Nina; Steinhovden, Kristine; Båtnes, Anna Solvang; Olsen, Yngvar; Reitan, Kjell Inge (Peer reviewed; Journal article, 2020)The objective of the current study was to determine the extent to which planktonic sea lice (Lepeophtheirus salmonis Krøyer, 1838 and Caligus elongatus Nordmann, 1832) were present in the biofouling on open-sea net pens ... -
Delousing Effect and Welfare Implications of Non-Medicinal Delousing Methods
Middelthon, Martine (Master thesis, 2023)Lakselusen (Lepeophtheirus salmonis) er en parasitt som påvirker velferden til atlanterhavslaksen. De siste årene har det vært økende interesse for å bruke ikke-medikamentelle metoder for å bekjempe lus, men disse behandlingene ... -
Egg string hatching success, development to copepodids and tolerance to low salinities in salmon lice (Lepeophtheirus salmonis) as a consequence of freshwater delousing
Hansen, Sondre Strand (Master thesis, 2022)Lakselus (Lepeophtheirus salmonis) er en hovedgrunnene til at veksten har stangnert i havbruksnæringen. Flere nye metoder for å kontrollere luseinfestasjon har blitt utviklet, og en av disse er ferskvannsbehandlinger ved ... -
Fate of Lepeophtheirus salmonis and Caligus elongatus During Farmed Salmon Crowding
Nersten, Marit (Master thesis, 2021)Økt reproduksjon og spredning av Lepeophtheirus salmonis og Caligus elongatus hindrer videre vekst i oppdrettsnæringen og truer den naturlige bestanden av villaks. Trenging vil si å øke tettheten av fisken og er en viktig ... -
IIb-RAD-sequencing coupled with random forest classification indicates regional population structuring and sex-specific differentiation in salmon lice (Lepeophtheirus salmonis)
Guragain, Prashanna; Båtnes, Anna Solvang; Zobolas, John; Olsen, Yngvar; Bones, Atle M.; Winge, Per (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, ... -
Inferences of genetic architecture of bill morphology in house sparrow using a high-density SNP array point to a polygenic basis
Lundregan, Sarah; Hagen, Ingerid Julie; Gohli, Jostein; Niskanen, Alina Katariina; Kemppainen, Petri; Ringsby, Thor Harald; Kvalnes, Thomas; Pärn, Henrik; Rønning, Bernt; Holand, Håkon; Ranke, Peter Sjolte; Båtnes, Anna Solvang; Selvik, Linn-Karina M.; Lien, Sigbjørn; Sæther, Bernt-Erik; Husby, Arild; Jensen, Henrik (Journal article; Peer reviewed, 2018)Understanding the genetic architecture of quantitative traits can provide insights into the mechanisms driving phenotypic evolution. Bill morphology is an ecologically important and phenotypically variable trait, which is ... -
Investigation of shortened sea phase effect on salmon lice
Karlsen, Camilla (Master thesis, 2021)Lakselus (Leopeohtheirus salmonis) er en parasitt som påfører store økonomiske og økologiske konsekvenser for havbruksnæringen. I forsøk på å få kontroll over lakselusen tester oppdrettsnæringen ut ulike metoder og ... -
Light in the dark – the role of irradiance in the high Arctic marine ecosystem during polar night
Båtnes, Anna Solvang (Doktoravhandlinger ved NTNU, 1503-8181; 2013:151, Doctoral thesis, 2013)In this thesis, I studied the role of light in the Arctic marine ecosystem during the polar night; a time of year when it appears completely dark to the human eye. I have studied patterns of diel vertical migration (DVM) ... -
Phenylalanine Hydroxylase RNAi Knockdown Negatively Affects Larval Development, Molting and Swimming Performance of Salmon Lice
Guragain, Prashanna; Sporsheim, Bjørnar; Skjesol, Astrid; Båtnes, Anna Solvang; Olsen, Yngvar; Bones, Atle M.; Winge, Per (Peer reviewed; Journal article, 2020)Phenylalanine hydroxylase (PAH) is a crucial enzyme involved in tyrosine biosynthesis, having roles in neurological and physiological processes. The purpose of PAH has received little attention in crustaceans despite ... -
Planktonic and Parasitic Sea Lice Abundance on Three Commercial Salmon Farms in Norway Throughout a Production Cycle
Jevne, Lone Sunniva; Guttu, Ane Maria; Båtnes, Anna Solvang; Olsen, Yngvar; Reitan, Kjell Inge (Peer reviewed; Journal article, 2021)The present article reports the densities of planktonic sea lice (Lepeophtheirus salmonis and Caligus elongatus) in three Atlantic salmon (Salmo salar) localities, and the relationship between the abundance of adult sea ... -
Principles and Methods of Counteracting Harmful Salmon–Arthropod Interactions in Salmon Farming: Addressing Possibilities, Limitations, and Future Options
Guragain, Prashanna; Tkachov, Max; Båtnes, Anna Solvang; Olsen, Yngvar; Winge, Per; Bones, Atle M. (Peer reviewed; Journal article, 2021)The arthropod salmon louse (Lepeophtheirus salmonis) is a major threat to Atlantic salmon aquaculture and wild salmonids. Essentially like in monoculture, very high concentrations of susceptible hosts may result in high ... -
Sammenlikning av mekanisk og termisk avlusing: Klekkesuksess og larveutvikling fra eggstrenger med vurdering av smittepotensial hos lakselus (Lepeophtheirus salmonis)
Furberg, Mikael Hansen (Master thesis, 2022)Norsk lakseoppdrett har hatt en god økonomisk og produksjonsmessig vekst siden 2000-tallet. De siste årene har produksjonen likevel stagnert på grunn av utfordringer med lakselus (Lepeophtheirus salmonis Krøyer, 1837). ... -
Sea lice (Lepeophtheirus salmonis and Caligus elongatus) during freshwater treatment
Gaasø, Maria (Master thesis, 2019)Siden begynnelsen på 1960-tallet, har lus vært et problem for fiskevelferden for akvakultur næringen i Norge. Lusen har en større økonomisk påvirkning enn noen annen parasitt, og Lepeophteirus salmonis har blitt indentifisert ... -
The usability of eDNA to identify and quantify zooplankton communities
Svendsen, Thea (Master thesis, 2023)Havet vårt står midt i en trippel planetarisk krise. Klimaendringer, forurensning og tap av biologisk mangfold påvirker både habitater og de som bor der. Havovervåkingsprogrammer er viktige siden de gir data som kan bidra ... -
Variability in Calanus spp. abundance on fine- to mesoscales in an Arctic fjord: implications for little auk feeding
Vogedes, Daniel Ludwig; Eiane, Ketil; Båtnes, Anna Solvang; Berge, Jørgen (Journal article; Peer reviewed, 2014)We studied the abundance of calanoid copepods of the genus Calanus in a high-resolution sampling grid located in the vicinity of a breeding colony of an avian Calanus predator, the little auk (Alle alle) in an Arctic fjord ...