Browsing Department of Biological Sciences by Title
Now showing items 2429-2448 of 2558
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Trichlorfon, a salmon lice pesticide, and the effect on metabolism and inflammation in Atlantic salmon (Salmo salar, L.)
(Master thesis, 2020-06-26)Since the beginning of the salmon farming industry in Norway, the substantial fish health and welfare and economic costs caused by the parasitic salmon lice (Lepeophtheirus salmonis) has increased in tandem with the expanding ... -
Triploid atlantic salmon (Salmo salar L.) postsmolts accumulate prevalence more slowly than diploid salmon following bath challenge with salmonid alphavirus subtype 3
(Peer reviewed; Journal article, 2017-04-12)Triploid Atlantic salmon (Salmo salar L.) may play an important role in the sustainable expansion of the Norwegian aquaculture industry. Therefore, the susceptibility of triploid salmon to common infections such as salmonid ... -
Triploid Atlantic salmon and triploid Atlantic salmon × brown trout hybrids have better freshwater and early seawater growth than diploid counterparts
(Journal article; Peer reviewed, 2021)The use of reproductively sterile triploid salmonids would enhance the environmental sustainability of the aquaculture industry by preventing genetic exchange between escapees and wild conspecifics. To this end, we assessed ... -
Triploid induction in Atlantic cod (Gadus morhua L.) by the use of different pressure levels
(Master thesis, 2011-10-31)In the present experiment, different levels of pressure were investigated to see if it was possible to induce triploidy at a lower pressure level than previously used for Atlantic cod (Gadus morhua). Newly fertilized eggs ... -
Triploidisering av Atlantisk torsk (Gadus morhua); effekt av varierende hydrostatisk trykk og trykktidspunkt på triploiditet, samt konsekvenser for utvikling.
(Master thesis, 2013-10-31)Flere av utfordringene i norsk torskeoppdrett, er direkte eller delvis knyttet opp mot fiskens kjønnsmodningsfase. Kjønnsmodning fører blant annet til redusert appetitt og vekt, dårligere filetkvalitet samt høyere dødelighet. ... -
Triploidy leads to a mismatch of smoltification biomarkers in the gill and differences in the optimal salinity for post-smolt growth in Atlantic salmon
(Journal article; Peer reviewed, 2022)Sterile triploid Atlantic salmon (Salmo salar) show inconsistent seawater grow-out, but the reason why remains unclear. The purpose of this study was to determine the salinity optima of triploid post-smolts. Diploids and ... -
Trofiske interaksjoner mellom appendicularia (halesekkdyr) og marine virus – konsekvens for virus diversitet, spredning og persistens.
(Master thesis, 2018-09-01)The appendicularian Oikopleura dioica (Chordata:Tunicata) is a mesozooplanktonic marine organism that utilizes a gelatinous house to effectively trap microscopic particles from seawater. Earlier observations of the ... -
Trophic interactions and abiotic factors drive functional and phylogenetic structure of vertebrate herbivore communities across the Arctic tundra biome
(Peer reviewed; Journal article, 2019)Communities are assembled from species that evolve or colonise a given geographic region, and persist in the face of abiotic conditions and interactions with other species. The evolutionary and colonisation histories of ... -
Trophic structure of mesopelagic species in the Northeast Atlantic Ocean based on stable isotopes of carbon and nitrogen
(Master thesis, 2021-09-03)The mesopelagic zone is one of the largest, yet among the least explored habitats of the planet. Possible estimates of fish living in this zone range from around 1 to 15 billon tones of biomass which is 10 to 15 times that ... -
Tsv-N1: A novel DNA algal virus that infects tetraselmis striata
(Peer reviewed; Journal article, 2015-07-17)Numbering in excess of 10 million per milliliter of water, it is now undisputed that aquatic viruses are one of the major factors shaping the ecology and evolution of Earth’s microbial world. Nonetheless, environmental ... -
Tuning and Development of an Individual-Based Model of the Herring Spawning Migration
(Journal article; Peer reviewed, 2022-01-13)Norwegian spring spawning herring is a migratory pelagic fish stock that seasonally navigates between distant locations in the Norwegian Sea. The spawning migration takes place between late winter and early spring. In this ... -
Two apolipoproteins in salmon louse (Lepeophtheirus salmonis), apolipoprotein 1 knock down reduces reproductive capacity
(Journal article; Peer reviewed, 2021)The salmon louse, Lepeophtheirus salmonis is an ectoparasite of salmonid fish in the Northern Hemisphere, causing large economical losses in the aquaculture industry and represent a threat to wild populations of salmonids. ... -
Two homologous neutrophil serine proteases bind to POPC vesicles with different affinities: When aromatic amino acids matter
(Peer reviewed; Journal article, 2014-12)Neutrophil serine proteases Proteinase 3 (PR3) and human neutrophil elastase (HNE) are homologous antibiotic serine proteases of the polymorphonuclear neutrophils. Despite sharing a 56% sequence identity they have been ... -
Two hundred years of zooplankton vertical migration research
(Journal article; Peer reviewed, 2021)Vertical migration is a geographically and taxonomically widespread behaviour among zooplankton that spans across diel and seasonal timescales. The shorter-term diel vertical migration (DVM) has a periodicity of up to 1 ... -
Two new cryptic and sympatric species of the king crab parasite Briarosaccus (Cirripedia: Rhizocephala) in the North Pacific
(Peer reviewed; Journal article, 2016-01-05)Rhizocephalan barnacles have been reported to parasitize a wide range of king crab species (Lithodidae). So far all these parasites have been assigned to a single species, Briarosaccus callosus Boschma, 1930, which is ... -
The two-step development of a duplex retina involves distinct events of cone and rod neurogenesis and differentiation
(Peer reviewed; Journal article, 2016-08)Unlike in mammals, persistent postembryonic retinal growth is a characteristic feature of fish, which includes major remodeling events that affect all cell types including photoreceptors. Consequently, visual capabilities ... -
Ulike interesser på ulike trinn? - En komparativ studie av elevers interesse for å lære biologi, med fokus på elevtyper, klasser og trinn
(Master thesis, 2020-06-18)Denne masteroppgaven har som formål å undersøke og beskrive elevers interesse for å lære biologi ved å benytte klyngeanalyse til å identifisere elevtyper. Oppgaven bruker et kvantitativt forskningsdesign med spørreskjema ... -
Ultrastructure of the anterior organ and posteriorfunnel-shaped canal of Gyrocotyle urna Wagener, 1852(Cestoda: Gyrocotylidea)
(Peer reviewed; Journal article, 2015-05-22)Using scanning and transmission electron microscopy, ultrastructure of the anterior organ and posterior funnel-shaped canal of Gyrocotyle urna Wagener, 1852 (Cestoda: Gyrocotylidea) from ratfish, Chimaera monstrosa ...