Browsing NTNU Open by Author "Kjørsvik, Elin"
Now showing items 1-20 of 40
-
1H NMR metabolic profiling of cod (Gadus morhua) larvae: potential effects of temperature and diet composition during early developmental stages
Chauton, Matilde Skogen; Galloway, Trine Falck; Kjørsvik, Elin; Størseth, Trond Røvik; Puvanendran, Velmurugu; van der Meeren, Terje; Karlsen, Ørjan; Rønnestad, Ivar; Hamre, Kristin (Journal article; Peer reviewed, 2015)Marine aquaculture offers a great source of protein for the increasing human population, and farming of, for example, Atlantic salmon is a global industry. Atlantic cod farming however, is an example of a promising industry ... -
Allometric growth and development of organs in ballan wrasse (Labrus bergylta Ascanius, 1767) larvae in relation to different live prey diets and growth rates
Kjørsvik, Elin; Gagnat, Maren Ranheim; Bardal, Tora; Wold, Per-Arvid; Øie, Gunvor (Journal article; Peer reviewed, 2016)Small fish larvae grow allometrically, but little is known about how this growth pattern may be affected by different growth rates and early diet quality. The present study investigates how different growth rates, caused ... -
Ballan wrasse (Labrus bergylta) Larvae and Live-Feed Quality; Effects on Growth and Expression of Genes related to Mitochondrial Functions
Stavrakaki, Maria Georgia (Master thesis, 2013)Salmon production is threatened by sea louse Lepoptheirus salmonis, affecting both the environment and the industry?s economy. Use of the cleaner fish ballan wrasse (Labrus bergylta) is a promising method of salmon delousing ... -
Changes in hormone profiles in relation to ultrasound-determined testis maturation during a reproductive cycle in Atlantic salmon (Salmo salar)
Hoque, Md. Enamul (Master thesis, 2016)At present, fully mature males are identified by checking for running milt by palpitation during gamete production of Atlantic salmon (Salmo salar). Ultrasound (US) technology could provide a cheap and fast method to monitor ... -
Copepods enhance nutritional status, growth and development in Atlantic cod (Gadus morhua L.) larvae – can we identify the underlying factors?
Karlsen, Ørjan; van der Meeren, Terje; Rønnestad, Ivar; Mangor-Jensen, Anders; Galloway, Trine Falck; Kjørsvik, Elin; Hamre, Kristin (Journal article; Peer reviewed, 2015)The current commercial production protocols for Atlantic cod depend on enriched rotifers and Artemia during first-feeding, but development and growth remain inferior to fish fed natural zooplankton. Two experiments were ... -
Development of non-invasive methods using ultrasound technology in monitoring of Atlantic salmon (Salmo salar) production and reproduction
Næve, Ingun (Doktoravhandlinger ved NTNU;2020:51, Doctoral thesis, 2020)In production of Atlantic salmon (Salmo salar) broodfish, handlings for lice and disease management, gradings and checks for progression of sexual maturation, are inevitable. These handlings cause stress responses and can ... -
Developmental effects in fish embryos exposed to oil dispersions – the impact of crude oil micro-droplets
Hansen, Bjørn Henrik; Salaberria, Iurgi; Read, Kari; Wold, Per-Arvid; Hammer, Karen Marie; Olsen, Anders Johny; Altin, Dag; Øverjordet, Ida Beathe; Nordtug, Trond; Bardal, Tora; Kjørsvik, Elin (Journal article; Peer reviewed, 2019)During accidental crude oil spills and permitted discharges of produced water into the marine environment, a large fraction of naturally occurring oil components will be contained in micron-sized oil droplets. Toxicity is ... -
Dietary effects of different live prey on growth and functional development in ballan wrasse (Labrus bergylta) larvae and juveniles
Sørøy, Maria Oknes (Master thesis, 2012)Ballan wrasse (Labrus bergylta) is a new species in aquaculture, the newly initiated intensive production is a response to the increasing demands for wrasse as cleaner fish in salmon and trout farming. The dietary requirements ... -
Differential expression of gonadotropin and estrogen receptors and oocyte cytology during follicular maturation associated with egg viability in European eel (Anguilla anguilla)
da Silva, Filipa F.G.; Tveiten, Helge; Maugars, Gersende Marie Aimee; Lafont, Anne-Gaëlle; Dufour, Sylvie; Støttrup, Josianne G.; Kjørsvik, Elin; Tomkiewicz, Jonna (Journal article; Peer reviewed, 2018)In captivity, oogenesis and ovarian follicle maturation in European eel can be induced experimentally using hormonal therapy. The follicle's ability to respond effectively to the induction of maturation and ovulation, ... -
Effects of different live feed on ballan wrasse (Labrus bergylta) larval hepatocyte and enterocyte development
Romundstad, Marte (Master thesis, 2015)Abstract Salmon lice infestations are one of the biggest challenges for Norwegian salmon farming today. Delousing agents have been the solution to these infestations in the past, but overuse and wrong dosages have caused ... -
Effects of different live feed on larval growth and development in ballan wrasse (Labrus bergylta Ascanius, 1767): - A metabolomics study
Almli, Martin (Master thesis, 2012)The use of ballan wrasse (Labrus bergylta) for the treatment of salmon lice (Lepeophtheirus samonis) in salmon farming is rapidly growing due to resistance to chemical treatments. The demand for high quality and large ... -
Effects of feeding with copepod nauplii (Acartia tonsa) compared to rotifers (Brachionus ibericus, Cayman) on quality parameters in Atlantic cod (Gadus morhua) larvae
Hansen, Marit Holmvaag (Master thesis, 2011)Good nutritional quality is a key for a successful Atlantic cod (Gadus morhua) juvenile producer. Copepods are the natural prey for marine fish larvae, and its nutritional composition is believed to be optimal for the ... -
Effects of light and temperature regimes on the sexual maturation of male lumpfish (Cyclopterus lumpus).
Guercini, Emanuele (Master thesis, 2019)Nowadays salmon lice (Lepeophtheirus salmonis) constitutes one of the biggest threats to the welfare of farmed Atlantic salmon (Salmo salar). Lumpfish (Cyclopterus lumpus) are currently deployed in sea cages with salmon ... -
Effects of live feed quality on cod (Gadus morhua L.) larval hepatocyte and enterocyte development
Norheim, Ida Anette (Master thesis, 2011)Production of high quality juveniles is still a bottleneck in the intensive culture of cod (Gadus morhua L.), and suboptimal nutrition at the larvae s early life stages is one of the decisive factors for this. The cod larva ... -
Effects of live feed quality on cod (Gadus morhua L.) larval muscle growth and development: .
Halseth, Christine Kurki (Master thesis, 2011)- -
Effects on growth, survival and bone development from start feeding lumpsucker (Cyclopterus lumpus) larvae with Artemia, copepods and fomulated feed
Hanssen, Julie Terese (Master thesis, 2018)Salmon lice (Lepeoptherius solmonis) is a major health problem in salmon (Salmo salar) production. Reduced lice sensitivity towards several of the chemical treatments have increased the interest in cleaner fish used to ... -
Embryonic development and sensitive stages of Atlantic salmon (Salmo salar) eggs
Alves Musialak, Luciana (Master thesis, 2020)Atlantic salmon (Salmo salar) aquaculture is of great importance to Norway. The egg and hatchery sector, is important both finacially and biologically to salmon production, since it is essential to provide a broodstock ... -
Microbial characterization and influence on copepod (Acartia tonsa) nauplii and egg production in water treatment systems with and without membrane filtration
Phan Hung, Anh (Master thesis, 2014)Acartia tonsa is a pelagic calanoid copepod with a diverse distribution, a wide tolerance of temperature and salinities, has short generation time, can produce resting eggs, and has been considered as an excellent feed for ... -
Morphological development of wild leptocephalus larvae of the European eel (Anguilla anguilla) - With special emphasis on muscle and digestive system
Knutsen, Helene Rønquist (Master thesis, 2015)The larval stage of the European eel (Anguilla anguilla) is largely undescribed. Increased knowledge about the ontogeny of the eel is be of interest both in an ecological perspective, but also in relation to a conservation, ... -
OC2017 A-029 - Vannkvalitet og startfôring av rognkjeks - Effekt av fôring med levende copepoder i tidlige faser (FHF prosjekt nr 901174)
Dahle, Stine Veronica Wiborg; Hagemann, Andreas; Attramadal, Kari; Kjørsvik, Elin; Bardal, Tora (Research report, 2017)I oppdrett av rognkjeks benyttes fonnulert tønfor av små partikler fra start, som gir mye forspill i karene. Høy og varierende organisk belastning i systemet gir grobunn for oppblomstring av opportunistiske bakterier ...