Blar i NTNU Open på forfatter "Kjørsvik, Elin"
-
Produced water from North Sea offshore oil platforms causes a suite of biological effects on developing lumpfish (Cyclopterus lumpus) eggs.
Schuldt, Madeline M (Master thesis, 2020)This study investigated the impacts of several produced waters (PWs) from the North Sea on developing Cyclopterus lumpus larvae. Larvae were exposed for 96 hours early in development to 3 concentrations of 5 different PW ... -
Quality of Atlantic Cod Frozen in Cell Alive System, Air-Blast, and Cold Storage Freezers
Erikson, Ulf Gøran; Kjørsvik, Elin; Bardal, Tora; Digre, Hanne; Schei, Marte; Søreide, T.; Aursand, Ida Grong (Journal article; Peer reviewed, 2016)Gutted Atlantic cod, packed in cartons, were frozen immediately after killing in a magnetic field (cell alive system). The results were compared with traditional air-blast freezing or by putting the cartons directly in a ... -
The role of manipulating photoperiod and temperature in oocyte development of the polychaete hediste diversicolor (O.F. Müller, 1976)
Wang, Haiqing; Hagemann, Andreas; Malzahn, Arne; Handå, Aleksander; Uhre, Marianne; Kjørsvik, Elin; Reitan, Kjell Inge (Peer reviewed; Journal article, 2020)Three different experiments were conducted to examine the oocyte development of the polychaete Hediste diversicolor in response to changing photoperiod and temperature at three different periods of oogenesis. In experiment ... -
Sammenligning av embryoutvikling for rognkjeks (Cyclopterus lumpus) stamfisk og villfisk
Kulild, Ole-Martin (Master thesis, 2020)Med ambisjon om å femdoble norsk lakseproduksjon, står fiskenæringen og staten foran utfordringer knyttet til høyt smittepress av lakselus. Per i dag er utsetting av rensefisk i merder den mest brukte metoden for bekjempelse ... -
Seasonal and inter-male variation in spermatogenesis in farmed Atlantic salmon (Salmo salar) during the last year of sexual maturation
Virtanen, Jonni Juhani (Master thesis, 2016)Reproductive patterns in male teleost fish have received relatively little attention compared to those of their female counterparts. Testis maturation and progression in spermatogenesis are usually described with a combination ... -
Skeletal muscle growth dynamics and the influence of first-feeding diet in Atlantic cod larvae (Gadus morhua L.)
Vo, Tu Ahn; Galloway, Trina Falck; Bardal, Tora; Halseth, Christine K.; Øie, Gunvor; Kjørsvik, Elin (Journal article; Peer reviewed, 2016)Dynamics between hypertrophy (increase in cell size) and hyperplasia (increase in cell numbers) of white and red muscle in relation to body size [standard length (SL)], and the influence of the first-feeding diets on muscle ... -
Start-feeding of lumpfish (Cyclopterus lumpus L.) larvae with Artemia and copepods, focusing on growth effects, survival, live prey selection and larval robustness
Rian, Synne Therese (Master thesis, 2019)Fra 1970-tallet har den norske produksjonen av Atlantisk laks (Salmo salar) økt betydelig. I de siste årene har produksjonen stagnert på grunn av høye forekomster av de marine ektoparasittene lakselus (Lepoptheirus salmonis) ... -
STARTRENS – Optimalisert startfôring av rensefisk. Sluttrapport for FHF-prosjekt 901561
Hagemann, Andreas; Malzahn, Arne; Hansen, Bjørn Henrik; Ribicic, Deni; Sarno, Antonio; Kjørsvik, Elin; Vu, Tu Anh; Jager, Tjalling (Research report, 2022)Dette er den faglige sluttrapporten for prosjektet "STARTRENS – Optimalisert startfôring av rensefisk" som ble finansiert av Fiskeri- og havbruksnæringens forskningsfinansiering (#901561). Rensefisk har en sentral rolle i ... -
The digestive system of ballan wrasse (Labrus bergylta), a marine agastric carnivorous teleost
Flaten, Steinar (Master thesis, 2021)The knowledge of the digestive system of teleosts is limited, especially when considering the huge variation in morphology. There are particularly few studies of the digestive system of agastric (stomachless) teleosts such ... -
The effect of different live feed on the early growth and development of ballan wrasse (Labrus bergylta Ascanius, 1767) larvae and its organs
Gagnat, Maren Ranheim (Master thesis, 2012)Salmon lice (Lepeophtheirus salmonis) have been an increasing problem for the Norwegian aquaculture industry in recent years, and several chemicals have been used by the industry to get rid of the louse. However, resistance ... -
The effect of different live feeds and water qualities on growth, survival, ossification and skeletal anomalies of ballan wrasse (Labrus bergylta) larvae
Høyland, Oda Skognes (Master thesis, 2015)Salmon lice (Lepeophtheirus salmonis) infections is one of the major problems in Atlantic salmon (Salmo salar) aquaculture. This has led to an increasing interest in the cultivation of ballan wrasse (Labrus bergylta), for ... -
The effect of different live prey types on growth and muscle development, in ballan wrasse (Labrus bergylta, Ascanius 1767) larvae
Berg, Martin (Master thesis, 2012)Sea lice have been causing problems in Norwegian salmon farming industry for decades; increasing mortality and reducing the welfare of farmed and wild fish. Various chemical agents have been used to combat sea lice, but ... -
The effect of incubation temperature on embryonic development and muscle growth in yolk-sac larvae of the European eel (Anguilla anguilla L., 1758)
Davidsen, Martin (Master thesis, 2012)Reproduction of European eel (Anguilla anguilla) in aquaculture systems has become a focus research area due to severe decline of natural stocks, and increasing interest to breed eels for a self-sustained aquaculture. ... -
The molecular basis of long chain polyunsaturated fatty acid (LC-PUFA) biosynthesis in Atlantic salmon (Salmo salar L): In vivo functions, functional redundancy and transcriptional regulation of LC-PUFA biosynthetic enzymes
Datsomor, Alex Kojo (Doctoral theses at NTNU;2019:383, Doctoral thesis, 2019)Farmed Atlantic salmon (Salmo salar L.) is a rich source of the omega-3 fatty acids (ω-3 FA), eicosapentaenoic (EPA) and docosahexaenoic (DHA) acids, which are linked to health benefits in humans including prevention of ... -
Ultrasonic imaging as a means of monitoring gonadal development in lumpfish (Cyclopterus lumpus)
Mlingi, Frank Thomas; Puvanendran, Velmurugu; Burgerhout, Erik; Tveiten, Helge; Tomkiewicz, Jonna; Kjørsvik, Elin; Mommens, Maren (Peer reviewed; Journal article, 2023)The commercial farming of juvenile lumpfish requires monitoring of gonadal development to achieve synchronized production. Conventional methods such as gonadosomatic index (GSI), sex hormone analyses, gonadal histology, ... -
Ultrasound as a non-invasive tool for monitoring reproductive physiology in female Atlantic salmon (Salmo salar)
Næve, Ingun; Mommens, Maren; Arukwe, Augustine; Kjørsvik, Elin (Journal article; Peer reviewed, 2018)Aiming to explore ultrasound technology as a noninvasive method for maturation monitoring, we compared ultrasound observations and measurements in female Atlantic salmon (Salmo salar) during the last year before ovulation ... -
Ultrasound as a noninvasive tool for monitoring reproductive physiology in male Atlantic salmon (Salmo salar)
Næve, Ingun; Mommens, Maren; Arukwe, Augustine; Virtanen, Jonni; Hoque, Md Enamul; Kjørsvik, Elin (Journal article; Peer reviewed, 2019)We examined the potential for ultrasound as a noninvasive tool for maturation monitoring in Atlantic salmon (Salmo salar) males. Ultrasound examination and measurements were compared to common practices for maturation ... -
UV treatment in RAS influences the rearing water microbiota and reduces the survival of European lobster larvae (Homarus gammarus)
Attramadal, Kari J.K.; Øien, John Vegard; Kristensen, Elisabeth; Evjemo, Jan Ove; Kjørsvik, Elin; Vadstein, Olav; Bakke, Ingrid (Peer reviewed; Journal article, 2021)The rearing environment is important for a stable production of good quality lobster juveniles. By providing an environment excluding pathogens and dominated by mutualistic bacteria, the probability of developing healthy ...