Browsing SINTEF Open by Author "Kvæstad, Bjarne"
Now showing items 1-11 of 11
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Atlantic cod (Gadus morhua) embryos are highly sensitive to short-term 3,4-dichloroaniline exposure
Hansen, Bjørn Henrik; Farkas, Julia; Piarulli, Stefania; Vicario, Silvia; Kvæstad, Bjarne; Williamson, David Roddan; Sørensen, Lisbet; Davies, Emlyn John; Nordtug, Trond (Peer reviewed; Journal article, 2021)3,4-dichloroaniline (3,4-DCA) is one of the most widely produced anilines world-wide, used in plastic packaging, fabrics, pharmaceuticals, pesticides, dyes and paints as well as being a degradation product of several ... -
Automated morphometrics on microscopy images of Atlantic cod larvae using Mask R-CNN and classical machine vision techniques
Kvæstad, Bjarne; Hansen, Bjørn Henrik; Davies, Emlyn John (Peer reviewed; Journal article, 2022)Measurements of morphometrical parameters on i.e., fish larvae are useful for assessing the quality and condition of the specimen in environmental research or optimal growth in the cultivation industry. Manually acquiring ... -
Effects of marine mine tailing exposure on the development, growth, and lipid accumulation in Calanus finmarchicus
Svendheim, Linn Hjelmeland; Jager, Tjalling; Olsvik, Pål Asgeir; Øverjordet, Ida Beathe; Ciesielski, Tomasz Maciej; Nordtug, Trond; Kristensen, Torstein; Hansen, Bjørn Henrik; Kvæstad, Bjarne; Altin, Dag; Farkas, Julia (Peer reviewed; Journal article, 2021)Marine tailing disposal (MTD) is sometimes practiced as an alternative to traditional mine tailing deposition on land. Environmental challenges connected to MTD include spreading of fine particulate matter in the water ... -
Exposure to low environmental copper concentrations does not affect survival and development in Atlantic cod (Gadus morhua) early life stages
Farkas, Julia; Svendheim, Linn Hjelmeland; Jager, Tjalling; Ciesielski, Tomasz Maciej; Nordtug, Trond; Kvæstad, Bjarne; Hansen, Bjørn Henrik; Kristensen, Torstein; Altin, Dag; Olsvik, Pål Asgeir (Peer reviewed; Journal article, 2021)In this study we investigated potential impacts of Cu exposure at low, environmentally relevant, concentrations on early live stages of Atlantic cod (Gadus morhua). Cod embryos and larvae were exposed to 0.5 μg/L (low), ... -
A flow-through imaging system for automated measurement of ichthyoplankton
Williamson, David Roddan; Nordtug, Trond; Leirvik, Frode; Kvæstad, Bjarne; Hansen, Bjørn Henrik; Ludvigsen, Martin; Davies, Emlyn John (Peer reviewed; Journal article, 2022)Microscopic imaging and morphometric measurement of fish embryos and larvae is essential in environmental monitoring of fish populations and to evaluate larvae development in aquaculture. Traditional microscopy methods ... -
A machine vision system for tracking population behavior of zooplankton in small scale experiments: a case study on salmon lice (Lepeophtheirus salmonis Krøyer, 1838) copepodite population responses to different light stimuli
Kvæstad, Bjarne; Nordtug, Trond; Hagemann, Andreas (Journal article; Peer reviewed, 2020-06-25)To achieve efficient and preventive measures against salmon lice (Lepeophtheirus salmonis Krøyer, 1838) infestation, a better understanding of behavioral patterns of the planktonic life stages is key. To investigate light ... -
Monitoring ocean water quality by deployment of lumpfish (Cyclopterus lumpus) eggs: In situ bioaccumulation and toxicity in embryos
Hansen, Bjørn Henrik; Nordtug, Trond; Øverjordet, Ida Beathe; Sørensen, Lisbet; Kvæstad, Bjarne; Davies, Emlyn John; Meier, Sonnich; Gomes, Tania; Brooks, Steven; Farkas, Julia (Peer reviewed; Journal article, 2022)Fish embryos can bioaccumulate and are particularly sensitive to a wide range of contaminants, which makes them suitable sentinels for environmental biomonitoring. However, fish embryos are very rarely utilized in environmental ... -
Ova lipid profiling and egg quality in wild and captive lumpfish, Cyclopterus lumpus (Linnaeus, 1758)
Hansen, Bjørn Henrik; Kjørsvik, Elin; Malzahn, Arne; Sarno, Antonio; Kulild, Ole Martin; Farkas, Julia; Nordtug, Trond; Rye, Rebecca; Kvæstad, Bjarne; Lein, Ingrid; Hagemann, Andreas (Peer reviewed; Journal article, 2022)Lumpfish (Cyclopterus lumpus) serves an important role as cleaner fish for removing salmon lice in salmon aquaculture. For this use, cultivated lumpfish are preferred over wild-caught fish to avoid overexploitation of ... -
Response of Atlantic salmon in flexible sea cages to waves and currents: Measurements at farm-level and modeling
Pascal, Klebert; Su, Biao; Nissen, Oscar; Kvæstad, Bjarne (Peer reviewed; Journal article, 2023)The shift towards salmon farming in more exposed locations has been an industry-wide trend for the last decade. Moving fish farms to locations with high water currents and waves can improve production by providing more ... -
Responses and preferences of salmon louse (Lepeophtheirus salmonis Krøyer 1836) copepodids to underwater artificial light sources
Nordtug, Trond; Kvæstad, Bjarne; Hagemann, Andreas (Peer reviewed; Journal article, 2021)The ectoparasitic salmon louse (Lepeophtheirus salmonis, Krøyer 1836) remains a major disease problem and cost driver in commercial Atlantic salmon (Salmo salar L) farming and is also implicated in the decline of wild ... -
Toxicity and developmental effects of Arctic fuel oil types on early life stages of Atlantic cod (Gadus morhua)
Hansen, Bjørn Henrik; Nordtug, Trond; Farkas, Julia; Khan, Essa Ahsan; Oteri, Erika; Kvæstad, Bjarne; Faksness, Liv-Guri; Daling, Per Snorre; Arukwe, Augustine (Peer reviewed; Journal article, 2021)Due to the heavy fuel oil (HFO) ban in Arctic maritime transport and new legislations restricting the sulphur content of fuel oils, new fuel oil types are continuously developed. However, the potential impacts of these new ...