Browsing NTNU Open by Author "Hansen, Bjørn Henrik"
Now showing items 21-36 of 36
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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 ... -
The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil
Nordtug, Trond; Olsen, Anders Johny; Wold, Per-Arvid; Salaberria, Iurgi; Øverjordet, Ida Beathe; Altin, Dag; Kjørsvik, Elin; Hansen, Bjørn Henrik (Peer reviewed; Journal article, 2022)During sub-sea oil spills to the marine environment, oil droplets will rise towards the sea surface at a rate determined by their density and diameter as well as the vertical turbulence in the water. Micro-droplets (< 50 ... -
An impact-based environmental risk assessment model toolbox for offshore produced water discharges
Nepstad, Raymond; Kotzakoulakis, Konstantinos; Hansen, Bjørn Henrik; Nordam, Tor; Carroll, JoLynn (Peer reviewed; Journal article, 2023)We present a novel approach to environmental risk assessment of produced water discharges based on explicit impact and probability, using a combination of transport, fate and toxicokinetic-toxicodynamic models within a ... -
Medium-term exposure of the North Atlantic copepod Calanus finmarchicus (Gunnerus, 1770) to CO2-acidified seawater: effects on survival and development
Pedersen, Sindre Andre; Hansen, Bjørn Henrik; Altin, D; Olsen, Anders Johny (Journal article; Peer reviewed, 2013)The impact of medium-term exposure to CO2-acidified seawater on survival, growth and development was investigated in the North Atlantic copepod Calanus finmarchicus. Using a custom developed experimental system, fertilized ... -
Modelling the dynamics of growth, development and lipid storage in the marine copepod Calanus finmarchicus
Jager, Tjalling; Salaverria-Zabalegui, Iurgi Imanol; Altin, Dag; Nordtug, Trond; Hansen, Bjørn Henrik (Journal article; Peer reviewed, 2017)Mechanistic models are essential tools for interpreting and predicting the consequences of a changing environment and stressors such as pollution on the life histories of marine organisms. Here, we apply the simple and ... -
Mortality and transcriptional effects of inorganic mercury in the marine copepod Calanus finmarchicus
Tollefsen, Knut Erik; Song, You; Høgåsen, Tore; Øverjordet, Ida Beathe; Altin, Dag; Hansen, Bjørn Henrik (Journal article; Peer reviewed, 2017)Inorganic mercury (Hg) is highly toxic to organisms including crustaceans and displays multiple toxic modes of action (MoA). The main aim of this investigation was to assess the acute and sublethal toxicity mediated by ... -
Neurobehavioral effects of early life exposure to Rare Earth Elements in the larval zebrafish (Danio rerio)
Fossum, Frida Nonstad (Master thesis, 2022)Sjeldne jordartsstoffer (REE) er unike grunnstoffer som finnes naturlig i mineralform, og som etter menneskelig bruk har blitt funnet i jord, elver, estuarier, avløpsvann og til og med drikkevann. Det finnes økende mistanke ... -
Oil-mediated oxidative-stress responses in a keystone zooplanktonic species, Calanus finmarchicus
Soloperto, Sofia; Altin, Dag; Hallman, Anna; Skottene, Elise; Hansen, Bjørn Henrik; Jenssen, Bjørn Munro; Ciesielski, Tomasz Maciej (Peer reviewed; Journal article, 2022)The copepod Calanus finmarchicus is an ecologically important species in the North Atlantic, Norwegian and Barents seas. Accidental or continuous petroleum pollution from oil and gas production in these seas may pose a ... -
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 ... -
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 ... -
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 ... -
Sources, distribution and effects of rare earth elements in the marine environment: Current knowledge and research gaps
Piarulli, Stefania; Hansen, Bjørn Henrik; Ciesielski, Tomasz Maciej; Zocher, Anna-Lena; Malzahn, Arne; Olsvik, Pål Asgeir; Sonne, Christian; Nordtug, Trond; Jenssen, Bjørn Munro; Booth, Andy; Farkas, Julia (Peer reviewed; Journal article, 2021)Rare earth elements and yttrium (REY) are critical elements for a wide range of applications and consumer products. Their growing extraction and use can potentially lead to REY and anthropogenic-REY chemical complexes ... -
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 β-oxidation pathway is downregulated during diapause termination in Calanus copepods
Skottene, Elise; Tarrant, Ann M.; Olsen, Anders Johny; Altin, Dag; Østensen, Mari-Ann; Hansen, Bjørn Henrik; Choquet, Marvin; Jenssen, Bjørn Munro; Olsen, Rolf Erik (Journal article; Peer reviewed, 2019)Calanus copepods are keystone species in marine ecosystems, mainly due to their high lipid content, which is a nutritious food source for e.g. juvenile fish. Accumulated lipids are catabolized to meet energy requirements ... -
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 (Journal article; Peer reviewed, 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 ... -
Transcriptional profiling of reproductive development, lipid storage and molting throughout the last juvenile stage of the marine copepod Calanus finmarchicus
Tarrant, Ann; Baumgartner, Mark; Hansen, Bjørn Henrik; Altin, Dag; Nordtug, Trond; Olsen, Anders Johny (Journal article; Peer reviewed, 2014)Introduction Calanus finmarchicus, a highly abundant copepod that is an important primary consumer in North Atlantic ecosystems, has a flexible life history in which copepods in the last juvenile developmental stage (fifth ...