Infectious diseases are still a major problem in salmon aquaculture despite several attempts on developing prophylactic measures. Amoebic gill disease (AGD) is considered a growing threat in Norwegian salmon aquaculture. It has increased in prevalence and geographic distribution in the last years, resulting in considerable economic losses. Current treatments (i.e., freshwater and hydrogen peroxide ...

Crumb rubber (CR) produced from end of life vehicle tires is widely used on artificial sports fields and to create urban artificial surfaces. It is also used as a surrogate for tyre wear particles in experimental studies simulating the behaviour and effects of car tyre particles in the environment. It is known to contain a wide range of organic chemicals and metals, some of which are only just being ...

Heart injuries and diseases are one of the largest challenges in Atlantic salmon aquaculture. Presently, salmon experience intensive farming conditions and feeding regimes, and different viral and bacterial pathogens flourish and create cardiac health risks. Many have suggested how early life history plays a greater role in performance than previously assumed. The RCN-NFR funded project COOLFISH ...

Rømning av oppdrettslaks medfører til uønsket genetisk innblanding i den ville laksebestanden, noe som resulterer i dårligere ytelse og overlevelse hos den ville laksen. I tillegg er kjønnsmodning av oppdrettslaksen et velferdsproblem, da dette medfører en rekke negative effekter for fisken, blant disse redusert vekst, immunrespons og hypo- osmoregulatoriske evner. En mulig løsning på disse problemene ...

Climate change impacts the average temperature in the world’s oceans, as well as other environmental parameters, such as oxygen levels. These changes are threatening and challenging animals living there, including farmed species. In this trial Atlantic salmon (Salmo salar) were exposed to fluctuating temperature (12-17C) as a single stressor, and in combination with lowered level of dissolved oxygen ...

Car tire rubber particles (CTRPs) are a major source of microplastic pollution to the environment, originating from abrasion during driving or the use of crumb rubber granulates made of discarded tires. However, large knowledge gaps remain regarding the distribution and presence of CTRPs in marine environments and interaction with marine organisms. The aims of this thesis were to investigate the ...

The salmonids in today’s Norwegian aquaculture are exposed to many stressors, like suboptimal water quality, crowding and handling. This project focuses on red blood cell (RBCs) function in Atlantic salmon and how cellular responses are affected by stress. Since fish RBCs are nucleated and can change their gene expression, one of the main goals of this thesis is to better understand how the ...

Bacteriophages are viruses that specifically infect bacteria. These obligate intracellular parasites are Earth's most copious, ubiquitous, and genetically diverse (unexplored) biological entities. Organisms in the Arctic environment constantly experience extreme conditions, therefore life in the Arctic evolved different specialized strategies and molecules to survive which offers huge opportunities ...

In sympatry, juvenile brown trout (Salmo trutta) usually occupy the shallow and most productive areas (littoral zone) of lakes, while juveniles of Arctic charr (Salvelinus alpinus) are found in deeper, less productive parts. In contrast, when Arctic charr juveniles occur in allopatry, they often occupy shallow littoral areas as well. Habitat segregation has traditionally been interpreted as a trade-of ...

Plast er blant de vanligste typene av forsøpling, og fiskeri representerer en av kildene til plastforurensning i det marine miljøet fra forlatt, mistet eller tapt fangstredskap (eng., ALDFG). Fordi plastmaterialer brukes i fiskeredskaper har ALDFG, inklusive garn og liner, negativ innvirkning på det marine miljøet. Bruk av biologisk nedbrytbare plastmaterialer i fiskeredskaper har potensial til å ...