The introduction of the Nordmøre grid to shrimp trawls has reduced the issue of bycatch to that of small-sized species and juveniles that are able to pass through the grid and enter the small-meshed cod end together with the targeted shrimp. This study estimated the size- and species-selective performance of the Nordmøre grid in the configuration most often applied by fishermen and made a preliminary ...

We present a study on the effect of water temperature on immunization of Atlantic lumpfish. In total, 360 fish were vaccinated with either 50 μl of an oil‐based injection vaccine (VAX), with Aeromonas salmonicida and Vibrio salmonicida antigens, or PBS. Fish were vaccinated at three different water temperatures, 5°C, 10°C and 15°C, and sorted into six groups (N = 60). Lumpfish were weighed every 3 ...

In autumn 2015, several sources reported observations of large amounts of gelatinous material in a large north Norwegian fjord system, either caught when trawling for other organisms or fouling fishing gear. The responsible organism was identified as a physonect siphonophore, Nanomia cara, while a ctenophore, Beroe cucumis, and a hydromedusa, Modeeria rotunda, were also registered in high abundances ...

The purpose of the study was to evaluate and compare the effect of different diets on the gut structure of diploid and triploid juvenile Atlantic salmon (Salmo salar), and analyze the overall performance in terms of growth and survival from hatch until the end of smoltification. At the beginning of the experiment, fish were divided into two groups, one diploid group and one triploid group. Four ...

Danish seining is an important fishing method used to harvest demersal species. Knowledge about the size selectivity of different demersal species with this type of fishing gear is therefore of importance for managing the exploitation of marine resources. However, there are only limited data on size selection in cod ends in this fishery. Sea trials were therefore carried out to collect size selectivity ...

Microalgae have proven to contain a vast amount of beneficial, high value compounds like proteins, lipids and powerful antioxidants as well as some interesting bioactive compounds. Nevertheless, microalgae are severely underrepresented in conjunction with marine bioactive natural product discovery. This thesis aims to unlock bioactivity potential of a microalgae species from the most abundant and ...

Norge er verdens største produsent av atlantisk laks og ambisjonene er å femdoble lakseproduksjonen frem mot 2050. Siden 2012 har det ikke vært produksjonsvekst i oppdrettsnæringen som følge av problemer med lakselus og ulike fiskesykdommer. Problemene har tvunget oppdrettsnæringen å tenke i nye baner for å oppnå videre vekst. Siste årene har flere oppdrettsselskap startet utbygging av landbaserte ...

The global aquaculture sector has grown continuously over the past 40 years, though unevenly among countries. Differences in factors such as inputs, climate, management, technology, markets, social environment, and institutions might be reasons for the disparities in growth. This study focuses on institutions, by analyzing the relationship between annual growth in the production of the major aquaculture ...

Offshore drilling operations result in the generation of drill cuttings and localized smothering of the benthic habitats. This study explores bacterial community changes in the in the upper layers of the seafloor resulting from an exploratory drilling operation at 1400 m water depth on the Barents Sea continental slope. Significant restructurings of the sediment microbiota were restricted to the ...

The high abundances of Northeast Arctic cod (Gadus morhua) in the Barents Sea have led to the development of a new fishing tactic called buffer towing. On factory trawlers, the trawl is deployed immediately after taking the catch onboard, a tactic used to ensure a continuous supply of fish is being processed. If the desired amount of fish is caught before the catch from the previous haul has been ...