The Arctic marine ecosystem is characterized by strong seasonality and a short but productive period of primary production in the spring when the ice breaks up. Calanus glacialis is one of the key links between primary producers and higher trophic levels, and it is adapted to the strong seasonality by life cycle traits such as; seasonal vertical migration, diapausing, reproduction in the spring and ...

Obesity is one of the leading causes for the development of metabolic disorders, such as insulin resistance and type 2 diabetes. Omega-3 fatty acids, found in seafood and marine oils, are shown to reduce obesity, lower blood lipid levels, change the composition of the gut microbiota and reduce the risk for cardiovascular diseases. The increased demand for seafood and marine oils has put pressure on ...

In the pelagic system, phytoplankton are the main producers of n-3 LC-PUFA and make up the foundation of the oceanic food web. Zooplankton, such as copepods and krill, are the most numerous primary consumers in the marine environment and have a central role in the energy transfer to higher trophic levels. The copepod Calanus finmarchicus is present in large amounts in the North Atlantic and has ...

<p>Cod caught with bottom trawls and gillnets have often been associated with poor and variable quality, and little is known about how changes in gear design and fishing practices may influence the quality of fish caught by these two fishing gears. It is difficult, if not impossible, to improve catch quality if fish are damaged during the capture process. Therefore, preventing the deterioration of ...

The Arctic is currently in a rapid state of change, with temperature increases in this region being three times the rate of the global average and sea-ice extent declining rapidly. In 2006, a sudden shift in the sea-ice regime in Svalbard, Norway, occurred with the altered sea-ice conditions persisting to the present day. In order to study the impacts of the environmental changes occurring in the ...

<p>This thesis investigates nature tourism companies, which strive to incorporate sustainability into their business models and change them to be more resilient. For this purpose, it adopts a dynamic perspective on business models by which companies address corporate sustainability which is understood here as a balance among environmental, social, and economic pillars as well as a sustainable ...

The basal prerequisite for managing species and understanding ecosystems is correct species and population identification. Without knowing the species, we cannot with accuracy detect changes in distribution or abundance due to climate change, fisheries, diseases or any other types of impact. This thesis gives the first complete overview of chondrichthyan fishes (sharks, skates, rays and chimaeras), ...

<p>Climate change is one of the greatest threats to animal wildlife in high latitude freshwater ecosystems. Climate warming is rapidly increasing water temperatures in these areas, affecting biological processes of ectotherms such as growth, maturation and reproduction, which in turn trigger population responses. The magnitude of the effects of climate warming will vary depending on the thermal niche ...

Gitt at norske fiskerier har gjennomgått store endringer side 1970-tallet, med utgangspunkt i Jentoft and Wadel (1984), utforsker dette arbeidet det moderne sysselsettingssystemet på kysten, hvordan det har endret seg og hva effekten har vært på kystsamfunn. Studien viser at relasjonene mellom fiskeriene og kystsamfunnene har endret seg. På 1970-talet var sysselsettingssystemet preget av et helhetlig ...

<i>Purpose</i> – Three main objectives are defined in this thesis: 1) To determine the extent to which the nature of a consideration set affects consumer choice; 2) To investigate how consumer attitudes, knowledge, and convenience motivations affect the formation of a consideration set; and 3) To investigate how category presentation moderates the relationship between convenience motivations and ...