Recent additions

  • Gear modifications for bycatch reduction in the Bay of Biscay demersal trawl fishery 

    Cuende de Francisco, Elsa (Doctoral thesis; Doktorgradsavhandling, 2022-12-20)
    <p>Bottom trawl fisheries have great social and economic importance for coastal communities in the Basque Country. However, the activity of the demersal trawl fishery in the Bay of Biscay, which includes the coastline of the Basque country, can be compromised due to its multispecies nature, high proportion of unwanted species in the catch, and the increasingly strict legislation implemented aiming ...
  • Farm sustainability as a sustainability learning process in Arctic Norway 

    Halland, Hilde (Doctoral thesis; Doktorgradsavhandling, 2022-11-03)
    Sustainability is proposed as a solution to the many negative consequences of modern agriculture. However, although science and policy have aimed for sustainability for more than two decades, it seems that we are not making enough progress. This is due to the complexities of the sustainability concept and that we need to better understand how we can create change. In seeing sustainability as a ...
  • Atmospheric CO2 drawdown, community dynamics and selection of surface microbiomes in marine cold-water ecosystems 

    Aalto, Nerea Johanna (Doctoral thesis; Doktorgradsavhandling, 2022-10-10)
    <p>The European Arctic is characterized by large surface areas of coastal seas and long coastlines where important ecosystem processes are regulated by marine microbiomes that contribute to global carbon cycling via primary productivity and atmospheric CO<sub>2</sub> drawdown. In addition to biogeochemical cycling, these complex microbial ecosystems also support major marine food webs and lend ...
  • Catch quality of Northeast Atlantic cod (Gadus morhua) caught by bottom trawl and gillnet – Effects of changes in gear design and fishing practices 

    Jensen, Tonje Kristin (Doctoral thesis; Doktorgradsavhandling, 2022-10-07)
    <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 ...
  • Meroplankton on Arctic inflow shelves: Diversity, seasonality and origins of benthic invertebrate larvae on the Barents and Chukchi shelves 

    Descôteaux, Raphaëlle (Doctoral thesis; Doktorgradsavhandling, 2022-10-05)
    Planktonic early life stages of marine benthic invertebrates play an important role in dispersal and at times represent a substantial proportion of the zooplankton. Information about the larval communities present on the Arctic inflow shelves of the Barents and Chukchi Seas, however, is incomplete and limited because of infrequent sampling and low resolution of identification. The aims of the work ...
  • Economic seafood industries issues in Sri Lanka: Challenges for the sectors in developing countries due to institutions, environmental challenges in aquaculture and data poor fisheries 

    Nadarajah, Suthamathy (Doctoral thesis; Doktorgradsavhandling, 2022-09-23)
    The thesis focuses on three specific challenges for the seafood industry: (1) the quality and capacity of national institutions; (2) the importance of environmental factors for aquaculture production; and (3) how to monitor and, hopefully, manage fisheries with few and uncertain observations (data-poor fisheries). Each challenge has been studied empirically using proper methodologies and presented ...
  • Sequence-Based Analysis of Eukaryotic Protein Evolution 

    Bockwoldt, Mathias (Doctoral thesis; Doktorgradsavhandling, 2018-10-12)
    The goal of this thesis was to comprehend evolutionary patterns in different contexts. To get a broad spectrum of methods, three projects were included of which one is published and two are in preparation. In the first project, we looked into the fate of new mutations in protein regions that do not have a defined three-dimensional structure. Generally, the fate of a new mutation is governed by ...
  • Antimicrobial peptides in sea urchins. Isolation, characterization and expression 

    Li, Chun (Doctoral thesis; Doktorgradsavhandling, 2010)
    <p>Echinoderms are interesting animals for biodiscovery/bioprospecting as sources for novel compounds that have interesting activities. These compounds might be developed into potential drug candidates. In this work, two novel families of short proteins, referred to as antimicrobial peptides (AMPs) were isolated and characterized from the sea urchin, <i>Strongylocentrotus droebachiensis</i>. One of ...
  • Response and resilience of the microbial methane filter to ecosystem changes in Arctic peatlands 

    Rainer, Edda Marie (Doctoral thesis; Doktorgradsavhandling, 2022-06-30)
    <p>Climate change is a major concern in the Arctic region, as large amounts of organic carbon (C) are stored in permafrost soils and sediments. Increasing average temperatures have the potential to release that C and making it available to biologic activity. Carbon-rich, anoxic soils such as peatlands are inhabited by methanogenic archaea that can metabolize by-products of microbial C decomposition ...
  • Arctic deep-sea benthos: biodiversity, biological traits, and food webs 

    Zhulay, Irina (Doctoral thesis; Doktorgradsavhandling, 2022-06-24)
    Understanding Arctic deep-sea ecosystem structure and functioning is an urgent task because ongoing sea-ice reduction modifies and opens up these regions for resource exploitation. This thesis aims to increase knowledge on epibenthos in the Chukchi Borderland (deep Arctic Ocean). Paper I documents low epifaunal densities and biomass, a total of 152 taxa, and dominance of Echinodermata, Arthropoda ...
  • Antimicrobial peptides from the Arctic ascidian Synoicum turgens 

    Hansen, Ida Kristine Østnes (Doctoral thesis; Doktorgradsavhandling, 2022-06-17)
    The rise in frequency of antibiotic resistant pathogenic bacteria makes the need for new treatment options for previously curable bacterial infections ever more important. In the process of discovering and developing antibacterial agents, one powerful approach has been borrowing wisdom from nature. Antimicrobial peptides (AMPs) are critical components of the innate immune systems found in almost all ...
  • Living on the dark side? Investigations into under-ice light climate and sympagic amphipods 

    Krapp, Rupert Harald (Doctoral thesis; Doktorgradsavhandling, 2022-06-10)
    The manuscripts of the dissertation presented here encompass several aspects of adaptations in ice-associated amphipods, focussing mainly on their ability to cope with increased light levels, including the ultraviolet radiation (UVR), under thinner or more dispersed sea ice. A decrease in multi-year ice (MYI) in the Arctic, and a concurrent reduction in stable habitat for ice-associated species, is ...
  • Sea ice dependence in Arctic marine organisms: life cycles, resource use, and trophic linkages 

    Kunisch, Erin (Doctoral thesis; Doktorgradsavhandling, 2022-06-01)
    Climate warming in the Arctic has resulted in widespread changes in the physical oceanographic characteristics of the Arctic Ocean. One particularly visible change is the loss of sea ice both within the Arctic Ocean and in the surrounding shelf seas. Compared to the other shelf seas, the Barents Sea has experienced the largest declines in sea ice extent, with much of this loss occurring during winter. ...
  • The use of stated preferences and bio-economic modeling in marine ecosystem service management: Case studies from Arctic Norway 

    Ahi, Julide Ceren (Doctoral thesis; Doktorgradsavhandling, 2022-06-09)
    <p>Regarding the growing population and escalated development on the coasts, the environmental policymakers often face the dilemma of exploiting or protecting marine and coastal ecosystem services (ES). Therefore, the non-market valuation has become an essential instrument for supporting policymakers in eliciting preferences and welfare estimates regarding various ES, which further feed into the ...
  • Population cycles in small rodents seen through the lens of a wildlife camera 

    Kleiven, Eivind Flittie (Doctoral thesis; Doktorgradsavhandling, 2022-06-08)
    Population cycles in small rodents have attracted attention from ecologists for more than a century. This spectacular phenomenon is crucial for the functioning of many northern food-webs and has intrigued ecologist because of its lessons for general ecology. Knowledge about the rodent cycle has, however, been hampered by the lack of reliable monitoring methods both for rodents and some of their ...
  • Economic valuation of climate change impacts on ecotourism in Rekawa coastal wetland in Sri Lanka: Application of stated preference techniques 

    Salpage, Nesha Dushani (Doctoral thesis; Doktorgradsavhandling, 2022-06-02)
    <p>The research presented in this thesis has focused on the economic valuation of climate change impacts on ecotourism in a coastal wetland using three different methods of stated-preference techniques to provide answers to different research questions related to coastal tourism and climate change. Rekawa coastal wetland in Southern Sri Lanka was taken as the empirical context to examine the identified ...
  • Tundra vegetation ecology from the sky - Aerial images and photogrammetry as tools to monitor landscape change 

    Eischeid, Isabell (Doctoral thesis; Doktorgradsavhandling, 2022-05-24)
    Long-term temperature increases, higher frequencies of extreme weather events and changes in food web structures will all affect the state of Arctic tundra ecosystems at different temporal and spatial scales. Ecologists are tasked with understanding these biotic and abiotic interactions and finding methods to measure them. This thesis applies new technology and methods within the principles of ...
  • How to tame a parasite - Developing biotechnological pipelines for gene function studies in Cuscuta 

    Lachner, Lena Anna-Maria (Doctoral thesis; Doktorgradsavhandling, 2022-05-20)
    <p><i>Cuscuta</i> is a genus of parasitic plants that form cross-species bridges and connect to the xylem and phloem of a wide variety of host plants. Because of their unique lifestyle, research into processes like the formation of connections in between plant cells and plant immunity would benefit from <i>Cuscuta</i> as a model system. However, a method to study gene functions in a <i>Cuscuta</i> ...
  • Evolution of seasonal adaptations in voles - a physiological and genetic approach 

    Van Dalum, Mattis Jayme (Doctoral thesis; Doktorgradsavhandling, 2022-05-06)
    <p>This thesis addressed phenotypic and genetic variation in seasonal time keeping mechanisms of the tundra vole (<i>Microtus oeconomus</i>) and the common vole (<i>Microtus arvalis</i>). Voles (<i>Microtus</i>) are short-lived, non-hibernating and seasonally breeding rodents. The genus has rapidly evolved (< 2 million years) into one of the most speciose mammalian genera (Sitnikova et al. 2007; ...
  • Tangled up in prices going up and down: price determination in selected agri-food markets 

    Kidane, Dejene Gizaw (Doctoral thesis; Doktorgradsavhandling, 2022-05-02)
    <p>The dissertation includes four papers altogether. Three papers examine mechanisms for price transmission between markets. Among them, one deals with price transmission along the supply chain, and the other two deal with price transmission across spatially distinct markets. The fourth paper measures the effects of demand shifts on the market price equilibrium. <p>Paper 1 investigates price ...

View more