• Change in Fish Community Structure in the Barents Sea 

      Aschan, Michaela; Fossheim, Maria; Greenacre, Michael; Primicerio, Raul (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      Change in oceanographic conditions causes structural alterations in marine fish communities, but this effect may go undetected as most monitoring programs until recently mainly have focused on oceanography and commercial species rather than on whole ecosystems. In this paper, the objective is to describe the spatial and temporal changes in the Barents Sea fish community in the period 1992–2004 while ...
    • Changes in softbottom macrofauna communities along environmental gradients 

      Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 1990-12-21)
    • Climate change alters the structure of arctic marine food webs due to poleward shifts of boreal generalists 

      Kortsch, Susanne; Primicerio, Raul; Fossheim, Maria; Dolgov, Andrey V.; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2015-09-02)
      Climate-driven poleward shifts, leading to changes in species composition and relative abundances, have been recently documented in the Arctic. Among the fastest moving species are boreal generalist fish which are expected to affect arctic marine food web structure and ecosystem functioning substantially. Here, we address structural changes at the food web level induced by poleward shifts via ...
    • Climate-driven changes in functional biogeography of Arctic marine fish communities 

      Frainer, André; Primicerio, Raul; Kortsch, Susanne; Aune, Magnus; Dolgov, Andrey V.; Fossheim, Maria; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-11-14)
      Climate change triggers poleward shifts in species distribution leading to changes in biogeography. In the marine environment, fish respond quickly to warming, causing community-wide reorganizations, which result in profound changes in ecosystem functioning. Functional biogeography provides a framework to address how ecosystem functioning may be affected by climate change over large spatial ...
    • Data on European seafood biomass production by country, sectors, and species in 2004–2014 and on ecological characteristics of the main species produced 

      Blanchet, Marie-Anne; Primicerio, Raul; Smalås, Aslak; Arias-Hansen, Juliana; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-30)
      In this data article, we present the 2004–2014 average European seafood production volume by production sector, country, and species. The production data originates from the Food and Agriculture Organisation of the United Nations (FAO) and covers three production sectors: Marine fisheries, marine aquaculture, and freshwater production. We present the main ecological characteristics of each species ...
    • Data on European seafood biomass production by country, sectors, and species in 2004–2014 and on ecological characteristics of the main species produced 

      Blanchet, Marie-Anne; Primicerio, Raul; Smalås, Aslak; Arias-Hansen, Juliana; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-30)
      In this data article, we present the 2004–2014 average European seafood production volume by production sector, country, and species. The production data originates from the Food and Agriculture Organisation of the United Nations (FAO) and covers three production sectors: Marine fisheries, marine aquaculture, and freshwater production. We present the main ecological characteristics of each species ...
    • Food-web structure varies along environmental gradients in a high-latitude marine ecosystem 

      Kortsch, Susanne; Primicerio, Raul; Aschan, Michaela; Lind, Sigrid; Dolgov, Andrey V.; Planque, Benjamin (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-05-17)
      Large-scale patterns in species diversity and community composition are associated with environmental gradients, but the implications of these patterns for food-web structure are still unclear. Here, we investigated how spatial patterns in food-web structure are associated with environmental gradients in the Barents Sea, a highly productive shelf sea of the Arctic Ocean. We compared food webs ...
    • A framework for results-based management in fisheries 

      Nielsen, Kåre Nolde; Aschan, Michaela; Agnarsson, Sveinn; Ballesteros, Marta; Baudron, Alan; Borges, Maria de Fatima; Campos, Aida; Chapela, Rosa; Daníelsdóttir, Anna Kristin; Erzini, Karim; Gregersen, Olavur; Holm, Petter; Lucchetti, Alessandro; Margeirsson, Sveinn; Mendes, Hugo Vilela; Olsen, Petter; Rangel, Mafalda; Sala, Antonello; Santiago, José Luis; Sigurdardottir, Sigridur; Silva, Cristina; Sykes, Daryl; Vidarsson, Jonas Runar; Virgili, Massimo; Wise, Laura; Fernandes, Paul George (Journal article; Tidsskriftartikkel; Peer reviewed, 2017-10-30)
      We present a framework for results-based management (RBM) of commercial fisheries. The core idea of RBM is to reduce micromanagement by delegating management responsibility to resource users. The RBM framework represents an industrial organization approach to co-management and comprises three defining processes, conducted by three independent “agents”: (i) an “authority” defines specific and ...
    • Functional diversity of the Barents Sea fish community 

      Wiedmann, Magnus Aune; Aschan, Michaela; Certain, Gregoire; Dolgov, Andrey V.; Greenacre, Michael; Johannesen, Edda; Planque, Benjamin; Primicerio, Raul (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      This paper provides the first assessment of the functional diversity (FD) of the Barents Sea fish community. FD is recognized as an important driver of ecosystem functions and, thus, governs the adaptability of ecosystems in the face of disturbance. We integrate ecosystem survey data with an extensive trait matrix and show that fish FD displayed large spatial variation. The study period (2004 to ...
    • Functional roles and redundancy of demersal Barents Sea fish: Ecological implications of environmental change 

      Aune, Magnus; Aschan, Michaela; Greenacre, Michael; Dolgov, Andrey V.; Fossheim, Maria; Primicerio, Raul (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-21)
      When facing environmental change and intensified anthropogenic impact on marine ecosystems, extensive knowledge of how these systems are functioning is required in order to manage them properly. However, in high-latitude ecosystems, where climate change is expected to have substantial ecological impact, the ecosystem functions of biological species have received little attention, partly due to the ...
    • Guidelines for co-creating climate adaptation plans for fisheries and aquaculture 

      Pham, Thi Thanh Thuy; Friðriksdóttir, Ragnhildur; Weber, Charlotte Teresa; Viðarsson, Jónas R.; Papandroulakis, Nikos; Baudron, Alan; Olsen, Petter; Arias-Hansen, Juliana; Laksá, Unn; Fernandes, Paul G.; Bahri, Tarub; Ragnarsson, Sigurður Ö; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-02-27)
      Climate change is having a significant impact on the biology and ecology of fish stocks and aquaculture species and will affect the productivity within seafood supply chains in the future. The challenges are further amplified when actors within the fisheries and aquaculture sectors have very different ideas and assumptions about climate change and what risks and opportunities they entail. In order ...
    • How vulnerable is the European seafood production to climate warming? 

      Blanchet, Marie-Anne; Primicerio, Raul; Smalås, Aslak; Arias-Hansen, Juliana; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-10-16)
      The main challenge for the European seafood industry is to ensure sustainable production volume while adapting to climate warming. Marine fisheries mainly target 41 species which account for 80% of the seafood production in Europe. The remaining 20% comes from marine and freshwater aquaculture, which harvest mainly 5 and 11 species, respectively. European seafood production volume (2004–2014) recorded ...
    • Identifying transferable skills to enhance Early Career Researchers employability 

      Weber, Charlotte Teresa; Borit, Melania; Hnatkova, Eva; Parada, Filomena; Johnsen, Hanne R.; Aschan, Michaela (Conference object; Konferansebidrag, 2018)
      Doctoral candidates are facing a diverse employment landscape that shifted significantly in the last decades, with less than 30 % of doctoral graduates working in academia or in research and development related jobs. In addition to becoming more inter-sectoral, working environments are becoming increasingly inter-national and inter-disciplinary. This development can make the employment requirements ...
    • Increased functional diversity warns of ecological transition in the Arctic 

      Frainer, André; Primicerio, Raul; Dolgov, Andrey V.; Fossheim, Maria; Johannesen, Edda; Lind, Sigrid; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-04-07)
      As temperatures rise, motile species start to redistribute to more suitable areas, potentially affecting the persistence of several resident species and altering biodiversity and ecosystem functions. In the Barents Sea, a hotspot for global warming, marine fish from boreal regions have been increasingly found in the more exclusive Arctic region. Here, we show that this shift in species distribution ...
    • An interdisciplinary insight into the human dimension in fisheries models. A systematic literature review in a European Union context 

      Weber, Charlotte Teresa; Borit, Melania; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-07-02)
      Fisheries are complex adaptive social-ecological systems (SES) that consist of interlinked human and ecosystems. They have mainly been studied by the natural sciences and focused on the ecosystem. However, rising concerns about sustainability and increasing complexity of societal challenges often require an understanding of fisheries in a SES context. For this purpose, the study of the human ...
    • Participatory planning and decision support for ecosystem based fisheries management of the west coast of Scotland 

      Nielsen, Kåre Nolde; Baudron, Alan; Fallon, Niall G.; Fernandes, Paul G.; Rahikainen, Mika; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-11-14)
      Mixed fisheries and the marine ecosystems that sustain them are complex entities and involve multiple and potentially conflicting management objectives and stakeholder interests. The presence of multiple trade-offs complicates the identification of strategies that satisfy various policy requirements while being acceptable to affected stakeholder groups. This creates a demand for tools and processes ...
    • Results based management in fisheries: Delegating responsibility to resource users 

      Nielsen, Kåre Nolde; Holm, Petter; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2014-10-31)
      While the notion of results based management has been devoted recent attention in the context of reforming European fisheries management, it remains unclear what it entails. A conceptual model of results based management in fisheries is proposed as a way for public authorities to delegate specific management and documentation responsibilities to resource users. The model comprises three ...
    • The role of marine mammals in the Barents Sea foodweb 

      Blanchet, Marie-Anne; Primicerio, Paul; Frainer, Andrè; Kortsch, Susanne; Skern-Mauritzen, Mette; Dolgov, Andrey V.; Aschan, Michaela (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-08-26)
      Marine mammals are important players in the Barents Sea ecosystem but their structural role in the foodweb has been little explored. We compare foodweb-related characteristics within and between phylogenetic groups for 19 marine mammals. As a group, they directly connect to the most central species (i.e cod and haddock) in the Barents Sea (i.e. cod and haddock) and consume over half of the available ...