• A novel role for pigment genes in the stress response in rainbow trout (Oncorhynchus mykiss) 

      Kahn, Uniza Wahid; Øverli, Øyvind; Hinkle, Patricia M.; Pasha, Farhan Ahmad; Johansen, Ida Beitnes; Berget, Ingunn; Silva, Patricia; Kittilsen, Silje; Höglund, Erik; Omholt, Stig William; Våge, Dag Inge (Journal article; Peer reviewed, 2016)
      In many vertebrate species visible melanin-based pigmentation patterns correlate with high stress- and disease-resistance, but proximate mechanisms for this trait association remain enigmatic. Here we show that a missense ...
    • Assaying waterborne psychoactive drugs by the response to naturalistic predator cues in the stickleback (Gasterosteus aculeatus) 

      Höglund, Erik; Øverli, Øyvind; Åtland, Åse (Peer reviewed; Journal article, 2020)
      Ecotoxicological effects of psychiatric drugs and drug metabolites released by the human population are of increasing environmental concern. In this study we evaluate behavioral responses to visual predator cues in wild ...
    • Bigger is not better: cortisol-induced cardiac growth and dysfunction in salmonids 

      Johansen, Ida Beitnes; Sandblom, Erik; Skov, Peter V.; Gräns, Albin; Ekström, Andreas; Lunde, Ida Gjervold; Vindas, Marco Antonio; Zhang, Lili; Höglund, Erik; Frisk, Michael; Sjaastad, Ivar; Nilsson, Göran Erik; Øverli, Øyvind (Journal article; Peer reviewed, 2017)
      Stress and elevated cortisol levels are associated with pathological heart growth and cardiovascular disease in humans and other mammals. We recently established a link between heritable variation in post-stress cortisol ...
    • Contrasting Coping Styles Meet the Wall: A Dopamine Driven Dichotomy in Behavior and Cognition 

      Höglund, Erik; Silva, Patricia IM; Vindas, Marco Antonio; Øverli, Øyvind (Journal article; Peer reviewed, 2017)
      Individual variation in the ability to modify previously learned behavior is an important dimension of trait correlations referred to as coping styles, behavioral syndromes or personality. These trait clusters have been ...
    • Contrasting neurochemical and behavioral profiles reflects stress coping styles but not stress responsiveness in farmed gilthead seabream (Sparus aurata) 

      Höglund, Erik; Moltesen, Maria; Castanheira, Maria Filipa; Thörnqvist, Per-Ove; Silva, Patricia IM; Øverli, Øyvind; Martins, Catarina; Winberg, Svante (Peer reviewed; Journal article, 2020)
      In fish, as well as in other vertebrates, contrasting suites of physiological and behavioral traits, or coping styles, are often shown in response to stressors. However, the magnitude of the response (i.e. stress responsiveness) ...
    • Coping with a changing environment: The effects of early life stress 

      Vindas, Marco Antonio; Madaro, Angelico; Fraser, Thomas; Höglund, Erik; Olsen, Rolf Erik; Øverli, Øyvind; Kristiansen, Tore S (Journal article; Peer reviewed, 2016)
      Ongoing rapid domestication of Atlantic salmon implies that individuals are subjected to evolutionarily novel stressors encountered under conditions of artificial rearing, requiring new levels and directions of flexibility ...
    • Dietary l-tryptophan leaves a lasting impression on the brain and the stress response 

      Höglund, Erik; Øverli, Øyvind; Andersson, Madelene Åberg; Silva, Patricia; Laursen, Danielle Caroline; Moltesen, Maria M; Krogdahl, Åshild; Schjolden, Joachim; Winberg, Svante; Vindas, Marco Antonio; Mayer, Ian; Hillestad, Marie (Journal article; Peer reviewed, 2017)
      Comparative models suggest that effects of dietary tryptophan (Trp) on brain serotonin (5-hydroxytryptamine; 5-HT) neurochemistry and stress responsiveness are present throughout the vertebrate lineage. Moreover, hypothalamic ...
    • Effects of repeated short episodes of environmental acidification on Atlantic salmon (Salmo salar) from a landlocked population 

      Höglund, Erik; Høgberget, Rolf; Åtland, Åse; Haraldstad, Tormod; Øverli, Øyvind; Vindas, Marco A (Peer reviewed; Journal article, 2021)
      Chronic or repeated exposure to environmental contaminants may result in allostatic overload, a physiological situation in which the costs of coping affect long-term survival and reproductive output. Continuous measurements ...
    • Neuroendocrine indicators of allostatic load reveal the impact of environmental acidification in fish 

      Höglund, Erik; Korzan, Wayne; Åtland, Åse; Haraldstad, Tormod; Høgberget, Rolf; Mayer, Ian; Øverli, Øyvind (Peer reviewed; Journal article, 2020)
      When mobilized from surrounding soils and binding to gills at moderately low pH, aluminum (Al) cations can adversely affect fish populations. Furthermore, acidification may lead to allostatic overload, a situation in which ...
    • Proactive avoidance behaviour and pace-of-life syndrome in Atlantic salmon 

      Damsgård, Børge; Evensen, Tor Hatten; Øverli, Øyvind; Gorissen, Marnix; Ebbesson, Lars O.E.; Rey, Sonia; Höglund, Erik (Journal article; Peer reviewed, 2019)
      Individuals in a fish population differ in key life-history traits such as growth rate and body size. This raises the question of whether such traits cluster along a fast-slow growth continuum according to a pace-of-life ...
    • Tryptophan metabolic pathways and brain serotonergic activity: A comparative review 

      Höglund, Erik; Øverli, Øyvind; Winberg, Svante (Journal article; Peer reviewed, 2019)
      The essential amino acid L-tryptophan (Trp) is the precursor of the monoaminergic neurotransmitter serotonin (5-hydroxytryptamine, 5-HT). Numerous studies have shown that elevated dietary Trp has a suppressive effect on ...