Browsing NIVA Open Access Archive by Author "Höglund, Erik"
Now showing items 1-20 of 25
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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 ... -
Allostatic Load and Stress Physiology in European Seabass (Dicentrarchus labrax L.) and Gilthead Seabream (Sparus aurata L.)
Samaras, Athanasios; Santo, Carlos Espirito; Papandroulakis, Nikos; Mitrizakis, Nikolaos; Pavlidis, Michail; Höglund, Erik; Pelgrim, Thamar N.M.; Zethof, Jan; Spanings, F.A.Tom; Vindas, Marco A; Ebbesson, Lars O.E.; Flik, Gert; Gorissen, Marnix (Journal article; Peer reviewed, 2018)The present study aimed to compare effects of increasing chronic stress load on the stress response of European seabass (Dicentrarchus labrax) and gilthead seabream (Sparus aurata) to identify neuroendocrine functions that ... -
Anthropogenic and natural size-related selection act in concert during brown trout (Salmo trutta) smolt river descent
Haraldstad, Tormod; Höglund, Erik; Kroglund, Frode; Olsen, Esben Moland; Hawley, Kate Louise; Haugen, Thrond Oddvar (Peer reviewed; Journal article, 2020)By hindering migration and inducing direct turbine mortality during downstream migration, hydropower is regarded as one of the most serious threats to anadromous salmonids. Yet, little attention has been paid to long-term ... -
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 ... -
Assessing Stress Resilience After Smolt Transportation by Waterborne Cortisol and Feeding Behavior in a Commercial Atlantic Salmon (Salmo salar) Grow-Out Recirculating Aquaculture System
Höglund, Erik; Fernandes, Paulo; Rojas-Tirado, Paula Andrea; Rundberget, Thomas; Hess-Erga, Ole-Kristian (Peer reviewed; Journal article, 2022)Sampling protocols and water quality sensors have been developed to assess fish health and welfare in recirculating aquaculture systems (RASs). Still, the use of fish-based non-invasive welfare indicators, reflecting the ... -
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 ... -
Digital Data Help Explain Drivers of Angler Satisfaction: An Example from Southern Norway
Johansen, Kurt; Olsen, Esben Moland; Haraldstad, Tormod; Arlinghaus, Robert; Höglund, Erik (Peer reviewed; Journal article, 2022)We analyzed trip-level self-reports collected by a cell phone app to understand angler satisfaction of fishing for sea trout Salmo trutta (anadromous Brown Trout) in southern Norway. We found no clear support for a positive ... -
Does sedation with AQUI-S® mitigate transport stress and post transport mortality in ballan wrasse (Labrus bergyltae)?
Calabrese, Sara; Jonassen, Thor Magne; Steigum, Endre; Åsnes, Helga Øen; Imsland, Albert; Saude, Carolina Serra; Wergeland, Truls; Höglund, Erik (Peer reviewed; Journal article, 2024)Ballan wrasse (Labrus bergylta) are commonly used as cleaner fish in salmon farms as a biological treatment to mitigate sea lice infestation. Improved welfare for cleaner fish both during production of these fish and when ... -
Early life stress induces long-term changes in limbic areas of a teleost fish: The role of catecholamine systems in stress coping
Vindas, Marco A; Fokos, Stefanos; Pavlidis, Michail; Höglund, Erik; Dionysopoulou, Sylvia; Ebbesson, Lars OE; Papandroulakis, Nikolaos; Dermon, Catherine R (Journal article; Peer reviewed, 2018)Early life stress (ELS) shapes the way individuals cope with future situations. Animals use cognitive flexibility to cope with their ever-changing environment and this is mainly processed in forebrain areas. We investigated ... -
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 ... -
Effekter på laks (Salmo salar) ved eksponering for monokloramin
Hagen, Anders Gjørwad; Hytterød, Sigurd; Olstad, Kjetil; Garmo, Øyvind Aaberg; Darrud, Mari; Holter, Tobias Houge; Martínez Francés, Elena; Höglund, Erik; Uhlig, Silvio; Fæste, Christiane Kruse; Ivanova, Lada; Gjessing, Mona Cecilie (NIVA-rapport;7358, Research report, 2019)Det er gjort flere eksperimentelle forsøk med formål å utvikle klor som behandling mot Gyrodactylus salaris i elver. Gjennom disse forsøkene er det funnet at svært lave konsentrasjoner av klor tilsatt som monokloramin, kan ... -
Empirical support for sequential imprinting during downstream migration in Atlantic salmon (Salmo salar) smolts
Haraldstad, Tormod; Forseth, Torbjørn; Olsen, Esben M.; Haugen, Thrond O.; Höglund, Erik (Peer reviewed; Journal article, 2022)The precise homing of Atlantic salmon to their natal river and spawning grounds is the foundation for locally adapted genetically differentiated populations across rivers or across river sections. A sequential imprinting ... -
Hydrogen sulphide dynamics in recirculating aquaculture systems with moving or fixed bed biofilters: A case study in two commercial salmon smolt producing farms in Norway
Fernandes, Paulo; Steigum, Endre; Höglund, Erik; Rojas-Tirado, Paula Andrea; Åtland, Åse (Peer reviewed; Journal article, 2024)Sudden mass mortalities of fish reared in recirculating aquaculture systems (RAS) have occurred in recent years. High total dissolved sulphide (H2S + HS- + S2-) levels in the rearing water have been suggested as an underlaying ... -
Hydropower-induced selection of behavioural traits in Atlantic salmon (Salmo salar)
Haraldstad, Tormod; Haugen, Thrond Oddvar; Olsen, Esben M.; Forseth, Torbjørn; Höglund, Erik (Peer reviewed; Journal article, 2021)Renewable energy projects such as hydropower facilities contribute towards meeting the world`s growing energy demands and urgent need for mitigating climate change. However, such infrastructure has the potential to ... -
Increasing the dietary n-6/n-3 ratio alters the hepatic eicosanoid production after acute stress in Atlantic salmon (Salmo salar)
Hundal, Bjørg Kristine; Liland, Nina Sylvia; Rosenlund, Grethe; Höglund, Erik; Araujo, Pedro; Stubhaug, Ingunn; Sissener, Nini (Peer reviewed; Journal article, 2021)Earlier studies have indicated that a high inclusion of n-6 fatty acids (FA) in feeds for Atlantic salmon can affect the stress response. To test this hypothesis, Atlantic salmon (Salmo salar) were fed diets containing ... -
Migratory passage structures at hydropower plants as potential physiological and behavioural selective agents
Haraldstad, Tormod; Haugen, Thrond Oddvar; Kroglund, Frode; Olsen, Esben Moland; Höglund, Erik (Peer reviewed; Journal article, 2019)