Browsing Brage IMR by Author "Höglund, Erik"
Now showing items 1-12 of 12
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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 ... -
Brain serotonergic activation in growth-stunted farmed salmon: Adaption versus pathology
Vindas, Marco Antonio; Johansen, Ida Beitnes; Folkedal, Ole; Höglund, Erik; Gorissen, Marnix; Flik, Gert; Kristiansen, Tore S; Øverli, Øyvind (Journal article; Peer reviewed, 2016-05-25)Signalling systems activated under stress are highly conserved, suggesting adaptive effects of their function. Pathologies arising from continued activation of such systems may represent a mismatch between evolutionary ... -
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, 2016) -
Coping with Unpredictability: Dopaminergic and Neurotrophic Responses to Omission of Expected Reward in Atlantic Salmon (Salmo salar L.)
Vindas, Marco A.; Sørensen, Christina; Johansen, Ida B.; Folkedal, Ole; Höglund, Erik; Khan, Uniza W.; Stien, Lars Helge; Kristiansen, Tore S.; Braastad, Bjarne O.; Øverli, Øyvind (Journal article; Peer reviewed, 2014-01-17)Comparative studies are imperative for understanding the evolution of adaptive neurobiological processes such as neural plasticity, cognition, and emotion. Previously we have reported that prolonged omission of expected ... -
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 ... -
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 ... -
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 ... -
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 (Journal article; Peer reviewed, 2019)Anthropogenic activities affect fish populations worldwide. River dams have profound impacts on ecosystems by changing habitats and hindering migration. In an effort to counteract such effects, a range of mitigation measures ... -
The social-ecological value of recreational fishing for sea trout; a potential for further development of the experience industry in Aust-Agder? (TROUT XP)
Johansen, Kurt; Moland, Esben; Höglund, Erik (NIVA-rapport, Research report, 2019)Prosjektet undersøkte hvilken betydning det å få sjøørret har for fritidsfiskere i form av fiskeglede og videre hva som er viktig for en god fiskeopplevelse. Bakgrunnen for dette er å få i stand et europeisk samarbeid og ... -
Welfare effects of environmental hypercapnia quantified by indicators based on morphology and allostatic load in Atlantic salmon (Salmo salar)
Höglund, Erik; Folkedal, Ole; Aerts, Johan; Hvas, Malthe; Øverli, Øyvind; Mangor-Jensen, Anders; Vindas, Marco A.; Nilsson, Jonatan; Kristiansen, Tore (Peer reviewed; Journal article, 2023)Water supply is a limited resource in most salmon hatcheries, which is compensated by reduced water flow and oxygenation. However, reduced water exchange can lead to accumulation of CO2, resulting in environmental hypercapnia, ...