Browsing NTNU Open by Author "Robertsen, Grethe"
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Can variation in standard metabolic rate explain context- dependent performance of farmed Atlantic salmon offspring?
Robertsen, Grethe; Reid, Donald; Einum, Sigurd; Aronsen, Tonje; Fleming, Ian A.; Sundt-Hansen, Line Elisabeth Breivik; Karlsson, Sten; Kvingedal, Eli; Ugedal, Ola; Hindar, Kjetil (Journal article; Peer reviewed, 2018)Escaped farmed Atlantic salmon interbreed with wild Atlantic salmon, leaving off- spring that often have lower success in nature than pure wild salmon. On top of this, presence of farmed salmon descendants can impair ... -
Dynamisk minstevannføring i et miljødesignperspektiv: Kobling av hydrologiske og biologiske faktorer
Sundt-Hansen, Line; Robertsen, Grethe; Schönfelder, Lennart; Ugedal, Ola (HydroCen Rapport;50, Research report, 2024)Laksen er tilpasset et liv i rennende vann og til et sesongmønster avhengig av hvilken elv og bestand den kommer fra. Regulerte elver har et vannføringsmønster som kan avvike fra det naturlige og i mange tilfeller er det ... -
Innsamling og sammenstilling av relevant kunnskap om Sognefjorden
Solbakken, Roar; Henriksen, Kristian; Reitan, Kjell Inge; Arff, Johanne; Ellingsen, Ingrid H.; Hindar, Kjetil; Fiske, Peder; Robertsen, Grethe; Finstad, Bengt; Aas, Øystein; Johnsen, Bjørn Ove (Research report, 2011)Rapporten er utarbeidet av SINTEF Fiskeri og havbruk i samarbeid med Norsk institutt for naturforskning. Rapporten har kartlagt status og kunnskapshull relatert tit Sognefjorden på områdene: • Akvakultur • Anadrom laksefisk ... -
Is there genetic variation in the response to competition intensity in juvenile brown trout Salmo trutta?
Robertsen, Grethe; Kvingedal, Eli; Einum, Sigurd (Journal article; Peer reviewed, 2011)Effects of intraspecific competition intensities on the relative performance (growth and movement) of juvenile brown trout Salmo trutta originating from nine different families were tested in tank experiments and in ... -
Offspring size effects vary over fine spatio-temporal scales in Atlantic salmon (Salmo salar)
Robertsen, Grethe; Skoglund, Helge; Einum, Sigurd (Journal article; Peer reviewed, 2013)Classic offspring-size theory predicts that a single level of investment per offspring maximizes parental reproductive success in a given environment. Yet, substantial variation in offspring size is often observed among ... -
Relative performance of salmonid phenotypes across environments and competitive intensities
Robertsen, Grethe (Doktoravhandlinger ved NTNU, 1503-8181; 2011:132, Doctoral thesis, 2011) -
Spatial variation in the relationship between performance and metabolic rate in wild juvenile Atlantic salmon
Robertsen, Grethe; Armstrong, JD; Nislow, KH; Herfindal, Ivar; Mckelvey, S; Einum, Sigurd (Journal article; Peer reviewed, 2014)Maintenance of metabolic rate (MR, the energy cost of self-maintenance) is linked to behavioural traits and fitness and varies substantially within populations. Despite having received much attention, the causes and ...