Search for dissertations about: "brown trout Salmo trutta"

Showing result 1 - 5 of 44 swedish dissertations containing the words brown trout Salmo trutta.

  1. 1. Divergent Stress Coping Strategies in Brown trout (Salmo trutta)

    Author : Daniel Brelin; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Stress coping; Salmo trutta; Brown trout; teleost fish; stress response; noradrenalin; adrenalin; dopamine; cortisol; hypoxia; confinement; resident-intruder; Animal physiology; Zoofysiologi;

    Abstract : .... READ MORE

  2. 2. Migration in anadromous brown trout

    Author : David Aldvén; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : Downstream migration; Temperature; Discharge; Genetics; Growth rate; Climate change; Salmo trutta; Salmo salar; Sea trout; Salmon; Biology; Ecology;

    Abstract : This thesis investigates the anadromous migration of brown trout (Salmo trutta) with the overall aim to improve stock management within the region. Several field studies were conducted in different streams and coastal areas on the west coast of Sweden specifically aimed to evaluate environmental triggers for migration (Paper I), migration pathways and strategies (Paper III and IV) as well as the genetic differentiation of anadromous populations of brown trout (Paper V). READ MORE

  3. 3. Stress Coping Strategies in Brown Trout (Salmo Trutta): Ecological Significance and Effects of Sea-Ranching

    Author : Daniel Brelin; Svante Winberg; Erik Petersson; Jörgen Johnsson; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Zoophysiology; Stress-coping-strategies; Animal-personalities; Behavioral-syndromes; Brown trout; Salmo trutta; Catecholamines; Sexual maturation; Hatchery; Phenotype; Learning; Zoofysiologi; Biology; Biologi;

    Abstract : Two distinct stress coping strategies, proactive and reactive, have been stated in various animal studies, each associated with a set of behavioural and physiological characteristics. In a given challenging situation, proactive animals show more aggression, a higher general activity and a predominant sympathetic reaction. READ MORE

  4. 4. Spatio-temporal genetic variation in brown trout (Salmo trutta) : microevolutionary studies with particular focus on effective population size, temporal stability, and local adaptation

    Author : Stefan Palm; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Brown trout; Fiskar; Öring; Populationsstudier;

    Abstract : .... READ MORE

  5. 5. Age-class interactions in Atlantic salmon and brown trout: Effects on habitat use and performance

    Author : Rasmus Kaspersson; Göteborgs universitet; Göteborgs universitet; Gothenburg University; []
    Keywords : competition; inter-cohort; density-dependence; growth; habitat; Salmo trutta; Salmo salar; salmon; trout;

    Abstract : This thesis investigates the underlying mechanisms and the density-regulatory effects of age-class interactions, using juvenile Atlantic salmon (Salmo salar L.) and brown trout (Salmo trutta L.) as study species. READ MORE