Search for dissertations about: "Brown trout"

Showing result 6 - 10 of 61 swedish dissertations containing the words Brown trout.

  2. 6. Forest – stream linkages : Brown trout (Salmo trutta) responses to woody debris, terrestrial invertebrates and light

    Author : Pär Gustafsson; Eva Bergman; Larry Greenberg; Kurt Fausch; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Brown trout; growth; foraging; woody debris; terrestrial invertebrates; light; riparian zone; forestry; stream; Freshwater ecology; Limnisk ekologi; Biology; Biologi;

    Abstract : Forests surrounding streams affect aquatic communities in numerous ways, contributing to energy fluxes between terrestrial and lotic ecosystems. The five papers in this thesis focus on woody debris, terrestrial invertebrates and light, three factors influenced by riparian zone structure, potentially affecting streams and brown trout (Salmo trutta). READ MORE

  4. 7. Individual variation in behaviour: personality and performance of brown trout in the wild

    Author : Bart Adriaenssens; Göteborgs universitet; []
    Keywords : behavioural syndromes; personality; life-history; boldness; hatchery; survival; growth; foraging; anti-predator behaviour; learning; brown trout;

    Abstract : Individuals from the same population often show very different behaviour. These differences, when consistent across time, are referred to as animal personality or behavioural syndromes. Explaining the occurrence of animal personality from an evolutionary perspective has however proven a difficult issue to tackle. READ MORE

  5. 8. Effects of fine woody debris on juvenile brown trout (Salmo trutta) and drifting invertebrates

    Author : Åsa Enefalk; Eva Bergman; Siân Griffiths; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; brown trout; juvenile; stream; woody debris; invertebrates; fine woody debris; Biology; Biologi;

    Abstract : In boreal forest streams, woody debris is an important habitat component. Stream invertebrates and salmonids such as brown trout benefit from in-stream wood. READ MORE

  6. 9. 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 : NATURVETENSKAP; NATURAL SCIENCES; 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

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

    Author : Rasmus Kaspersson; Göteborgs universitet; []
    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