Sökning: "Salmonid"

Visar resultat 16 - 20 av 44 avhandlingar innehållade ordet Salmonid.

  1. 16. Behavioural Effects and Central Nervous System Actions of Growth Hormone in Salmonid Fish

    Författare :Viktoria Johansson; Göteborgs universitet; []
    Nyckelord :growth hormone; dopamine; central nervous system; cerebrospinal fluid; behaviour; rainbow trout; Atlantic salmon; brown trout; salmonids; teleosts; fish;

    Sammanfattning : .... LÄS MER

  3. 17. The intestinal epithelium of salmonids : transepithelial transport, barrier function and bacterial interactions

    Författare :Fredrik Jutfelt; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Epithelial barrier function; smoltification; cortisol; osmoregulation; Aeromonas salmonicida; Atlantic salmon; rainbow trout; bacterial translocation; intestine; Ussing chamber; vegetable lipids;

    Sammanfattning : The salmonid intestinal epithelium is important for growth and health of the fish. The epithelium is exposed to a multitude of internal and external factors that can influence its function. LÄS MER

  4. 18. Winter behaviour of stream salmonids: effects of temperature, light, and ice cover

    Författare :Johan Watz; Larry Greenberg; Eva Bergman; John Piccolo; Svein Jakob Saltveit; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; stream salmonids; winter behaviour; efftect of temperatur; light; ice cover; environment; fish populations; Biology; Biologi;

    Sammanfattning : In boreal streams, stream salmonids typically face low water temperatures and variable ice conditions during winter, and thus stream salmonids are expected to use different behavioural strategies to cope with these environmental conditions. The studies presented in this thesis explore how temperature, light intensity, and surface ice affect salmonid behaviour, with focus on drift-feeding and ventilation rates. LÄS MER

  5. 19. Conservation of landlocked Atlantic salmon in a regulated river : Behaviour of migratory spawners and juveniles

    Författare :Anna Hagelin; Eva Bergman; Fleming Ian; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atlantic salmon; conservation; migration; spawning; hydropower; competition; juveniles; brown trout; hatchery reared; fallback; delay; Biology; Biologi;

    Sammanfattning : Hydropower dams represent one of the major threats to river ecosystems today. The dams block migratory routes in many rivers, which is problematic for migratory fish species. Trap-and-transport may be an alternative to fish passage solutions, as a strategy to compensate for lost river connectivity. LÄS MER

  7. 20. Environmental, nutritional and endocrine regulation of metabolic processes in fish

    Författare :Andreas Kullgren; Göteborgs universitet; []
    Nyckelord :lipids; metabolism; temperature; fasting; growth hormone; ghrelin; NMR; metabolomics; Salmo salar; Oncorhynchus mykiss;

    Sammanfattning : Due to seasonal variations in temperature and food availability, fish in temperate regions should be able to make metabolic adjustments to ensure that enough energy is available for the maintenance of basal processes. The major aim of this thesis was to elucidate how the physiology and lipid metabolism of salmonid fish is affected by temperature and food availability, and to clarify aspects of the endocrine control of lipid metabolism. LÄS MER