Sökning: "smolt"

Visar resultat 1 - 5 av 17 avhandlingar innehållade ordet smolt.

  1. 1. Migration and quality of landlocked Atlantic salmon smolt : Implications for conservation and management

    Författare :Johnny R Norrgård; Eva Bergman; Larry A Greenberg; Monika Schmitz; Martyn Lucas; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; acoustic telemetry; hatchery; life history; migration mortality; regulated rivers; Salmo salar; salmon; smolt; trout; Biology; Biologi;

    Sammanfattning : Atlantic salmon Salmo salar has a complex life cycle, including long migrations and habitat shifts for both juveniles and adults. As such, salmon populations are vulnerable to habitat degradation and fragmentation along their migratory routes. LÄS MER

  3. 2. Some characteristics of the Baltic salmon (Salmo salar) L., population : individual growth, exploitation pattern and total mortality, from the smolt stage, as revealed by Swedish smolt taggings

    Författare :Per-Olov Larsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Salmon; Lax; Östersjön;

    Sammanfattning : .... LÄS MER

  4. 3. Environmental influences on the behavioural ecology of juvenile salmonids – the importance of rearing density

    Författare :Sofia Brockmark; Göteborgs universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; rearing density; structural complexity; familiarity; antipredator response; limited attention; social status; growth rate; smolt status; fin erosion; post-release performance; hatchery supplementation; brown trout; Atlantic salmon;

    Sammanfattning : Background and aims: Early environmental conditions are known to influence the phenotypic development of animals, including behavioural alterations. The overall aim of this thesis is to investigate the effects of density, social stability and structural complexity on growth, behaviour, and survival in the wild, using juvenile brown trout (Salmo trutta) and Atlantic salmon (Salmo salar) as model species. LÄS MER

  5. 4. Three-dimensional numerical modelling for studying smolt migration in regulated rivers

    Författare :Jaan Kiviloog; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : This licentiate thesis considers the numerical modelling of natural river flow for studying the importance of hydraulics on the outmigration of juvenile salmon and trout (smolt). The construction of power plants and dams in Swedish rivers has led to disturbances in the migration of the fish. LÄS MER

  7. 5. Temporal dynamics of brain and hormone changes during parr-smolt transformation in salmon

    Författare :Lars Ebbesson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; animal morphology; Animal anatomy; growth hormone; metamorphosis; thyroid hormones; neural plasticity; Djurs anatomi och morfologi;

    Sammanfattning : This thesis describes a series of studies designed to elucidate brain circuitry changes during parr-smolt transformation (smoltification) in salmon. The studies revealed sequential orderly chemical and structural changes of the brain. LÄS MER