Sökning: "Larry Greenberg"

Visar resultat 6 - 10 av 14 avhandlingar innehållade orden Larry Greenberg.

  1. 6. Genetic Variation and Relatedness of Freshwater Pearl Mussel Margaritifera margaritifera L. populations

    Författare :Amra Hadzihalilovic-Numanovic; Larry Greenberg; Nils Ryman; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Margaritifera margaritifera; genetic variation; age structure; genetic distance; Biology; Biologi; Biology; Biologi;

    Sammanfattning : The two papers presented in this thesis focus on population genetic study on freshwater pearl mussel populations in Sweden, using RAPD method. In paper I, I examine genetic variation within and between 5 populations in a single drainage area in south western Sweden. LÄS MER

  3. 7. Behaviour and metabolic rates of brown trout and Atlantic salmon : Influence of food, environment and social interactions

    Författare :Linnea Lans; Larry Greenberg; Eva Bergman; Felicity Huntingford; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Salmo trutta; Salmo salar; behaviour; metabolic rates; Biology; Biologi;

    Sammanfattning : For Atlantic salmon (Salmo salar) and brown trout (Salmo trutta), the decision to migrate or when to migrate is believed to be influenced by the individual’s metabolic rate (MR) relative its food intake. As MR was expected to be related to behaviour, the potential links between behaviour and metabolic costs was studied. LÄS MER

  4. 8. Relations between metabolic rate, migration and behaviour in Atlantic salmon (Salmo salar) and brown trout (Salmo trutta)

    Författare :Linnea Lans; Larry Greenberg; Eva Bergman; Jörgen Johnsson; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Atlantic salmon; brown trout; Standard metabolic rate; behaviour; migration; Ethology and behavioural ecology; Etologi och beteendeekologi; Biology; Biologi;

    Sammanfattning :   ABSTRACT   Migration is common among populations of brown trout (Salmo trutta) and Atlantic salmon (Salmo salar). However, not all individuals in the same population migrate, a phenomenon referred to as partial migration. LÄS MER

  5. 9. Population ecology of perch (Perca fluviatilis) in boreal lakes

    Författare :Arne Linløkken; Eva Bergman; Larry Greenberg; Anders Hargeby; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; perch; growth; size; mortality; temperature; acidification; density; roach; competition; Biology; Biologi; Biology; Biologi;

    Sammanfattning : I studied the effects of temperature, pH, competition and predation on Eurasian perch (Perca fluviatilis) in 30 lakes in Norway during 1981-2001. The study lakes were situated in two different areas in southern Norway; four lakes in Aust-Agder county in southernmost Norway were explored during 1981-1984 and 26 lakes in Hedmark county in south-eastern Norway were investigated during 1992-2001. LÄS MER

  7. 10. 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