Sökning: "laxfiskar"

Hittade 5 avhandlingar innehållade ordet laxfiskar.

  1. 1. Smoltification and early sexual maturation in the Baltic salmon, Salmo salar L

    Författare :Magnus Rydevik; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Lax; laxfiskar; Östersjön;

    Sammanfattning : .... LÄS MER

  3. 2. Salmonid behaviour under winter conditions

    Författare :Johan Watz; Larry Greenberg; Eva Bergman; John Piccolo; Richard Cunjak; Karlstads universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; climate change; drift; energy budget; foraging; grayling; ice cover; lotic; metabolic rate; predation; salmon; stream; stress; temperature; trout; Biology; Biologi;

    Sammanfattning : Winter conditions are believed to play an important role in the population dynamics of northern temperate stream fish, challenging the ability of fish to physiologically and behaviourally adapt. Climate change is predicted to increase both mean temperature and temperature fluctuations, especially during winter, leading to dynamic environmental conditions in terms of river ice production and flow. LÄS MER

  4. 3. The estrogen receptor in fish and effects of synthetic estrogens in the environment - Ecological and evolutionary perspectives and societal awareness

    Författare :Lina Nikoleris; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; the estrogen receptor; salmon evolution and ecology; contraceptives; information gaps; synthetic hormones; EE2; Atlantic salmon Salmo salar ; brown trout Salmo trutta ; roach Rutilus rutilus ;

    Sammanfattning : Synthetic hormones are a group of pharmaceuticals used for various human and animal treatments. However, consumption and disposal of these substances have also given rise to negative effects and environmental problems for organisms in the wild which is why these substances have been classified as estrogenic endocrine-disrupting chemicals (EDCs). LÄS MER

  5. 4. Evolution and Ecology of AhR genes in Atlantic salmon (Salmo salar L.)

    Författare :Maria Hansson; Biodiversitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; AhR genes; Atlantic salmon; gene evolution; phylogenetics; environmental pollutants; Baltic Sea; ecotoxicology; Animal ecology; Djurekologi;

    Sammanfattning : In vertebrates, studies of the aryl hydrocarbon receptor (AhR) have been of particular interest due to its direct involvement in the toxic effects exerted by several environmental pollutants, such as PCB and dioxin. After binding to the toxic molecule, this receptor initiates transcription of several genes that are part of the biotransformation battery but most notably the cytochrome P450 (CYP) genes, which results in an excessive release of oxidative enzymes and free radicals. LÄS MER

  7. 5. Infectious Pancreatic Necrosis Virus (IPNV) - Structural Studies and Methodology

    Författare :Linda Eliasson; Molekylär cellbiologi; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; bacteriology; virology; mycology; Mikrobiologi; bakteriologi; virologi; mykologi; Microbiology; VP2; Glycosylation; Immuno dot blot; IPNV; TCID50;

    Sammanfattning : Infectious pancreatic necrosis virus (IPNV) is a Birnavirus that infects salmonid fish. The infection is usually mortal for fish under six months of age, while older fish become carriers, usually without any signs of infection, and will spread the virus to other susceptible fish and to their offspring. LÄS MER