Sökning: "iteroparous"

Hittade 3 uppsatser innehållade ordet iteroparous.

  1. 1. Downstream migration and survival of Atlantic salmon (Salmo salar L.) kelts and fallbacks when passing a hydropower plant

    Master-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Frans Byström; [2020]
    Nyckelord :migration; kelt; iteroparous; anthropogenic obstacle; survival; turbine passage;

    Sammanfattning : Repeat spawners of Atlantic salmon may be of great importance for population stability, the return spawners can significantly contribute to recruitment of juveniles. To have a significant proportion of repeat spawners in the population, it is necessary that salmons can successfully migrate back to the sea after spawning upriver. LÄS MER

  3. 2. Highway To Hell: Can a bubble barrier guide descending salmonid kelt to safety?

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Jonathan Nordin; [2020]
    Nyckelord :bubble barrier; non-physical barrier; fish passage; fish migration; hydropower; bubbelbarriär; icke-fysisk fiskledare; lax; öring; fiskvandring; vattenkraft;

    Sammanfattning : Loss of connectivity in riverine systems due to construction of hydropower dams has resulted in a worldwide decline of anadromous salmonid species such as Atlantic salmon (Salmo salar L.) and sea trout (Salmo trutta L.). The future of these species depend on the presence of available spawning habitat in freshwater river systems. LÄS MER

  4. 3. The effect of migratory fish on freshwater ecosystem nutrient dynamics

    Magister-uppsats, SLU/Dept. of Wildlife, Fish and Environmental Studies

    Författare :Magnus Enbom; [2015]
    Nyckelord :marine-derived-nutrients; Atlantic salmon; sea trout; Baltic Sea; stable isotopes;

    Sammanfattning : Anadromous fish are often important vectors for nutrient fluxes between marine and freshwater ecosystems. These nutrients, termed as marine-derived nutrients (MDN), enter the stream in the form of eggs, sperm, waste and adult carcasses. LÄS MER