Sökning: "predator-prey relationship"

Visar resultat 1 - 5 av 11 uppsatser innehållade orden predator-prey relationship.

  1. 1. Diving Deep: Seabird foraging tactics and local prey field

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Elin Andersson Sjöholm; [2024]
    Nyckelord :Common Guillemot; Uria aalge; Optimal Foraging theory; Hydroacoustic data; resource selection;

    Sammanfattning : Foragers in patchy environments need to decide what patches to use and how to allocate their time between them. Optimal foraging theory describes these choices through the relationship between energy expenditure and energy gain. LÄS MER

  3. 2. Predatoriska fåglars effekt på populationsdynamiken hos amfibier

    Kandidat-uppsats, Högskolan i Halmstad/Akademin för företagande, innovation och hållbarhet

    Författare :Lovisa Melander; [2021]
    Nyckelord :Amphibian population dynamics; amphibian population ecology; birds amphibians; populationsdynamik amfibier; populationsekologi amfibier; predation amfibier; fåglar amfibier;

    Sammanfattning : The global amphibian population is rapidly declining. Although many threats that affect amphibians are known, there are many contributing factors which are not fully understood. For adult amphibians, the largest part of the mortality comes from predation. LÄS MER

  4. 3. Development of northern pike (Esox lucius) populations in the Baltic Sea, and potential effects of grey seal (Halichoerus grypus) predation

    Master-uppsats, SLU/Dept. Of Aquatic Resources

    Författare :Rebecka Svensson; [2021]
    Nyckelord :diet analysis; ; marine mammals; predator-prey; socio-economic; sport fishing; recreational fisheries;

    Sammanfattning : Worldwide, marine mammal populations are increasing after considerable efforts to turn the downward trends caused by hunting, accidental mortality and pollution. The ecosystem effects from the increases of these top predators may be pronounced, but are in most cases poorly known. LÄS MER

  5. 4. Removing noise with an Autoencoder in a Predator-Prey Ordinary Differential Equation

    Kandidat-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Conrad Hildebrand; Michael Mathsson; [2020]
    Nyckelord :;

    Sammanfattning : When studying populations of animals, you might want to try to predict the future population growth of the animals within a region. While there are other factors in play and depending on the looked at species, one of the major factors to look at can be the predator-prey relationship between two species. LÄS MER

  7. 5. Seasonal changes in clupeids maturation constrains the food quality of chicks of the common guillemot (Uria aalge) : A case study of a potential mismatch, from the perspective of the common guillemot chicks on Stora Karlsö, the Baltic Sea

    Master-uppsats, Stockholms universitet/Stockholm Resilience Centre

    Författare :Emelie Delphin; [2018]
    Nyckelord :Common guillemot Uria aalge ; Sprat Sprattus sprattus ; Herring Clupea herengus ; Match-mismatch hypothesis; the Baltic Sea;

    Sammanfattning : Background: Common guillemots are integral elements of the Baltic Sea marine ecosystem. They possess life-history characteristics such as relatively long lifespan, quite low fecundity resulting in only one egg per breeding season – characteristics that make them particularly vulnerable to even small changes in the environment. LÄS MER