Sökning: "Predator"

Visar resultat 21 - 25 av 227 uppsatser innehållade ordet Predator.

  1. 21. Top - down control: parasitism and predation on Gonyostomum semen in Swedish brown water lakes

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Ingrid Bergman; [2022]
    Nyckelord :limnology; phytoplankton; top-down control;

    Sammanfattning : Gonyostomum semen is a raphidophyte microalgae that can be found in brown water lakes all over Sweden. The species forms substantial summer blooms that can completely dominate the phytoplankton community, largely due to its limited grazing pressure. To test whether parasites control the abundance of G. LÄS MER

  3. 22. Besökarpåverkan och hägnutnyttjande hos röd panda (Ailurus fulgens) på Nordens Ark

    Kandidat-uppsats, SLU/Dept. of Animal Environment and Health

    Författare :Tove Brohede; [2022]
    Nyckelord :Röd panda; Ailurus fulgens; besökarpåverkan; hägnutnyttjande; välfärd; djurpark;

    Sammanfattning : Visitors at zoos have an effect on zoo animals' behaviour and enclosure utilisation. This is something that most studies agree on, but whether that effect is positive or negative is disputed and seems to depend on many different elements ranging from species to habitat to routines at the zoo. LÄS MER

  4. 23. A predator´s diet : prey composition analysis of Atlantic bluefin tuna in Skagerrak and Kattegat

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

    Författare :William Jaktén Langert; [2022]
    Nyckelord :Atlantic bluefin tuna; stomach content analysis; fisheries;

    Sammanfattning : Atlantic bluefin tuna is an efficient predator and was a common pelagic species in the north-east Atlantic, including the North Sea and the areas of Skagerrak and Kattegat, in the first half of the 20th century. Following a population collapse in the 1960s, the tuna disappeared from Skagerrak and Kattegatt, however in recent years the tuna has returned to these waters following successful management. LÄS MER

  5. 24. How does habitat selection by brown bear (Ursus arctos) during the berry season change due to forestry and human disturbance : looking at three different periods of human dis-turbances

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

    Författare :Jeanette Jonsson; [2022]
    Nyckelord :Brown bear; Ursus arctos; integrated step selection function; habi-tat selection;

    Sammanfattning : Brown bear (Ursus arctos) is the most widespread large carnivore. It is an apex predator and does not have natural enemies but is hunted by humans in Sweden. During the period July to October their main food resource is bilberry, which contains carbohydrates that are important for their fat resources before entering hibernation. LÄS MER

  7. 25. Brain morphology and behavioural variation in relation to habitat and predation risk in minnows (Phoxinus phoxinus)

    Master-uppsats, Uppsala universitet/Limnologi; Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Marina Gallego González; [2022]
    Nyckelord :brain size; Ecology; environmental complexity; European minnow; fish; geometric morphometrics; morphological divergence; phenotypic plasticity; schooling.;

    Sammanfattning : So far, research on inter- and intraspecific teleost brain plasticity across different freshwater environments has been widely conducted. However, insights of brain morphological variation on social and predator avoidance behaviours are lacking. LÄS MER