Sökning: "zoologisk ekologi"

Visar resultat 6 - 10 av 57 avhandlingar innehållade orden zoologisk ekologi.

  1. 6. Evolution of host repertoires and the diversification of butterflies

    Författare :Mariana Pires Braga; Niklas Janz; Sören Nylin; Fredrik Ronquist; Alexandre Antonelli; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; coevolution; host-parasite interaction; inference; networks; zoologisk ekologi; Animal Ecology;

    Sammanfattning : All herbivorous insects are specialized to some extent to their host plants, but the level of specialization varies greatly. Insect-plant coevolution is often invoked to explain the large diversity of herbivorous insects, but the role of specialization during diversification is still controversial. LÄS MER

  3. 7. Spatial and temporal population dynamics in the mountain tundra – mesopredator and prey

    Författare :Rasmus Erlandsson; Anders Angerbjörn; Dennis Murray; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; population dynamics; cyclic; mountain tundra; arctic fox; Norwegian lemming; small rodents; mesopredator; predation; survival; reproduction; zoologisk ekologi; Animal Ecology;

    Sammanfattning : It is well known that competition, predation and fluctuating food resources can have strong effect on individual fitness and population dynamics. The complexity of natural systems can make it complicate to disentangle those processes, but environments with relatively simple food webs, and strong cyclic population dynamics offer contrasting conditions resembling experimental treatments. LÄS MER

  4. 8. Ecology, tourism and management of harbour seals (Phoca vitulina)

    Författare :Sandra M. Granquist; Anders Angerbjörn; Per-Åke Nilsson; Hrefna Sigurjónsdóttir; Arne Bjørge; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Harbour seals; Phoca vitulina; ecology; tourism; wildlife; disturbance; zoologisk ekologi; Animal Ecology;

    Sammanfattning : In cases where human and wildlife are co-using the same geographical areas and resources, management issues often get complex and stakeholder conflicts are common. The Icelandic harbour seal (Phoca vitulina) population is rapidly decreasing, but direct culling of seals still occurs. LÄS MER

  5. 9. Conservation, personality and ecology of the European mink (Mustela lutreola)

    Författare :Marianne Haage; Bodil Elmhagen; Anders Angerbjörn; Kaarina Kauhala; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; European mink; Mustela lutreola; Conservation; Personality; Individual specialism; Diet; American mink; Neovison vison; Intraguild competition; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Loss of biodiversity is a growing problem and hence conservation of species is becoming increasingly important. In this dissertation conservation issues related to the critically endangered European mink (Mustela lutreola) are examined in situ (in the wild) and ex situ (in captivity) on both an individual and community level. LÄS MER

  7. 10. Dynamics of inbreeding and genetic rescue in a small population

    Författare :Malin Hasselgren; Karin Norén; Carles Vilà; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; inbreeding; inbreeding depression; genetic rescue; fitness; genomics; conservation genetics; mutational load; arctic fox; pedigree; gene flow; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Isolation at small population size can reduce individual fitness and impede population growth caused by inbreeding and genetic drift (i.e. inbreeding depression). Inbreeding depression can however be circumvented by gene flow from unrelated individuals through masking of recessive deleterious alleles and contribute to population persistence (i. LÄS MER