Sökning: "Long-distance migrant"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Long-distance migrant.

  1. 1. Reproduction and moult in pied and collared flycatchers (Ficedula hypoleuca and F. albicollis) : A life-history approach

    Författare :Christer Hemborg; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; Breeding time; Costs of reproduction; Long-distance migrant; Moult-breeding overlap; Sexual conflict; Survival probability; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi; Animal Ecology; zooekologi;

    Sammanfattning : This thesis examines the trade-offs between investments in reproduction and self-maintenance (moult) in pied and collared flycatchers (Ficedula hypoleuca and F. albicollis). These two long-distance migratory passerine bird species were studied on the breeding grounds in Fennoscandia and in England. LÄS MER

  3. 2. Individual consistency in bird migration

    Författare :YANNIS VARDANIS; Evolutionär ekologi; []
    Nyckelord :bird migration; telemetry; bird ringing; individual consistency; repeatability; site fidelity; routes; timing; annual cycle; meta-analysis;

    Sammanfattning : Slight differences, which appear in the individual animals of the same species and population have been recognised and appreciated ever since Darwin. These consistent intra-specific differences in animals have been considered very important because they are often inherited, and thus, provide the basic material for evolution to act on. LÄS MER

  4. 3. Making a life: Meanings of migration in Cape Verde

    Författare :Lisa Åkesson; Göteborgs universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; anthropology; Cape Verde; culture of migration; transnationalism; sending country perspective; kinship; life-making;

    Sammanfattning : This anthropological study examines the meanings and practices associated with migratin in Cape Verde, and the social an historical space in which these are produced. More specifically, it analyses an ideology of migration that concerns collective experiences of Cape Verde's history, political economy, ecology and geography as well as notions about the life of the person. LÄS MER

  5. 4. Rates and patterns of genome evolution in Lepidoptera

    Författare :Karin Näsvall; Niclas Backström; Simon Martin; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chromosomal rearrangements; karyotype evolution; recombination rate; Lepidoptera; genome structure; molecular evolution; Biology with specialization in Evolutionary Genetics; Biologi med inriktning mot evolutionär genetik;

    Sammanfattning : The evolutionary consequences of genome restructuring and chromosomal rearrangements can be significant, but the underlying mechanisms are poorly understood. This thesis explores the relationships between genome restructuring, recombination, and maintenance of genetic diversity in different butterfly species. LÄS MER

  7. 5. Extending dynamic vegetation models to simulate range shifts

    Författare :Deborah Zani; BECC: Biodiversity and Ecosystem services in a Changing Climate; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dynamic vegetation model; range shift; migration; paleovegetation;

    Sammanfattning : In response to rapid climate change and increasing human pressure, a wide variety of taxa have shifted their distribution in the past decades (range shift), with important consequences for ecosystem services and human health and economy. However, it is not yet clear whether most species will be able to track their favourable habitats or lag behind the climate signal (migration lag). LÄS MER