Sökning: "birds"

Visar resultat 11 - 15 av 342 avhandlingar innehållade ordet birds.

  1. 11. On urbanisation and birds : Insights from a molecular and physiological perspective

    Författare :Pablo Salmon; Evolutionär ekologi; []
    Nyckelord :Air Pollution; Antioxidants; Birds; great tit Parus major; Local adaptation; Nitrogen oxides; Oxidative stress; Parallel evolution; Survival; Telomere dynamics; Telomeres; Urbanisation;

    Sammanfattning : Urbanisation of natural habitats is rapidly intensifying and poses a potential global threat for wildlife. Thus, it is important to explore its impact on wildlife in order to understand the present and future threats and how resilient organisms are to them. LÄS MER

  3. 12. There and Back Again - nocturnal migratory behaviour of birds during spring and autumn

    Författare :Håkan Karlsson; Biologiska institutionen; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; migration; seasons; flight; orientation; navigation; behaviour; strategies; birds; nocturnal;

    Sammanfattning : This dissertation explores the migratory behaviour of nocturnally migrating passerines and common swifts (Apus apus). Birds passing Lund (southern Sweden) and Abisko (northernmost Scandinavia) where sampled using tracking radar. The aim has been to investigate potential diverging strategies between spring and autumn migration. LÄS MER

  4. 13. The Soapstone Birds of Great Zimbabwe : Archaeological Heritage, Religion and Politics in Postcolonial Zimbabwe and the Return of Cultural Property

    Författare :Edward Matenga; Paul Sinclair; Aron Mazel; Uppsala universitet; []
    Nyckelord :soapstone Birds; Great Zimbabwe; archaeological heritage; cultural property; return of cultural property; cultural symbols; cultural rights; postcolonial theory; western hegemonic discourse; authorized heritage discourse AHD ; nationalism; fait accompli; natural justice; collecting; materiality theory; Archaeology; Arkeologi;

    Sammanfattning : At least eight soapstone carvings of birds furnished a shrine, Great Zimbabwe, in the 19th century. This large stonewalled settlement, once a political and urban centre, had been much reduced for four centuries, although the shrine continued to operate as local traditions dictated. LÄS MER

  5. 14. Influenza A virus in wild birds

    Författare :Anders Wallensten; Björn Olsen; Lennart Svensson; Åke Lundkvist; Mikael Berg; Linköpings universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Influenza A virus; Wild Birds; Ducks; Prevalence; Ecology; Virology; Virologi;

    Sammanfattning : Influenza virus is a RNA virus that exists as different types and subtypes. Influenza A virus strains are known to cause disease in several bird and mammalian species. Wild birds are believed to constitute the natural reservoir for influenza A virus. LÄS MER

  7. 15. The Effects of Mutation and Selection on the Rate and Pattern of Molecular Evolution in Birds

    Författare :Sofia Berlin; Hans Ellegren; Adam Eyre-Walker; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Molecular genetics; substitution rate; diversity; selection; male mutation bias; birds; Genetik; Genetics; Genetik;

    Sammanfattning : By comparing sequence diversity and divergence on sex chromosomes one can study how the rate of evolution in affected by mutation and/or selection. The rate of mutation in male biased, meaning that relatively more mutations are created in the male germ line than in the female. LÄS MER