Search for dissertations about: "Arctic birds"

Showing result 1 - 5 of 15 swedish dissertations containing the words Arctic birds.

  2. 1. On the role of migration for the distribution of arctic birds - a circumpolar perspective

    Author : Sara Henningsson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; bird migration; broad-scale distributions; geographic breeding range; geography of migration; non-breeding range; barriers to migration; Arctic birds; evolution of migration routes;

    Abstract : Flexibility as well as constraints to the evolution of migration routes has the possibility of affecting large-scale patterns of geographical ranges of animals both by facilitating, but sometimes restricting, accessibility to and colonization of new regions. This dissertation concerns the broad-scale effects migration has on the distributional patterns of birds in the Arctic. READ MORE

  4. 2. Magnetic orientation in migratory birds

    Author : Rachel Muheim; Funktionell zoologi; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal ecology; Djurekologi; cue-conflict; clock-shift; cue calibration; geomagnetic field; high Arctic latitudes; Emlen funnel; magnetic compass; magnetoreception; navigation; migration; bird; orientation;

    Abstract : My thesis focuses on magnetic orientation in migratory birds, i.e. how they can perceive information from the Earth’s magnetic field and use it for orientation. READ MORE

  5. 3. Biology of Borrelia garinii Spirochetes

    Author : Pär Comstedt; Sven Bergström; Wolfram R. Zückert; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Borrelia garinii; Lyme borreliosis; birds; migration; reservoir host; complement; Ixodes ricinus; Europe; Asia; infection cycle; Molecular biology; Molekylärbiologi;

    Abstract : Lyme borreliosis is a tick-transmitted infectious disease. The causative agents are spiral-shaped bacteria and the most common sign of infection is a skin rash at the site of the tick bite. READ MORE

  6. 4. Temporal and spatial trends of organohalogens in guillemot (Uria aalge) from North Western Europe

    Author : Hrönn Jörundsdóttir; Åke Bergman; Derek Muir; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Arctic; environmental; monitoring; pollution; time trends; spatial trends; Environmental chemistry; Miljökemi; Environmental Chemistry; miljökemi;

    Abstract : The Arctic and sub-Arctic region of the North Atlantic is a remote area, also in relations to environmental contaminants, such as POPs, BFRs and last but not least, PFCs. Both the BFRs and PFCs are considered emerging pollutants of significant environmental concern. READ MORE

  7. 5. Human Pathogens and Antibiotic Resistant Bacteria in Polar Regions

    Author : Jorge Hernández; Björn Olsen; Lotta Berg; Uppsala universitet; []
    Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ESBL; Antibiotic Resistance; Polar Regions; Wild Birds; Mikrobiologi; Microbiology;

    Abstract : Coincident with human activity in recent decades, human-associated microorganisms have arrived to the Antarctic region, possibly linked to increasing presence of scientific bases and ship-borne tourists. In the Arctic, humans have been present for a very long time, and the few parts of the Arctic without human activities is decreasing with time. READ MORE