Sökning: "long-distance migration"

Visar resultat 1 - 5 av 29 avhandlingar innehållade orden long-distance migration.

1. 1. Time and energy in long-distance bird migration

   Författare :Thord Fransson; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zoologi; Zoology;

   Sammanfattning : Long-distance seasonal migration is energetically demanding and time consuming. For example, some passerine birds are on migration during six months of the year, travel more than 10 000 km and make use of many fuelling sites. Migration requires many different decisions, and an individual bird will face a variety of situations. LÄS MER

3. 2. New motives for migration? : On interregional mobility in the nordic context

   Författare :Emma Lundholm; Gunnar Malmberg; Kerstin Westin; Allan Findley; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; interregional migration; migration motives; migration outcomes; commuting; Human geography; Kulturgeografi;

   Sammanfattning : The subject of this thesis is migrants’ motives and the outcomes of interregional migration, as well as how the propensity for interregional migration has changed for different groups over the past three decades. The background consists of a discussion on the role of the labour market in long-distance migration decisions and a discussion on how social and economic change affect the context in which migration decisions are made. LÄS MER

4. 3. Moult strategies in relation to migration in long-distance migrants

   Författare :Susanna Hall; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Flyttfåglar;

   Sammanfattning : .... LÄS MER

5. 4. Reluctant Victims into Challengers : Narratives of a Kurdish Political Generation in Diaspora in Sweden

   Författare :Charlotta Zettervall; Sociologi; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; International Migration; Long-Distance Nationalism; Diaspora; Nationalism; Kurds; Political Generations; Refugees;

   Sammanfattning : This thesis concerns a sociological analysis on the role of generations in the processes of the construction of national identities, and long-distance nationalism in diasporic settings. The empirical case taken is a political generation of Kurds from Turkey who once arrived in Sweden as political refugees. LÄS MER

7. 5. Adaptive flexibility in migratory behaviour of shorebirds

   Författare :Johanna Grönroos; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bird migration; compensation; departure decision; flight distance; migration speed; migration strategy; orientation; shorebird; stopover; wind drift; wind selectivity;

   Sammanfattning : The phenomenon of bird migration has long fascinated us humans and it has prompted questions like where do they go or come from and how do they find their way? Arctic shorebirds are well known for their spectacular long-distance migrations with some species travelling more than 10 000 km every spring and autumn, and some even cover this distance in one single nonstop flight. The aim of my thesis was to investigate the flexibility of Arctic shorebirds when it comes to orientation behaviour, departure behaviour and migration strategy. LÄS MER