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Visar resultat 1 - 5 av 7 avhandlingar som matchar ovanstående sökkriterier.

1. 1. Polyterritorial behaviour and polygyny in the wood warbler (Phylloscopus sibilatrix - Bechst.)

   Författare :Hans Temrin; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; wood warbler; Grönsångare; Tättingar;

   Sammanfattning : .... LÄS MER

3. 2. Parasite impact on reproductive success in the great tit, Parus major

   Författare :Klas Allander; Uppsala universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Tättingar; Passeriformes; Reproduktion;

   Sammanfattning : .... LÄS MER

4. 3. Parasites, reproductive success and health status in birds

   Författare :Reija Dufva; Uppsala universitet; []
   Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Tättingar; Passeriformes; Reproduktion; Tvåvingar; Diptera; Loppor; Siphonaptera; Synekologi;

   Sammanfattning : .... LÄS MER

5. 4. Flight Behaviour of Passerines on Nocturnal Migration

   Författare :Cecilia Nilsson; Evolutionär ekologi; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bird migration; Passerines; Flight Behaviour; Tracking radar; Optimal migration; Flight speed; Airspeed; Wind drift; Nocturnal migration; Coastline effects; Flight directions; Reverse migration;

   Sammanfattning : Many passerines migrate during the night and at high altitudes, making their migration difficult to observe. By using tracking radars we have been able to make exact observations of the flight behaviour of passerines on nocturnal migration, which has enabled us to test several hypotheses about adaptive values and constraints regarding migratory behaviour in different ecological contexts. LÄS MER

7. 5. A new perspective on avian phylogeny - a study based on mitochondrial genomes

   Författare :Anna Bartosch-Härlid; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Genetics; thyroid; neoteni; mitochondrial DNA; phylogeny; Class Aves; Palaeognathae; cytogenetics; Genetik; cytogenetik;

   Sammanfattning : The Class Aves (birds) is generally divided into two main groups - the Palaeognathae and the Neognathae. Paleognathous birds are the flightless ratites and the tinamous, while Neognathae include all other extant birds (more than 9,000 species). LÄS MER