Search for dissertations about: "animal flight"

Showing result 16 - 20 of 25 swedish dissertations containing the words animal flight.

  2. 16. Costs and Tactics in the Evolution of Reproductive Effort

    Author : Ingemar Jönsson; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; capital breeding; Falco tinnunculus; body mass; DEE; reproductive effort; reproductive costs; income breeding; Animal ecology; Djurekologi;

    Abstract : This study focuses on various aspects of costs of reproduction and the evolution of energetic breeding tactics. It emphasizes the distinction between demographic costs of reproduction expressed already before current offspring have reached independence (prebreeding costs), and costs expressed only after offspring independence (postbreeding costs). READ MORE

  4. 17. Ecology of red admiral migration

    Author : Oskar Brattström; Biologiska institutionen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nymphalidae; Lepidoptera; migration patterns; migration; genetic structure; AFLP; lipid content; Inachis io; stable isotopes; orientation; navigation; weather; Animal ecology; red admiral; Vanessa atalanta; Djurekologi;

    Abstract : The red admiral (Vanessa atalanta) is a migratory butterfly that can be found in North America, North Africa, Europe and some parts of Asia. In Europe the main part of the population spend winter in the Mediterranean region and the following spring leave this area to breed further to the north. READ MORE

  5. 18. Attacking predators and fleeing prey : detection, escape and targeting behaviour in birds

    Author : Ulrika Kaby; Innes Cuthill; Stockholms universitet; []
    Keywords : zoology; ethology; birds; animal behaviour;

    Abstract : The aim of this thesis is to further our understanding of predator and prey behaviour and decision making in different attack situations. The thesis deals with escape strategies, predator detection ability and prey targeting behaviour. READ MORE

  6. 19. Differential migration in raptors

    Author : Nils Kjellén; Biodiversitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Osprey; Skua; Population monitoring; Bird migration; Satellite telemetry; Animal ecology; Djurekologi;

    Abstract : Differences between ages, sexes and populations in the timing of migration at Falsterbo, Sweden and in the choice of wintering site among raptors in Scania were investigated. Competition and dominance is the best primary explanation to the results. READ MORE

  7. 20. Behaviour under predation risk in birds

    Author : Cecilia Kullberg; Neil B Metcalfe; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Animal physiology; Zoofysiologi;

    Abstract : Predation is a major selective force in the evolution of both morphological and behavioural characters in animals. The flexibility in behavioural traits according to perceived predation risk has received much attention in recent years. READ MORE