Sökning: "Cecilia Kullberg"

Visar resultat 1 - 5 av 7 avhandlingar innehållade orden Cecilia Kullberg.

  1. 1. Behaviour under predation risk in birds

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

    Sammanfattning : 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. LÄS MER

  3. 2. Representationer av tal i bråkform : En studie om matematikundervisning på mellanstadiet

    Författare :Cecilia Sveider; Joakim Samuelsson; Jonas Hallström; Angelica Kullberg; Yvonne Liljekvist; Linköpings universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; mathematics classroom; representations; fractions; variation theory; mathematics education; middle school; matematikklassrum; representationer; tal i bråkform; variationsteori; matematikdidaktik; mellanstadiet;

    Sammanfattning : Syfte med avhandlingen är att skapa förståelse för lärares undervisning om tal i bråkform på mellanstadiet. Avhandlingen består av två delstudier. I delstudie I studeras hur lärare och elever använder laborativa material för att representera tal i bråkform. LÄS MER

  4. 3. Escape flight in butterflies

    Författare :Maria Almbro; Cecilia Kullberg; Ronald Rutowski; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Flight; Lepidoptera; gamete load; lipid accumulation; predation risk; hibernation; Biology; Biologi; zoologi; Zoology;

    Sammanfattning : Flight is considered to be the overarching reason for the enormous diversity and world-wide abundance of insects. Not only does flight enable great distances to be covered and new areas to be colonised, flying has also evolved to be important in most adult life-history characteristics from reproduction to anti-predator strategies. LÄS MER

  5. 4. Climate change effects on migratory birds and on the ecology and behaviour of the willow warbler (Phylloscopus trochilus)

    Författare :Johanna Hedlund; Sven Jakobsson; Thord Fransson; Cecilia Kullberg; Sara Cousins; Martin Schaefer; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; climate change; bird migration; ecology; phenology; bird; avian; willow warbler; chaffinch; land use change; landscape ecology; historical ecology; etologi; Ethology;

    Sammanfattning : Recent global climate change is influencing the behaviour and ecology of species worldwide. Birds are typical systems to study in this context, as they are often migratory and thus subjected to a variety of environmental effects. LÄS MER

  7. 5. Avian migration: the role of geomagnetic cues

    Författare :Ian Henshaw; Cecilia Kullberg; Thomas Alerstam; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; geomagnetic cues; orientation; food intake; fuel deposition; corticosterone; endogenous time program; bird migration; Biology; Biologi; etologi; Ethology;

    Sammanfattning : The regularity and scale of bird migrations has impressed mankind for generations. Birds rely on an inherited migratory program to guide them during the journey; however, recent evidence suggests that additional external cues are necessary. LÄS MER