Sökning: "Butterflies"

Visar resultat 1 - 5 av 53 avhandlingar innehållade ordet Butterflies.

  1. 1. Spring Phenology of Butterflies The role of seasonal variation in life-cycle regulation

    Detta är en avhandling från Stockholm : Department of Zoology, Stockholm University

    Författare :Sandra Stålhandske; Stockholms universitet.; [2016]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Phenology; Life cycle regulation; Phenotypic plasticity; Local adaptation; Butterflies; Diapause; Pupal development; Anthocharis cardamines; Herbivore – host plant interaction; etologi; Ethology;

    Sammanfattning : Animals and plants in temperate regions must adapt their life cycle to pronounced seasonal variation. The research effort that has gone into studying these cyclical life history events, or phenological traits, has increased greatly in recent decades. LÄS MER

  2. 2. Fecundity in butterflies : adaptations and constraints

    Detta är en avhandling från Stockholm : Dept. of Zoology [Zoologiska institutionen], Univ

    Författare :Bengt Karlsson; Stockholms universitet.; [1989]
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  3. 3. Allocation of body resources to reproduction in butterflies

    Detta är en avhandling från Stockholm : Zoologiska institutionen

    Författare :Fredrik Stjernholm; Stockholms universitet.; [2005]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Zoology; Ecology; Butterflies; Reproduction; Life histories; Trade-offs; Resource use; NATURAL SCIENCES Biology Terrestrial; freshwater and marine ecology; NATURVETENSKAP Biologi Terrestisk; limnisk och marin ekologi;

    Sammanfattning : The life-history of an organism can be studied and understood in terms of acquisition and expenditure of resources. In butterflies, the use of resources for reproduction has been the focus of much research due to the possibility to easily quantify both the input of resources from different sources over the life-cycle as well as the partitioning of these resources to reproduction. LÄS MER

  4. 4. Antipredator defence in butterflies

    Detta är en avhandling från Stockholm : Department of Zoology, Stockholm University

    Författare :Martin Olofsson; Stockholms universitet.; [2013]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Antipredator defence; Bird; Crypsis; Predator; Predator-prey interaction; Prey-attack behavior; Butterfly; Deimatic behavior; Eyespots; Startle display; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Predation exerts a potent selection mechanism and has resulted in a suite of antipredation adaptations encompassing morphological and behavioral traits in prey. In butterflies, several such traits appear to be directed towards birds which are considered as one of their major predators. LÄS MER

  5. 5. Escape flight in butterflies

    Detta är en avhandling från Stockholm : Department of Zoology, Stockholm University

    Författare :Maria Almbro; Stockholms universitet.; [2009]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Flight; Lepidoptera; gamete load; lipid accumulation; predation risk; hibernation; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; Zoology; zoologi;

    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