Sökning: "fecundity"

Visar resultat 1 - 5 av 67 avhandlingar innehållade ordet fecundity.

  1. 1. Fecundity in butterflies : adaptations and constraints

    Författare :Bengt Karlsson; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Fjärilar; reproduktion;

    Sammanfattning : .... LÄS MER

  3. 2. Body Size Evolution in Butterflies

    Författare :David Berger; Karl Gotthard; Wolf Blanckenhorn; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Body size evolution; age- and size at maturity; life history theory; fecundity; predation risk; juvenile growth rate; Lepidoptera; Biology; Biologi; zoologisk ekologi; Animal Ecology;

    Sammanfattning : Life history research deals with the scheme of resource partitioning to a wide spectra of processes and the trade-offs shaping these events. One of the most fundamental life history trade-offs is the one of at which age- and size an organism should start to reproduce; reaching a large size at maturity is often advantageous in terms of high adult survival and reproductive potential, while to attain a larger size the organisms must prolong juvenile development which is assumed costly in terms of mortality. LÄS MER

  4. 3. On perfect simulation and EM estimation

    Författare :Kajsa Larson; Sara Sjöstedt de Luna; Mats Rudemo; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Perfect simulation; coupling from the past; Markov chain Monte Carlo; point process; Widom-Rowlinson model; EM algorithm; dispersal distribution; fecundity; first-passage percolation; Mathematical statistics; Matematisk statistik; Mathematical Statistics; matematisk statistik;

    Sammanfattning : Perfect simulation  and the EM algorithm are the main topics in this thesis. In paper I, we present coupling from the past (CFTP) algorithms that generate perfectly distributed samples from the multi-type Widom--Rowlin-son (W--R) model and some generalizations of it. LÄS MER

  5. 4. Endocrine markers of ovarian function: Clinical and biological aspects with focus on Anti Müllerian hormone

    Författare :Leif Bungum; Malmö Reproduktionsmedicin; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Anti Müllerian Hormone; ovarian reserve; biomarker; Luteinizing Hormone; fecundity; fertility; Time to Pregnancy;

    Sammanfattning : Declining birthrates and infertility are now a common problem in the Western World. Due to the tendency to postpone childbearing an increasing age of women who consider motherhood is generally seen. LÄS MER

  7. 5. Mating strategies of male butterflies in relation to female fecundity and polyandry

    Författare :Lena Svärd; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Insekter; Fjärilar;

    Sammanfattning : .... LÄS MER