Sökning: "mate choice"

Visar resultat 1 - 5 av 10 uppsatser innehållade orden mate choice.

  1. 1. Differences in velocity between the sexes and stages of courtship in a dance fly

    Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap

    Författare :Filip Myllyaho; [2022-02-17]
    Nyckelord :Dansfluga; Hilara maura; höghastighetskamera; partner-val; Dance fly; Hilara maura; high-speed camera; mate choice;

    Sammanfattning : Dance flies (Diptera: Empididae: Empidinae) are famous for their elaborate mating behaviour, which can be broken down to three distinct stages in adults: hunting, swarming, and mating. In many species, males hunt for prey that they present as nuptial gifts to recipient females in swarms, after which the pair will copulate in the air or after landing on nearby vegetation. LÄS MER

  2. 2. Assortativ parning hos sik (Coregonus lavaretus)

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Joni Riihimaa; [2022]
    Nyckelord :assortative mating; European whitefish; reproductive isolation;

    Sammanfattning : European whitefish (Coregonus lavaretus) forms reproductively isolated sub-populations with different body sizes in the lakes where northern pike (Esox lucius) exists. It has been hypothesized that the initial reproductive isolation between ecotypes arises through size-assortative mate choice or because small and large individuals arrive to the spawning grounds at different times. LÄS MER

  3. 3. Polyandry and genetic diversity in populations of Pholidoptera griseoaptera along an environmental gradient

    Kandidat-uppsats, SLU/Dept. of Ecology

    Författare :Matilda Jutzeler; [2019]
    Nyckelord :polyandry; genetic diversity; multiple mating; microsatellites; nuptial gift; phenotype;

    Sammanfattning : Polyandry is a common mating pattern in different insect species and it leads to increased genetic diversity in the offspring and prevents inbreeding in populations. According to the theory of mate choice, mates should choose a partner that will increase heterozygosity in their offspring. LÄS MER

  4. 4. Parasite burden and reproductive success

    Kandidat-uppsats, SLU/Dept. of Biomedical Sciences and Veterinary Public Health

    Författare :Monica Höjerslev; [2018]
    Nyckelord :parasiter; parasitbelastning; reproduktion; reproduktionsframgång; sexuella signaler; ornament;

    Sammanfattning : Reproduction is fundamental for passing on genes and secure species survival. One crucial point of this is mate choice, mating with an unbeneficial partner, they risk less advantageous offspring than if a better mate had been chosen. To be able to make these choices, sexual signals, or ornaments, are very useful tools. LÄS MER

  5. 5. Non-Independent Mate Choice in Female Humans (Homo sapiens) : Progression to the Field 

    Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning

    Författare :Axel Jönses Bernard Agnas; [2016]
    Nyckelord :Non-independent mate choice; Mate choice copying; Human mate choice; Social transmission.;

    Sammanfattning : There is much evidence that mate-choice decisions made by humans are affected by social/contextual information. Women seem to rate men portrayed in a relationship as more desirable than the same men when portrayed as single. LÄS MER