Sökning: "mate choice"
Visar resultat 1 - 5 av 10 uppsatser innehållade orden mate choice.
- Master-uppsats, Göteborgs universitet / Institutionen för biologi och miljövetenskap
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
- Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap
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. Polyandry and genetic diversity in populations of Pholidoptera griseoaptera along an environmental gradientKandidat-uppsats, SLU/Dept. of Ecology
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
- Kandidat-uppsats, SLU/Dept. of Biomedical Sciences and Veterinary Public Health
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
- Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildning
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