Sökning: "Göran Arnqvist"
Visar resultat 1 - 5 av 16 avhandlingar innehållade orden Göran Arnqvist.
1. Sexual selection and intersexual conflicts in water striders
Sammanfattning : .... LÄS MER
2. The evolution of mating rates in Pieris napi
Sammanfattning : In the green-veined white butterfly (Pieris napi), females obtain direct fitness benefits from mating multiply and studies have shown that fitness increases seemingly monotonically with number of matings. The reason is that at mating males transfer a large nutritious gift (a so called nuptial gift) to the females that the females use to increase both their fecundity and lifespan. LÄS MER
3. Cryptic Female Choice and Male Mating Behaviour : Sexual Interactions in Beetles
Sammanfattning : The importance of cryptic female choice, i.e. female post-copulatory influence over male reproductive success, in driving the evolution of male traits remains controversial. The main aim of this thesis was to understand the post-copulatory consequences of sexual interactions and the importance of cryptic female choice in two species of beetle. LÄS MER
4. Sexual conflict and male-female coevolution in the fruit fly
Sammanfattning : Harmony and cooperation was for long believed to dominate sexual interactions. This view slowly started to change 25 years ago and is today replaced with a view where males and females act based on what is best from a costs-benefits perspective. LÄS MER
5. Postmating Sexual Selection and its Role in Population Divergence in Beetles
Sammanfattning : Speciation is the process describing the formation of new species and is at the heart of evolutionary biology. According to the biological species concept only reproductively isolated forms are regarded good species. This thesis aims at identifying evolutionary processes that cause population divergence and, ultimately, speciation. LÄS MER