Essays about: "sexual selection"

Showing result 6 - 10 of 34 essays containing the words sexual selection.

  1. 6. The role of copulatory wound infliction on fitness in Drosophila melanogaster

    University essay from Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Author : Dennis Leandersson; [2021]
    Keywords : Copulatory wounding; Fecundity; Drosophila; Fitness; Cryptic female choice; Adaptive harm hypothesis; Pleiotropic harm hypothesis;

    Abstract : One of the more fascinating Darwinian puzzles in sexual selection is that of copulatory wounding. For those taxa displaying this behavior, and that does not engage in traumatic insemination, the function of wound infliction during copulation remains unknown. READ MORE

  3. 7. Wing Shape Variation In A Damselfly: Effects Of Range Margins And Latitude

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Desirée Kristensson; [2021]
    Keywords : damselfly; evolution; distribution; sexual selection; range margins; Lestes sponsa; geometric morphometric;

    Abstract : An optimal wing shape is necessary for the survival of winged insects since it enables different survival strategies and is expected to vary between environments due to different selection pressures. However, few studies have explored wing shape variation across the whole range of a species. READ MORE

  4. 8. Population structure of Puccinia graminis, the cause of stem rust on wheat, barley, and rye in Sweden

    University essay from SLU/Dept. of Forest Mycology and Plant Pathology

    Author : Clara Kjellström; [2021]
    Keywords : plant pathology; plant disease; crop protection; fungi; P; graminis f.sp. tritci; P. graminis f.sp. secale; P. graminis f.sp. hordei;

    Abstract : Rust fungi belong to the phylum Basidiomycetes, order Uredinales cause damage on almost all plants, including cereal crops. Some of the species within the genus Puccinia causes rust disease on cereal crops. One example of a disease from this genus is Puccinia graminis, which historically has caused severe damage in cereal crop production. READ MORE

  5. 9. The effect of humor styles on mate value and preferences in an online experiment

    University essay from Umeå universitet/Institutionen för psykologi

    Author : Anders Fredriksson; Groundstroem Henrik; [2020]
    Keywords : Evolution; sexual selection; fitness signal; humor styles; mate value; partner preference;

    Abstract : Humor is likely to serve as signals of fitness in potential partners. Less is known about how different styles of humor affect partner attractiveness. This study aimed to test the attractiveness of the four different humor styles proposed by Martin et al. READ MORE

  6. 10. Density of sperm-producing tissue is positively linked to male reproductive success, but not to testes size in the Japanese quail (Coturnix japonica)

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Martine Graf; [2020]
    Keywords : Japanese quail; testes size; seminiferous tubule; sperm concentration; testes asymmetry; artificial selection;

    Abstract : If sexual selection acts in a sex-limited way on a trait that has a shared genetic basis between males and females, the resulting intralocus sexual conflict can have a considerable impact on the opposite sex. A prime example of sexual conflict affecting a shared characteristic would be the reproductive organs in males and females. READ MORE