Essays about: "sexual selection"

Showing result 1 - 5 of 32 essays containing the words sexual selection.

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

    University essay from Göteborgs universitet / Institutionen för biologi och miljövetenskap

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

    Abstract : 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. READ MORE

  2. 2. The relative effect of gained extra-pair paternity versus ensured within-pair paternity on male fitness in collared flycatchers, Ficedula albicollis

    University essay from Uppsala universitet/Institutionen för biologisk grundutbildning

    Author : Lan Ma; [2022]
    Keywords : ;

    Abstract : Variation in a male ability to gain extra-pair paternity and maintain within-pair paternity are important sources of variation in male fitness in socially monogamous species and thus become the resource of sexual selection on male secondary sexual traits. While the maximum possible number of offspring sired within the social pair-bond is limited by the female’s clutch size, the possible number of sired extra-pair young could in theory by much higher. READ MORE

  3. 3. Sexually segregated habitat selection in Daubenton’s bat Myotis daubentonii

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Esnart Emma Bwalya Chibwe; [2021]
    Keywords : sexual segregation; Daubenton’s bat; Myotis daubentonii; landscape analysis; habitat selection; foraging;

    Abstract : Sexual segregation is a phenomenon present in many vertebrate taxa, including the bat order Chiroptera. Sexual segregation is a social and/or habitat separation based on sex and is driven by varying causes such as sexual dimorphism, resource and physiological limitations, predator avoidance and many other factors. READ MORE

  4. 4. 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

  5. 5. 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