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Fisherian runaway: Difference between revisions
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Over the course of the positive-feedback process, the initial correlation with fitness of the trait in question may lose its importance.<ref>https://academic.oup.com/beheco/article/19/2/456/214088</ref> | Over the course of the positive-feedback process, the initial correlation with fitness of the trait in question may lose its importance.<ref>https://academic.oup.com/beheco/article/19/2/456/214088</ref> | ||
=== | === Looks === | ||
Feedback loops in sexual selection like Fisherian runaway may have played a role in the evolution of beauty in some animals, but unlikely in case of facial attractiveness in humans as there is no positive link with lifetime [[reproductive success]] in a variety of cultures.<ref>https://doi.org/10.1016/j.evolhumbehav.2012.01.002</ref> | Feedback loops in sexual selection like Fisherian runaway may have played a role in the evolution of beauty in some animals, but unlikely in case of facial attractiveness in humans as there is no positive link with lifetime [[reproductive success]] in a variety of cultures.<ref>https://doi.org/10.1016/j.evolhumbehav.2012.01.002</ref> | ||
Even though human females are more choosy in accordance to [[Bateman's principle]], it is women who seem to be more ornamented with their [[Boobs|swollen breasts]]<ref>https://doi.org/10.1016/j.evolhumbehav.2010.02.005</ref> and hour-glass shaped body that men strongly desire, but which serve no | Even though human females are more choosy in accordance to [[Bateman's principle]], it is women who seem to be more ornamented with their [[Boobs|swollen breasts]]<ref>https://doi.org/10.1016/j.evolhumbehav.2010.02.005</ref> and hour-glass shaped body that men strongly desire, but which serve no known biological purpose. However, sexual preference for good looks could be merely a spandrel of a general preference for aesthetics, or it could be driven by a link between good looks and overall [[good genes hypothesis|good and healthy genes]]. | ||
In industrialized nations, facial masculinity is unrelated to mating and [[reproductive success]] (RS). Strength and muscularity were also only weak, but consistent predictors of mating and RS.<ref>https://www.biorxiv.org/content/10.1101/2020.03.06.980896v3</ref> | |||
Women's hourglass shaped waist is also not linked to higher RS or better health.<ref>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6563790/</ref> Unless there are strong confounds in industrial nations, the absence of a link to RS means these traits are unlikely sexually selected. See the [[penis]] article for a discussion of the plausibility of sexual selection having acted upon it. | |||
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Inaccurate and boring: | Inaccurate and boring: | ||