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Fisherian runaway: Difference between revisions
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Positive feedback loops in sexual selection can be arbitrarily initiated when a trait is slightly correlated with fitness, for example when it is associated with viability, objective [[beauty|aesthetics]] (aesthetic sexual selection), or when a trait is similar in appearance to already attractive or otherwise valued objects or body parts.<ref>Fuller, R. C., Houle, D., & Travis, J. 2005. ''Sensory Bias as an Explanation for the Evolution of Mate Preferences.'' [[https://www.jstor.org/stable/10.1086/444443 Abstract]], p. 444</ref> For example, women's breasts may have evolved to mimic their buttocks because the latter was already a sexually attractive body part before humans developed upright posture, and then Fisherian runaway may have lead to breasts becoming increasingly larger and increasingly attractive to men. | Positive feedback loops in sexual selection can be arbitrarily initiated when a trait is slightly correlated with fitness, for example when it is associated with viability, objective [[beauty|aesthetics]] (aesthetic sexual selection), or when a trait is similar in appearance to already attractive or otherwise valued objects or body parts.<ref>Fuller, R. C., Houle, D., & Travis, J. 2005. ''Sensory Bias as an Explanation for the Evolution of Mate Preferences.'' [[https://www.jstor.org/stable/10.1086/444443 Abstract]], p. 444</ref> For example, women's breasts may have evolved to mimic their buttocks because the latter was already a sexually attractive body part before humans developed upright posture, and then Fisherian runaway may have lead to breasts becoming increasingly larger and increasingly attractive to men. | ||
Over the course of the positive-feedback process, the initial correlation with fitness of the trait in question | 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> | ||
=== Beauty === | === Beauty === | ||