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<span id="zyzz"></span>[[File:41097916_1692099977584652_3713126534517620736_n.jpg|thumb|right|A popular sex icon: Zyzz, died young of sudden cardiac arrest from too much steroid use to make himself look hyper-masculine. He was not a [[reproductive success]]. The round shapes of pecs, bursa etc., repeating creases in the abs and smooth skin may as well be mere ornament.]] | <span id="zyzz"></span>[[File:41097916_1692099977584652_3713126534517620736_n.jpg|thumb|right|A popular sex icon: Zyzz, died young of sudden cardiac arrest from too much steroid use to make himself look hyper-masculine. He was not a [[reproductive success]]. The round shapes of pecs, bursa etc., repeating creases in the abs and smooth skin may as well be mere ornament.]] | ||
'''Fisherian runaway''' is a model of how [[sexual selection]] can lead to exaggerated | '''Fisherian runaway''' is a model of how [[sexual selection]] can lead to exaggerated physical or behavioral traits (ornament) and exaggerated preferences for these traits.<ref>Fisher RA. 1915. ''The evolution of sexual preference.'' Eugenics Review. 7:184–192. [[https://scholar.google.com/scholar_lookup?journal=Eugenics+Review&title=The+evolution+of+sexual+preference&author=RA+Fisher&volume=7&publication_year=1915&pages=184-192&pmid=21259607& Google Scholar]]</ref><ref>Huk T, Winkel WG. 2008. ''Testing the sexy son hypothesis—a research framework for empirical approaches.'' Behavioral Ecology. 19:456–461.[[https://scholar.google.com/scholar_lookup?journal=Behavioral+Ecology&title=Testing+the+sexy+son+hypothesis—a+research+framework+for+empirical+approaches&author=T+Huk&author=WG+Winkel&volume=19&publication_year=2008&pages=456-461 Google Scholar]]</ref> | ||
These exaggerated traits can potentially reduce population viability<ref>Encyclopedia of Ecology, By Brian D. Fath, page 316 [[https://books.google.com/books?hl=en&lr=&id=x1h7DwAAQBAJ&oi=fnd&pg=PA310&dq=%22fisherian+runaway%22+extinction+%22selection%22&ots=cq04BIA2Lf&sig=Otp5RbC3B_5W1ZR7Q3zGjPOe7uA#v=onepage&q=fisherian%20runaway&f Google Books]]</ref> likely contributing to extinction.<ref>https://www.theatlantic.com/science/archive/2018/04/males-penises-ostracods-extinction-sexual-selection/557756/</ref><ref>The evolution of sexual strategy in modern humans: an interdisciplinary approach by Collins, Kendra Marie, https://studyres.com/doc/2550939/--california-state-university</ref><ref name="moen1999">Moen et al., 1999 http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.525.2990&rep=rep1&type=pdf</ref> | These exaggerated traits can potentially reduce population viability<ref>Encyclopedia of Ecology, By Brian D. Fath, page 316 [[https://books.google.com/books?hl=en&lr=&id=x1h7DwAAQBAJ&oi=fnd&pg=PA310&dq=%22fisherian+runaway%22+extinction+%22selection%22&ots=cq04BIA2Lf&sig=Otp5RbC3B_5W1ZR7Q3zGjPOe7uA#v=onepage&q=fisherian%20runaway&f Google Books]]</ref> likely contributing to extinction.<ref>https://www.theatlantic.com/science/archive/2018/04/males-penises-ostracods-extinction-sexual-selection/557756/</ref><ref>The evolution of sexual strategy in modern humans: an interdisciplinary approach by Collins, Kendra Marie, https://studyres.com/doc/2550939/--california-state-university</ref><ref name="moen1999">Moen et al., 1999 http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.525.2990&rep=rep1&type=pdf</ref> | ||
The name derives from the originator of the concept, [https://en.wikipedia.org/wiki/Ronald_Fisher Ronald Fisher], the 20th century British statistician, geneticist, eugenicist and racialist. | The name derives from the originator of the concept, [https://en.wikipedia.org/wiki/Ronald_Fisher Ronald Fisher], the 20th century British statistician, geneticist, eugenicist and racialist. | ||