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'''Fisherian runaway''' is a mechanism by which sexual selection leads to exaggerated, [[Maladaptiveness|maladaptive]] and unhealthy, physical traits (ornamentation) in some individuals of a species, sometimes contributing to reduced 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</ref> or ultimately extinction. | '''Fisherian runaway''' is a mechanism by which sexual selection leads to exaggerated, [[Maladaptiveness|maladaptive]] and unhealthy, physical traits (ornamentation) in some individuals of a species, sometimes contributing to reduced 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</ref> or ultimately extinction. | ||
Base sexual preference of an entire species can make them more likely to go extinct.<ref>https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2656.12601</ref><ref>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1691875/</ref><ref>https://www.sciencedaily.com/releases/2018/04/180411131646.htm</ref><ref>https://www.nature.com/articles/d41586-018-04059-7</ref> But the runaway selection of the most exaggerated members alone, arguably cannot cause the entire species to go extinct. However, together with environmental factors, female selection has played a role in extinction, for example in the the Irish Elk<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>Moen et al., 1999</ref> There are scientific models that show under a stable environment, a feedback loop can develop where male intrasexual competition leads to a linear increase in size dimorphism, outstripping the ability of the environment to to support this increased size.<ref>http://www.jstor.org/stable/2410506</ref>The name Fisherian runaway derives from the originator of the concept, Ronald Fisher, the 20th century British statistician, geneticist, eugenicist and racialist. | Base sexual preference of an entire species can make them more likely to go extinct.<ref>https://besjournals.onlinelibrary.wiley.com/doi/full/10.1111/1365-2656.12601</ref><ref>https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1691875/</ref><ref>https://www.sciencedaily.com/releases/2018/04/180411131646.htm</ref><ref>https://www.nature.com/articles/d41586-018-04059-7</ref> But the runaway selection of the most exaggerated members alone, arguably cannot cause the entire species to go extinct. However, together with environmental factors, female selection has played a role in extinction, for example in the the Irish Elk.<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>Moen et al., 1999</ref> There are scientific models that show under a stable environment, a feedback loop can develop where male intrasexual competition leads to a linear increase in size dimorphism, outstripping the ability of the environment to to support this increased size.<ref>http://www.jstor.org/stable/2410506</ref>The name Fisherian runaway derives from the originator of the concept, Ronald Fisher, the 20th century British statistician, geneticist, eugenicist and racialist. | ||
== Mechanism == | == Mechanism == |