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Runaways have an elevated risk of destructive behavior. Approximately fifty percent of runaways experience difficulties with schooling; including dropping out, expulsion, or suspension. [ 5 ] Running away can increase the risk of delinquency for adolescents, and expose them to the risk of victimization. [ 6 ]
These are direct phenotypic benefits, sensory bias, the Fisherian runaway hypothesis, indicator traits and genetic compatibility. In the majority of systems where mate choice exists, one sex tends to be competitive with their same-sex members [ 4 ] and the other sex is choosy (meaning they are selective when it comes to picking individuals to ...
The explanation based on group selection was that such behaviour might be adapted to alerting other gazelle to a cheetah's presence or might be part of a collective behaviour pattern of the group of gazelle to confuse the cheetah. Instead, Zahavi proposed that each gazelle was communicating that it was a fitter individual than its fellows. [4]
Sexual selection creates colourful differences between sexes in Goldie's bird-of-paradise.Male above; female below. Painting by John Gerrard Keulemans.. Sexual selection is a mechanism of evolution in which members of one sex choose mates of the other sex to mate with (intersexual selection), and compete with members of the same sex for access to members of the opposite sex (intrasexual ...
The peacock tail in flight, the classic example of an ornament assumed to be a Fisherian runaway. Fisherian runaway or runaway selection is a sexual selection mechanism proposed by the mathematical biologist Ronald Fisher in the early 20th century, to account for the evolution of ostentatious male ornamentation by persistent, directional female choice.
The term derives from the Greek δραπέτης (drapetēs, 'a runaway [slave]') and μανία (mania, 'madness, frenzy'). [ 9 ] As late as 1914, the third edition of Thomas Lathrop Stedman 's Practical Medical Dictionary included an entry for drapetomania , defined as " vagabondage , dromomania ; an uncontrollable or insane impulsion to wander."
The indirect aggression in which females engage can take the form of damaging the reputation of other women (e.g., via gossip), potentially influencing their sexual behavior and opportunities. [104] Additionally, females compete with one another through male mate choice, e.g., by enhancing their own physical attractiveness. [ 104 ]
European pied flycatcher Ronald Fisher in 1912. The sexy son hypothesis in evolutionary biology and sexual selection, proposed by Patrick J. Weatherhead and Raleigh J. Robertson of Queen's University in Kingston, Ontario in 1979, [1] states that a female's ideal mate choice among potential mates is one whose genes will produce males with the best chance of reproductive success.