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sexual selection theory

Harvard University Press, Cambridge, Mass. Females are larger and more aggressive than males. Mutual attraction between the sexes is an important factor in reproduction. These traits will be genetically transmitted and spread in the population, despite their negative effects on female reproductive success, if the reproductive success of these males is higher than that of males lacking such traits (Parker 1979). evolution of female choice. Sexual selection, theory in postulating that the evolution of certain conspicuous physical traits—such as pronounced coloration, increased size, or striking adornments—in animals may grant the possessors of these traits greater success in obtaining mates. mate with multiple males? [10] Darwin was accused of looking to the evolution of early human ancestors through the moral codes of the 19th century Victorian society. These indirect benefits are usually genetic rather than resource based. [35] When there is a high density of males present in the population, competition tends to be less aggressive and therefore sneak tactics and disruptions techniques are more often employed. Ethology 84, 202-231 (1990). [52] Thus color could act as a "health certificate" that allows females to visualize the underlying oxidative stress induced damage in potential mates. differences between sexes (sexual dimorphism), The Descent of Man and Selection in Relation to Sex, The Genetical Theory of Natural Selection, Major histocompatibility complex and sexual selection, "Large testicles are linked to infidelity", "On the Tendency of Species to form Varieties; and on the Perpetuation of Varieties and Species by Natural Means of Selection", "Models of speciation by sexual selection on polygenic traits", "Fitness and its role in evolutionary genetics", "Genetic benefits enhance the reproductive success of polyandrous females", Population benefits of sexual selection explain the existence of males phys.org May 18, 2015 Report, "Sexual Selection, Costs, and Compensation", "Evolution of genitalia: theories, evidence, and new directions", Comparative evidence for the evolution of genitalia by sexual selection, "Nutritional state – a survival kit for brooding pipefish fathers", "Current hypotheses for the evolution of sex and recombinationn", "The form of sexual selection arising from male-male competition depends on the presence of females in the social environment", "Fight outcome briefly affects the reproductive fitness of male crickets", "Larval competition risk shapes male–male competition and mating behavior in an anuran", Tales of two snails: sexual selection and sexual conflict in Lymnaea stagnalis and Helix aspersa Oxford Journals, Female control: Sexual selection by cryptic female choice, "The Trail Pheromone of a Stingless Bee, Trigona corvina (Hymenoptera, Apidae, Meliponini), Varies between Populations", "Good genes, oxidative stress and condition-dependent sexual signals", PLoS ONE: Sexual Selection and the Evolution of Brain Size in Primates, The ant and the peacock: altruism and sexual selection from Darwin to today, Human vocabulary use as display. By continuing we’ll assume you’re on board with our cookie policy, Your Deadline is Too Short? This assortative mating will establish a genetic correlation between the preference and the trait. Parker, G. Sperm competition and its Sexual selection can also occur as a product of pheromone release, such as with the stingless bee, Trigona corvina.[49]. His research pned across 37 cultures and involved 10 thousand participants of different religion,ethnic and economic groups, increasing the validity of the study. [5] In certain hermaphroditic snail and slug species of molluscs the throwing of love darts is a form of sexual selection. While male-male competition can occur in the presence or absence of a female, competition occurs more frequently in the presence of a female. The Genetics Society of America (154) 1419:1426, Andersson, M. and Simmons, L.W. Richard Dawkins presents a non-mathematical explanation of the runaway sexual selection process in his book The Blind Watchmaker. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. (Aves: Pipridae). With primitive societies accepting diverse notions of beauty, aesthetic preferences, he believed, could account for the origin of the human races.….

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