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Gorrila sex

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    A field study of wild mountain gorillas was conducted to elucidate details of sexual initiation required for an interpretation of the increased frequency of copulation during the menstrual cycle, in comparison to the wild, that occurs when this species is tested in traditional laboratory pair tests. Although females in the wild played a clear role in establishing and maintaining proximity to the male and assertively presenting for copulation, all female presenting was preceded by some form of behavior by the male. Although originally described as male aggression in the laboratory tests, such behavior now appears to be male sexual initiative, elicited by female proximity. The exaggerated form and frequency of the display in the laboratory, and the increased copulation during the cycle that ensued, are likely due to 1 placing females in proximity to a male daily, rather than on 2—3 days of estrus as occurs in the wild, and 2 the inability of the female in the laboratory to withdraw from male proximity during pair tests in a single cage. In addition to clarifying the data on laboratory pair tests, the data on wild gorillas have relevance to the captive breeding of gorillas. This is a preview of subscription content, access via your institution.
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    Gorilla sex video: therapy for longtime bachelor from Como Zoo

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    Sexual initiation in wild mountain gorillas | SpringerLink

    Mammalian play is believed to improve motor skills as well as facilitate the development of social relationships. Given the marked sexual dimorphism in gorilla body size and the role assumed by the male in protecting the group from conspecifics and predators, the motor-training hypothesis of play predicts that male infants should exhibit higher frequencies of social play than female infants, and that males should prefer to play with other males. Given that adult female gorillas are strongly attracted to adult breeding males and form only weak social bonds with unrelated adult females, the social-relationship hypothesis of play predicts that female infants should prefer to play with males. These hypotheses were tested in a month study of 12 gorilla infants, aged between years, living in three zoological parks in Chicago and Atlanta.
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    The strategic use of sex in wild female western gorillas

    Human females, unlike most mammals, are sexually active outside of fertile periods. This decoupling of sexual behavior from its conceptive function has had an enormous impact on human social relationships, and yet we know little about why there was selection for nonconceptive mating. Here we examine one form of nonconceptive mating, the mating that occurs during pregnancy or post-conceptive PC mating, in wild western gorillas Gorilla gorilla.
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    By Ewen Callaway. Female gorillas use sex as a tactic to thwart their rivals, new research suggests. Pregnant apes court their silverback male to stop other females conceiving. Her team chronicled the sex lives of five female western lowland gorillas and one silverback almost every day for more than three years. This kind of competitive behaviour may even help explain how humans evolved into a mostly monogamous species, she says.
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