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Does the prevalence of same-sex encounters in a group of Puerto Rican monkeys enhance their ability to pass along their genes? By Emily Willingham.
As a counterpoint to these critiques, researchers who pursued these studies emphasized that a biological cause of same-sex sexual behaviors could offer a defense against persecution arising from culture-based moral claims. The never-replicated findings have been controversial, and the quest for genes linked to same-sex behaviors in humans and other primate species continues to this day.
In the study, Vincent Savolainen, a professor of organismic biology and director of the Georgina Mace Center for the Living Planet at Imperial College London, and his colleagues tracked the social behavior of male rhesus macaques during a three-year period on Cayo Santiago , a acre island off the coast of Puerto Rico. They found that 72 percent of males engaged in same-sex behavior, compared with 46 percent that opted for liaisons with the opposite sex.
If you're enjoying this article, consider supporting our award-winning journalism by subscribing. By purchasing a subscription you are helping to ensure the future of impactful stories about the discoveries and ideas shaping our world today. The results challenge a so-called Darwinian paradox that expresses a sense of perplexity about the prevalence of same-sex sexual behaviors in many species. The conundrum boils down to the fact that some animals expend energy on nonreproductive sexual behavior that does not seem to contribute to passing along genes to later generations, a concept known as evolutionary fitness.