UM atUM [S05-ep04]: Sexual Dominance Under Siege
This week on "AUM science," Elise Huchard from the Institute of Evolutionary Sciences in Montpellier (ISEM) talks to us about sexual dominance in primates. The report takes us to ISEM’s palynology lab with Sylvie Rouland. A program broadcast every Wednesday on the radio station Divergence.
It has long been taken for granted—whether in grammar or in society—that the masculine takes precedence over the feminine. And what better way to establish dominance than to present it as a fact, or even a biological law? Thus, among animals, the male is said to dominate the female by nature.
A few counterexamples were cited to counter this argument from authority, such as the matriarchy among female elephants, the sexual dimorphism in hyenas favoring females, or, worse still, the voracious appetite of praying mantises. But these exceptions only served to confirm the rule: male dominance is a law of nature.
Upon closer inspection, this male dominance is far from the norm, and among many primate species, the females do not take this lying down. So are there social structures, lifestyles, or biological factors that favor the dominance of one sex over the other? Is a dominance relationship inevitable? And what evolutionary pathways might lead a species to adopt one type of dominance over another? A team of Franco-German researchers sought to answer these questions by compiling existing studies on the subject.
Elise Huchard, an ethologist at the Institute of Evolutionary Sciences in Montpellier, is a member of this team. They published this meta-analysis on variations in male-female dominance among primates in the journal PNAS, titled “The Evolution of Male-Female Dominance Relationships in Primate Societies.”
See also:
"Observing Grief Among Chacma Baboons," an article from Lum magazine discussing the work of Elise Huchard, which you can also listen to in the episode "From Chacma Baboon Grief to the Anatomy Museum."
In the second part of the program, we remain at ISEM for our second report and head to the palynology lab, which—as its name doesn’t necessarily suggest—is dedicated to the study of pollen grains. Sylvie Rouland shows us how to extract pollen grains from sediments and then identify them under a microscope. With nearly 30,000 taxa, ISEM’s reference collection is one of the largest palynological collections in the world.
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Co-production: Divergence FM / University of Montpellier
Host: Lucie Lecherbonnier
Interview: Lucie Lecherbonnier / Aline Périault
Report: Aline Périault
Director: Alice Rollet
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