Why is Sex Fun?: the evolution of human sexuality by Jared Mason Diamond

Author:Jared Mason Diamond
Language: eng
Format: epub, pdf
Tags: sci_psychology, sci_culture, sci_biology
ISBN: ISBN 0-465-03127-7
Publisher: Basic Books

First, concealed ovulation.

Figure 4.3

By combining facts about modern observed species with inferences about ancestral species, one can infer the mating system prevailing when ovulatory signals underwent evolutionary change. We infer that species 3 evolved concealed ovulation from a harem-holding ancestor with slight signs of ovulation, while species I and 2 preserved the ancestral mating system (harems) and slight ovulatory signs.

lation arose, in a promiscuous or harem-holding species. Then, with concealed ovulation already present, the species switched to monogamy (see figure 4.4).

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