Why Is Sex Fun?: The Evolution Of Human Sexuality
Author:Jared Diamond
Language: eng
Format: mobi
Tags: sci_biology, sci_psychology, sci_culture
ISBN: 0465031277
Publisher: Basic Books
Published: 1997-01-01T00:00:00+00:00
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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