A Comparison of Female Mating Strategies in <Emphasis Type="Italic">Pan troglodytes</Emphasis> and <Emphasis Type="Italic">Pongo</Emphasis> spp. |
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Authors: | R M Stumpf M Emery Thompson C D Knott |
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Institution: | (1) Department of Anthropology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA;(2) Department of Anthropology, Harvard University, Cambridge, MA 02138, USA;(3) Department of Anthropology, University of New Mexico, Albuquerque, NM, USA |
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Abstract: | Orangutans and chimpanzees differ in many aspects of their mating and social systems. Nevertheless, because both great apes
require enormous maternal investment in offspring and because female reproductive potential is limited, female orangutans
and chimpanzees should be selective of their mates, yet expected to exhibit anti-infanticide strategies such as mating with
multiple males. We review and compare mating patterns in orangutans and chimpanzees to understand how these critical pressures
are filtered through the different demands of the socioecology of each species. We highlight the variation in female mating
behavior as a function of the proximity of ovulation. We conclude that both genera pursue tactics for paternity confusion
by mating with multiple males and by mating cooperatively or even proceptively with nonpreferred partners when conception
is unlikely. Mating selectivity is suggested by variation in proceptive behavior toward particular partners and by increased
resistance of nonpreferred partners during the periovulatory period. Thus, data for both species support a mixed mating strategy
whereby females shift their mating behavior in accordance with ovulatory status to accommodate the competing demands of mate
selectivity and paternity confusion. |
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Keywords: | Chimpanzees orangutans reproductive strategies female mate choice |
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