The evolution of female copulation calls in primates: a review and a new model |
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Authors: | Gauri R Pradhan Antje Engelhardt Carel P van Schaik Dario Maestripieri |
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Institution: | (1) Animal Behavior Research Group, The University of Chicago, Chicago, IL 60637, USA;(2) German Primate Center, Gottingen, 37077, Germany;(3) Anthropological Institute and Museum, University of Zurich, Zurich, 2057, Switzerland;(4) The University of Chicago, 5730 S. Woodlawn Avenue, Chicago, IL 60637, USA |
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Abstract: | Female copulation calls are mating-associated vocalizations that occur in some species of Old World monkeys and apes. We argue
that copulation calls have two immediate functions: to encourage mating attempts by other males and to increase mate guarding
by the consort male. We hypothesize that female copulation calls have evolved under the selective pressures of risk of infanticide
and sperm competition. When male mate guarding is effective, copulation calls allow females to concentrate paternity in dominant
males and benefit from their protection against the risk of infanticide. When mate guarding is ineffective, copulation calls
may bring genetic benefits to females through facilitation of sperm competition. We present a quantitative model in which
interspecific variation in females' promiscuity predicts their tendency to use copulation calls in conjunction with mating.
The model predicts that in species with little female promiscuity, copulation calls should be rare and exhibited only in association
with mating with dominant males. In species in which females are highly promiscuous, copulation calls should be frequent and
unrelated to male dominance rank. The limited data available to test the model support its main predictions as well as the
predicted relation between copulation calls and male dominance rank.
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Keywords: | Sexual selection Infanticide Sperm competition Copulation calls Primates |
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