Numerous figures, illustrations, and tables; integration of new literature and concepts into field of primatology; emphasis upon both behavioral and cognitive mechanisms.

Clara B. Jones, Ph.D. has studied spiders, fish, monkeys, and humans, including work in the field, in zoological gardens, and in the laboratory. Most of her research, beginning in 1973, has been conducted on the howling monkeys of Central America. Her publications primarily relate to sexual selection, reproductive competition, social organization, interindividual conflicts of interest, dispersal, and evolution in heterogeneous regimes. She has also contributed to the literature on primate conservation and population biology.

to Intraindividual Variation of Primate Behavior.- The Costs and Benefits of Behavioral Flexibility to Inclusive Fitness: Dispersal as an Option in Heterogeneous Regimes.- Primate Signatures and Behavioral Flexibility in Heterogeneous Regimes.- Social Cognition and Behavioral Flexibility: Categorical Decision-Making as a Primate Signature.- Female Primates as Energy-Maximizers in Heterogeneous Regimes.- Male Primates: Time-Minimizers in Heterogeneous Regimes.- Intersexual Interactions in Heterogeneous Regimes: Potential Effects of Antagonistic Coevolution in Primate Groups.- Sociosexual Organization and the Expression of Behavioral Flexibility.- Behavioral Flexibility: Interpretations and Prospects.