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An Ecological Model of Female-Bonded Primate Groups
- R. Wrangham
A model is presented to account for the evolution of FB groups in terms of ecological pressures on female relationships and suggests that relationships in most FB groups are ultimately related to feeding competition.
Cultures in chimpanzees
It is found that 39 different behaviour patterns, including tool usage, grooming and courtship behaviours, are customary or habitual in some communities but are absent in others where ecological explanations have been discounted.
Ecological constraints on group size: an analysis of spider monkey and chimpanzee subgroups
Field studies of spider monkeys and chimpanzees were used to test a model of ecological constraints on animal group size which suggests that group size is a function of travel costs and assess ecological and social factors underlying the social organization of these two species.
Evolution of coalitionary killing.
- R. Wrangham
- PsychologyAmerican journal of physical anthropology
Current evidence supports the hypothesis that selection has favored a hunt-and-kill propensity in chimpanzees and humans, and that coalitional killing has a long history in the evolution of both species.
The “Domestication Syndrome” in Mammals: A Unified Explanation Based on Neural Crest Cell Behavior and Genetics
It is proposed that the domestication syndrome results predominantly from mild neural crest cell deficits during embryonic development, which can be readily explained as direct consequences of such deficiencies, while other traits are explicable as indirect consequences.
Evolutionary Consequences of Fallback Foods
The assumption that fallback foods play an important role in shaping morphological adaptations, behavior, and socioecology in primates is examined and it is suggested that preferred resources tend to drive adaptations for harvesting foods.
CHARTING CULTURAL VARIATION IN CHIMPANZEES
Cultural variation among chimpanzee communities or unit-groups at nine long-term study sites was charted through a systematic, collaborative procedure in which the directors of the sites first agreed…
Demonic Males: Apes and the Origins of Human Violence
This study is an analysis of the roots of human savagery, dealing with the fundamental questions of why the majority of violence is perpetrated by men, whether this is a matter of nature or nurture…
Howlers: variations in group size and demography
Fruit and flower phenology at two sites in Kibale National Park, Uganda
- C. Chapman, R. Wrangham, L. Chapman, D. Kennard, A. Zanne
- BiologyJournal of Tropical Ecology
- 1 March 1999
Spectral analysis indicated that community-level flowering and fruiting at Kanyawara exhibited regular annual peaks, although the flowering peaks were of shorter duration, and this suggests that the minimum temperature in the previous dry season is important in determining how many individuals fruit.