• Publications
  • Influence
Meat sharing among the Gombe chimpanzees: harassment and reciprocal exchange
  • I. Gilby
  • Psychology
  • Animal Behaviour
  • 1 April 2006
Sharing food with nonkin is detrimental to a food donor's fitness, unless it is matched by compensatory benefits. I evaluated two explanations for nonkin meat sharing among wild chimpanzees, PanExpand
  • 224
  • 23
Association patterns among wild chimpanzees (Pan troglodytes schweinfurthii) reflect sex differences in cooperation
Theory predicts that frequent dyadic association should promote cooperation through kin selection or social tolerance. Here we test the hypothesis that sex differences in the strength and stabilityExpand
  • 132
  • 12
Core area quality is associated with variance in reproductive success among female chimpanzees at Kibale National Park
Female East African chimpanzees, Pan troglodytes schweinfurthii, tend to range apart from each other in dispersed core areas, and they have dominance interactions with each other so rarely that it isExpand
  • 153
  • 10
  • PDF
Interaction location outweighs the competitive advantage of numerical superiority in Cebus capucinus intergroup contests
Numerical superiority confers a competitive advantage during contests among animal groups, shaping patterns of resource access, and, by extension, fitness. However, relative group size does notExpand
  • 135
  • 10
  • PDF
A conceptual framework for nonkin food sharing: timing and currency of benefits
Many animal species, from arthropods to apes, share food. This paper presents a new framework that categorizes nonkin food sharing according to two axes: (1) the interval between sharing andExpand
  • 134
  • 10
  • PDF
Risk-prone hunting by chimpanzees (Pan troglodytes schweinfurthii) increases during periods of high diet quality
Most studies suggest that during times of nutritional stress, an animal faced with two foraging choices should follow a risk-prone strategy, choosing the option with highest payoff variance. ThisExpand
  • 99
  • 8
Ecological and social influences on the hunting behaviour of wild chimpanzees, Pan troglodytes schweinfurthii
There has been considerable discussion of the factors that influence the hunting behaviour of male chimpanzees. Explanations invoking social benefits hinge upon the potential for males to share meatExpand
  • 85
  • 8
Lethal aggression in Pan is better explained by adaptive strategies than human impacts
Observations of chimpanzees (Pan troglodytes) and bonobos (Pan paniscus) provide valuable comparative data for understanding the significance of conspecific killing. Two kinds of hypothesis have beenExpand
  • 250
  • 7
  • PDF
Fitness benefits of coalitionary aggression in male chimpanzees
Coalitionary aggression occurs when at least two individuals jointly direct aggression at one or more conspecific targets. Scientists have long argued that this common form of cooperation hasExpand
  • 176
  • 6
Use of overlap zones among group-living primates: a test of the risk hypothesis
Summary Overlap zones between home ranges of neighboring groups of primates are routinely reported to be under-used. However, little is known about how the size of overlap zones varies, or whatExpand
  • 83
  • 6
  • PDF
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