Risk-prone hunting by chimpanzees (Pan troglodytes schweinfurthii) increases during periods of high diet quality

By I. Gilby, R. Wrangham. Behavioral Ecology and Sociobiology, 2007

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Landscapes of Coexistence for terrestrial carnivores: the ecological consequences of being downgraded from ultimate to penultimate predator by humans (2015, background): “Hunger may also affect how an individual will use a “risk-prone” versus a “risk-averse” foraging strategy (Gilby and Wrangham 2007).”
Reply to comments. Two Key Steps in the Evolution of Human Cooperation: The Interdependence Hypothesis (2012, background): “In fact, the existence of a high-quality alternative food source (ripe drupe fruits) increases hunting probability at Kanyawara, even after the concomitant occurrence of large groups is controlled for (Gilby and Wrangham 2007).”
Economic Profitability of Social Predation Among Wild Chimpanzees: Individual Variation Promotes Cooperation (2008, background): “Contrary to that expectation, hunting frequency at our research site was positively correlated with diet quality, even when controlling for increases in party size ( Gilby & Wrangham 2007 ).”
Coordination of Chimpanzees (Pan troglodytes) in a Stag Hunt Game (2011, background): “The leader, by contrast, had to take some risk (see Gilby and Wrangham 2007; Heilbronner et al. 2008 for risk proneness of chimpanzees).”