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- Factors affecting tool use in wild bearded capuchin (Cebus libidinosus);
Factors affecting tool use in wild bearded capuchins (Cebus libidinosus). Contemporary optimization models in behaviour suggest animals in different foraging situations act to optimize benefits of foraging and minimize costs. In the case of nut-cracking by wild bearded capuchins, lifting the heavy stone and striking the nut may entail costs in several currencies and if the stone is not already at an anvil there are additional costs related to transporting the stone to the anvil. If the monkeys are attentive to any or all of these latter costs, they should act to minimize them during nut-cracking.